A Web Based GIS Database System by Jing Wang Master of
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1. and User AOIs connect to oracle database Sdb_conn ocilogon DBADMIN DBADMINPASSWD DBNAME Search database for matching username and password Squery SELECT USER_ID PERMISSION LASTNAME FIRSTNAME FROM UMACUSER WHERE USERNAME Susername AND PASSWORD Scryptpwd Sresults queryDB db_conn query store User_ID permission and user s first name into session variables if count results USER_ID gt 0 S_SESSION Suser_id Sresults USER_ID 0 S_SESSION Spermission Sresults PERMISSION 0 S_SESSION Srealname Sresults FIRSTNAME 0 IT Sresults LASTNAME 0 connect to database to get aoi information Sdb_conn ocilogon DBUSER DBUSERPASSWD DBNAME Squery SELECT AOI_NAME EXTENT FROM DBADMIN USERAOI WHERE USER_ID S_SESSION Suser_id Sresults queryDB db_conn query Srownum count Sresults AOI_NAME 31 if Srownum gt 0 for Si 0 Si lt Srownum i Saoi Sresults AOI_NAME Si Sresults EXTENT Si store AOI list into session variable S_SESSION Saoi serialize Saoi If the query results in at least one match from the administrative database session information is stored and area of interest AOI information is fetched from the user information database 32 CHAPTER V SOFTWARE VERIFICATION AND VALIDATION Software Verification refers to the set of activities that ensure that s2. 2 The system default Print dialog pops up and helps you through the printing process Save Map Icon This icon lets you save the map as it is in the map window as an image file only in PNG format You can save what you see in the window Instructions 1 Click the Save Map button 2 The system default Save dialog pops up and helps you through the saving process 46 t Pan Icon This icon allows you to pan shift the map to the desired direction Instructions 1 Select the Pan Icon by clicking on it 2 Click on any corner or side of the map you wish to pan 3 The map will pan to the desired direction 4 The Pan icon and the small direction icons in yellow orange color around the map perform the same function of panning the map in a desired direction The only difference is that with Pan icon you will have to select the icon first by clicking on it and then you have to click on some corner of the map to pan in that direction whereas with the direction icons clicking on any of those direction icons will pan the map towards that direction 2 Layer Panel The layer panel Figure 2 features many layers which convey information about various spatial features Multiple layers can be overlaid on one another to make a map according to your needs and can be viewed in the Map window or printed and saved The layers are categorized into different groups which can be minimized or maximized by clicking on the group names The layers DOQ
3. if yes it will get user ID user Permission AOIs could be empty if no AOL is stored in database and update the menu bar on the homepage User name Login request Ki Password By the User User permission User Information AOI Information User Session User ID Permission AOIs Permission granted VE P rmission denied Updated Menu bar Figure 10 DFD of User Login Band Combination Selection Band Combination Selection process is displayed in Figure 11 User sends Band Combination information change request from homepage Band Combination Selection process updates the user session information set Refresh Image flag Display Image process will get the image information from user session create an new image and refresh the homepage 18 Bands number Bands request Brightness By the User Bands number User Session Brightness Combination Selection Image Name bands number layers map extension Brightness factor product type colorscheme Refresh Figure 11 Band Combination Selection Color scheme selection Color scheme Selection process is displayed in Figure 12 User chooses color scheme on the homepage Color scheme Selection process updates the user session information set Refresh Image flag Display Image process will get the image information from user session create an new image and refresh the homepage Color scheme Color scheme Request by the User C
4. DRG and Shaded Relief are Scale dependent they can be viewed only at a particular zoom level The Shaded Relief layer cannot be viewed at greater zoomed level The DOQ and DRG layers are obtained from the Microsoft TerraServer using Web Map Service which require you to view them at moderate zoom levels The Layer Panel can be resized minimized or moved in the web browser according to your convenience Instructions Enable the layers which you want to display by clicking in the checkboxes next to them To disable the layers uncheck the boxes next to those layers Click the Select Layers button on the top of the Layer panel The selected layers will be displayed in the map window Pon 3 Image List Panel The layer panel contains a list of Raster images in GeoTIFF format Different images cover different areas on the map The image list varies according to the map extent At any instance the list shows images that are covering the area that is viewed in the map window Each image is shown with a name which describes the Acquisition Date Sensor type and Coverage information If an image covers the current map window completely then is shown as Full otherwise it shown as Partial The image list can refined by selecting a particular sensor type in the Select box on the top of the panel to view images only from that sensor covering the displayed area in the map window Default Sensor type shows all the images from all the sensors The Image List Pa
5. E Township FT timezone IT A airport TV interstate I V state Highway 20 FEB 05 MODIS250 Full 02 SEP 03 ETM Partial 7 34 MAY 03 ETM Partial 46 SEP 02 ETM Partial 943053 W 1 pixel 241 01 m 29 JUL 02 ETM Partial E S 29 JUL 02 ETM Partial R 6 B fi sis af Product Type Natural Color 27 JUN 02 ETM Partial E Brightness f Change 27 JUN 02 ETM Partial CAN Current S download C 14 JUN 02 ETM Partial 7 08 JUN 02 ETM Partial The map is zoomed in 04JUN 02 ETM Partial E 539 521 208 190 ff i internet 7 28 SEP 01 ETM Partial Figure 21 Digital NGP Version 3 0 2 Users were interested in Version 3 0 2 and sent us comments Based on these comments three new features were added and three bugs were fixed The newest version 3 0 3 was released on Jan 18 2005 The release notes are as following Digital NGP version 3 0 3 released 18 Jan 2005 We announce the release of DNGP version 3 0 3 This release is build upon the version 3 0 1 and involves one major change and some minor changes Please help us make the DNGP serving you better by sending your suggestions and comments to our development team 40 What s new 1 3 The layout of the interface has been modified to fit into most of the monitor resolutions A context area is added just above the map window The information in the context area is dynamically updated accord
6. consists of several separate modules running on an application server This tier is multi tiered itself In DNGP this tier consists of Apache web server Mapserver4 0 PHP programs and C programs The Apache web server is the first level of this tier it receives queries from tier 13 1 interprets and runs PHP programs The PHP programs are the second level in tier 2 it accesses database runs C programs and calls mapserver The output of PHP programs is html and JavaScript which is the tierl interface The C programs and Mapserver4 0 are the third level in tier 2 Tier 3 is the Database Management System DBMS A DBMS on a host computer stores the data required by the middle tier In DNGP this tier is an Oracle 9i database management system in which we store and maintain our geospatial data Please refer to Figure 7 System Architecture End User Queries A Results Tier 1 Queries f results Tier 2 Queries results Database Computer Tier 3 DBMS Geospatial data Figure 7 System Architecture 14 3 1 2 STATE TRANSITION DIAGRAM A state transition diagram shows the state space of a given context the events that cause a transition from one state to another and the actio
7. of this study Most of all I would like to thank Dr Tom Wiggen for his support and guidance through the duration of this work Dr Wiggen provided a motivating enthusiastic and critical atmosphere during the many discussions we had It was a great pleasure to me to work with him and conduct this project under his supervision Many thanks to my supervisor Dr Xiaodong Zhang in UMAC for the encouragement advice and assistance on this project Special thanks go to my family for their constant love understanding and many sacrifices without which would have made this work impossible Vil ABSTRACT In this report we describe the design and implementation of Digital NGP Website a Web based GIS database system for UMAC clients to download Geospatial Data This system is a three tier Web database application Tier 1 is User Interface Tier 2 is the Functional Module This level actually processes data It consists of Apache web server Mapserver4 0 PHP programs and C programs Tier 3 is the Database Management System DBMS viii CHAPTER I INTRODUCTION Satellites and airborne cameras provided the ability to capture a massive amount of digital imagery that is of value for agriculture The Upper Midwest Aerospace Consortium UMAC supports a repository for some of this imagery and is developing a delivery system to make this data available to UMAC clients in the upper midwest This software engineering project analyzes the needs of
8. pages as described by their titles 11 J DIGITAL Northern Great Plains Digital NGP Microsoft Internet Explorer File Edt view Favorites Tools Help Heak O A A ser State Greda F BD 3 3 Address http idisita ngp sero und edujnewdngp index php w US DialtalNGP 5 After Successful LOGIN A Ce Manage AOI Delete AO Figure 6 Navigation Buttons 12 CHAPTER M HIGH LEVEL AND LOW LEVEL DESIGN After requirements analysis I did the high level and low level design 3 1 HIGH LEVEL DESIGN System Architecture gives us the overview of the Web database application The server technology used for this project is PHP 5 with JavaScript 3 The server side script is written in PHP The client side script is written in JavaScript 3 1 1 SYSTEM ARCHITECTURE The current Website is a three tier Web database application Tier 1 is User Interface It runs on a desktop PC or workstation client and uses a standard graphical user interface Web browser In our application our web pages act as Herl which is requested by the user through his Web browser and is sent there from our Web server for display Then user can use the controls on the web pages to send further queries to Web server Web server will respond to these queries and send result web pages to user s Web browser In the existing DNGP this tier consists of html and JavaScript Tier 2 is the Functional Module This level actually processes data It
9. us make the Digital NGP serving you better please send your suggestions and comments to the development team What s new 1 The major change Instead of auto loading the most recent satellite image as a certain scale is reached what will be auto displayed is the high resolution up to 1 meter pixel digital photograph DOQ that is hosted at TerraServer USA 2 Instead of using two scale bars one for miles and one for kilometers there is only one scale bar showing miles and the other one showing scales in terms of meters per pixel 3 The default mode for showing an image is the true color band combination 4 Some minor bugs are fixed 5 The code has been cleaned and is tighter than before 37 Known issues 1 The new version currently does not function properly under Mac and we are working on this issue 2 Under windows Internet Explorer when you drag the panel around you may notice some panel components floating above the rest of the panel components This is a known issue for the Windows Internet Explorer and we are working towards an alternative Figure 20 displays homepage of version 3 0 1 A DIGITAL Northern Great Plains Digital NGP 2827_053103 tif Microsoft Internet Explorer File Edit View Favorites Tools Help Q 0 PE JO search Se Favorites S media el B7 2 A Address e http dngp aero und edu newdngp301 index php Si Go Google BB Search Web gi 100 blocked El Antoni Fd Option
10. users and designs and implements an enhanced version of UMAC s initial prototype delivery system 1 1 BACKGROUND The goal of the Upper Midwest Aerospace Consortium UMAC is to provide information about the environment that enables people to make decisions improving their e Economic Competitiveness e Quality of Life e Educational Preparedness The primary source of the information is data acquired by satellites and aircraft Beneficiaries of the information include e Farmers practicing Precision Agriculture e Ranchers seeking Optimum Grazing Capacities e Foresters engaged in Sustainable Forestry Educators teaching Responsible Stewardship Students K through lifelong learners of Earth System Science Here are some terms and explanations from UMAC homepage http www umac org 1 Partnership Every UMAC activity 1s in response to a need expressed by individuals or organizations of stakeholders The Consortium is distributed geographically to bring information close to its end users UMAC includes partners in government private industry and non governmental organizations as well Precision Agriculture using information technologies to bring data from multiple sources to bear on crop and livestock production decisions Noxious Weed Eradication from Rangelands The weed leafy spurge scourge of the West can be detected by sensors that see light in many separate colors The exact pattern in the light signals is different fo
11. A Web Based GIS Database System by Jing Wang Master of Science Chinese Academy of Sciences A Project Submitted to the Graduate Faculty of the University of North Dakota in partial fulfillment of the requirements for the degree of Master of Science Grand Forks North Dakota August 2005 This report submitted by Jing Wang in partial fulfillment of the requirements for the Degree of Master of Science from the University of North Dakota has been read by the Faculty Advisor under whom Y has been done and is hereby approved Signature hovel GA Date Me A RAS This project document meets the standards for appearance conforms to the style and format requirements of the Computer Science Department of the University of North Dakota and is hereby approved Vy Signature _ j Date July 2 2 00 ii PERMISSION Title A Web Based GIS Database System Department Department of Computer Science Degree Master of Science In presenting this report in partial fulfillment of the requirements for a graduate degree from the University of North Dakota I agree that Department of Computer Science shall make it freely available for inspection I further agree that permission for extensive copying for scholarly purposes may be granted by the professor who supervised my work or in his absence by the Chairperson of the Department Signature d 4 lJ Date Hey K 200 111 TABLE OF CONTENTS PERMISSI
12. Interest AOI by entering the bounding coordinates and Delete AOls Instructions 1 Place the mouse cursor on the DNGP AOI Button 2 A drop down menu appears with the Create AOI and Delete AOI entries 3 Make the selection and click on it to go to desired function Create AOI Click on Create AOI link 2 Enter the name of AOI Enter the values in DMS format and should be either in clock wise anti clockwise format 3 To enter longitude values you can either enter the values with the hemisphere for eg 106 25 34 56 W with a space between degree minute seconds and direction For Latitude the value is 44 29 68 09 N 4 Alternatively the values can also be entered with a negative sign in front of it without the hemisphere For eg 106 25 34 56 with a space between the degree minute and seconds but NO space between the sign and the degree value 5 AOI will be created which can be accessed from the View AOI menu in the Control Panel 50 Create AOI 1 Click on Create AOI with Map link 2 Zoom in to the desired Area of Interest 3 Enter the AOI Name and click Create AOI Button Delete AOI 1 Click on Delete AOI link 2 Select the AOI Names you want to delete and click Delete AOI 3 AOI values deleted are removed permanently from the database and are irrecoverable Only after logging into the Digital NGP this button appears This button allows you to manage your account Instructions 1 Place the mouse c
13. OI Import User_ID map extension AOI name Export Session information for User_ID map extension and AOI name Module Logout Export flags to reset session information about AOI list 25 CHAPTER IV IMPLEMENTATION After completing the high level and low level design the functional modules are implemented in PHP JavaScript and C The complete source code is in appendix A In this chapter we present the pseudocode for these modules and some code examples 4 1 MODULES IMPLEMENTATION The processing steps for each data flow diagram can be formally described using pseudocode In this section we use the format Module lt module name gt lt filel gt lt file2 gt Implementation lt pseudocode gt To present our pseudocode where lt module name gt is the logical name of the module lt filel gt lt file2 gt etc are filenames of source code implementing this module and lt pseudocode gt is our English like description of the processing that occurs Module Login login php index php hide php Implementation Get username and password from the homepage Search Username Permission user AOIs with the username and password in the database 26 If Username exists Set Username Set user permission Set user AOIs Display corresponding menu bar to user Else Set login failure flag Display error message Module User Registration index php register php hide php Implementation Get user information from registration
14. ON osas ts DA AR A AR A AN 111 IST OFFIGURES eeey niea sia v ACKNOWLEDGMENT Sscinsicases pintor i e er pE a AER AE ER eg vii ABSTRACT Unid AN vill CHAPTER I INTRODUCTION ET 1 H REQUIREMENTS AND SPECIFICATIONS ooooccccnconcnncnncnccncnncnncnanncnnos 6 M HIGH LEVEL AND LOW LEVEL DRSON 13 IV IMPLEMENTATION getest A EES 26 V SOFTWARE VERIFICATION AND VALIDATION 33 VI CONCE UDS TON Sis 43 REFERENCES IAEA a 44 APPENDIX A A ARA AAA AAA AAA 45 APPENDIX EE 52 iv LIST OF FIGURES PA A RR el 8 IAN PA AAA AAA 9 A o A 10 4 Reference Map Padel a EEN EEN 10 Control Panel 20 iS A beets ele Cans E 11 6 Navigation BUON ra tio 12 Je System O os de 14 8 State Transition Diarra iii ias 15 DEDO User Resistration SOS 17 10 DEDO User Loihi seer SA 18 11 DFD of Band Combination Selecton 0 cece ccc ence ence cence ence eeaeenaeeeaaeees 19 12 DED of Color scheme Selection sii2255 eg Seika a 19 DEDO Image Select eege a 20 14 DFD OF a yersSclech ri Rss 21 15 DED ot Productos dd R 21 16 DED of View AOL a 22 Pye DPD Of Create ADLER A AAA ARE Segue tetas 23 18 DED Or User Logot Aoi NAAA T RERE 23 19 Digital NGP Version 3 0 0 Homepage 36 20 Digital NGP Version 3 0 1 Homepage 38 21 Digital NGP Version 3 0 2 oc vcccenecnceae saecwsbevesd ENEE RR d ANER ENNEN ANEN EAR EEN 40 22 Dista NGP Version DS AE ASA A 42 vi ACKNOWLEDGMENTS I would like to express sincere thanks to the many people who have contributed to the completion
15. Pan a Zoom In Hontana North Dakota E Zoom Out Pan East J G Query Map SY Print Map Map Interface Icons Save Map Pan Southwest Pan South Pan SouthEast o mo ul Gan woow Jo zs som ScaleBar in Miles Latitude Longitude ScaleBar in Kilometers Figure 1 Map Panel 2 Layer Panel The layer panel features many layers that convey information about various spatial features The layers are displayed in seven groups Boundaries Transportation Water Geology Raster layer Agriculture and Environment Multiple layers can be overlaid on one another to make a map according to your needs and can be viewed in the Map window or printed and saved J Boundaries ia City A State County O Township O a Time Zone Transportation Aiport O BL Interstate O d Mi State Highway Geology CL e Earth Quake A Volcano OL soit O Forest Cower O pd Land Cover i el w a Ny UU Figure 2 Layer Panel 3 Image List Panel The Image List panel contains a list of Raster images in GeoTIFF format Different images cover different areas on the map The image list varies according to the map extent At any instance the list shows images that are covering the area that is viewed in the map window Each image is shown with a name which describes the Acquisition Date Sensor type and Coverage information If an image covers the current map window completely then is shown as Full otherwise 1t s
16. angles representing data stores including electronic stores such as databases or XML files and physical stores such as or filing cabinets or stacks of paper Here I only list the processes that have been reengineered 16 3 2 1 DATA FLOW DIAGRAM User Registration Figure 9 shows User Registration process remote user sends registration request from homepage input user name password email address and other personal information User Registration process validates these information and insert the valid user information into database and display registration success message to user if the username is already in the database shows error message User Registration request Information By the User User Information User User Information Registration Duplicate iser New user Registration success Figure 9 DFD of User Registration User Login User Login process is displayed in Figure 10 User Information is the user table in the database which stores user s last name first name username password email address etc AOI information is AOI table in the database that stores users AOIs which could be null when there is no AOI for the user User session is a set of variables stores current session values 17 The login request is sent from homepage User Login process searches the database for the username and password if the username not found or password does not match display error message to user
17. ate AOI AOI Information Pe User ID AOI name AOI Mav extension Names Map extensions Figure 17 DFD of Create AOI User Logout User Logout process is displayed in Figure 18 Logout process gets the logout request from homepage reset session information about User ID Permission and AOIs and refresh menu bar on the homepage Logout Request User Session by the User Permission User ID AOI s Logout User Updated Menu bar Figure 18 DFD of User Logout 3 2 2 MODULE DESIGN From these DFDs I decomposed this project into ten modules 23 Module Login Uses ViewAOI Import username and password from homepage Export session information for User_ID Permission User_AOI flag of setting menu bar flag of setting AOI list or flag of setting error message Module Registration Import First name Last name address city state zip phone email username password secret question and secret answer Export Registration status Module Band Combination Selection Uses Image Display Import bands number brightness and factor Module Color Scheme Selection Uses Image Display Import color scheme Module Image Selection Uses Image Display Import image name Module Layers Selection Uses Image Display Import Layers Module Product Selection Uses Image Display 24 Import product type Module View AOI Import map extension from homepage Export Session information for map extension Module Create A
18. e map Or the map will be redrawn to show your area of interest when a rubber band box is drawn a Zoom Out Icon This button lets you view a larger area with less detail Instructions 1 Select the Zoom Out Icon by clicking on it Click on the spot of the map 3 The map will be redrawn to shown a greater extent centered on the mouse position ro 45 Full Extent Icon This button lets you view the entire region covered by UMAC North Dakota South Dakota Montana Wyoming Idaho and Minnesota Instructions Click the Full Extent button 2 The map will be redrawn showing the entire UMAC area The difference between this button and Home button is the Full Extent button will just change the map coverage to view the entire UMAC area without making any other changes whereas Home button will reset all the settings to default and restart the website Query Map Icon This icon shows the attributes associated with the enabled layers in the Layer panel when clicked on any location on the map Instructions 1 Select the Query Map Icon by clicking on it 2 Select the layers in the Layer panel on which you want to perform the query 3 Click on any point of map A The attributes of the layers at the point click will be displayed in a new window Print Map Icon This icon lets you print the map as it is in the map window on a paper You can print what you see in the window Instructions 1 Click the Print Map button
19. e user session information create the product set Refresh Image flag Display Image process will get the image information from user session create an new image and refresh the homepage Product Selection Request by the User Product Product type User Session Product Selection Image Name bands number layers map extension Brightness factor product type colorscheme Refresh image Image Display png file Figure 15 DFD of Product selection 21 View AOI View AOI process is displayed in Figure 16 User selects an AOI on the homepage View AOI process updates the user session information set Refresh Image flag Display Image process will get the image information from user session create an new image and refresh the homepage AOI name Map extensio AOI Request by the User Map extension User Session Display AOI Image Name bands numbe layers map extension Brightness factor product type Refresh image colorscheme Figure 16 View AOI Create AOI Create AOI process is displayed in Figure 17 User sends the AOI creation request from homepage to Create AOI process the Create AOI process gets User ID and current map extension from user session stores User ID AOI name and map extension into the database then refresh the AOI list on the homepage 22 AOI name AOI Creation Request User ID by the User Map extension User Session Cre
20. eb 3 Gro blocked El 11 Pa Options 4 You are using ower Anes DB once REGISTER bre ORE orc ESET Boundaries M e City M AN State Vv County rime I Ml timezone Q sx Transportation f Band Combination C a apot Ir alle ie aA T interstate Brightness i 0 a TAS State Highway change Giwer y View a Product Select Image r Color Scheme Sensor Defaut z a Download 21 APR 05 TM Partial 13 OCT 04 TM Partial c Al ee 29 SEP 04 ASTER VNIR Partial Bands A amp 29 SEP 04 ASTER VNIR Partial download 29 SEP 04 ASTER VNIR Partial 29 SEP 04 ASTER VNIR Partial 29 SEP 04 ASTER VNIR Partial 29 SEP 04 ASTER VNIR Partial 26 SEP 04 ASTER VNIR Partial 22 SEP 04 TM Partial 16 SEP 04 TM Partial 18 SEP 04 TM Partial 12 SEP 04 TM Partial 12 SEP 04 TM Partial hd 4 _ o 140 280 mi o 220 440 km Figure 19 Digital NGP Version 3 0 0 Homepage 36 Users including farmers ranchers foresters educators students and UMAC faculties tested this version and provided us feedbacks Based on the user feedbacks we added few new functions and fixed some minor bugs On Oct 21 2004 version 3 0 1 was published The following is the release notes Digital NGP version 3 0 1 released 21 Oct 2004 We announce the release of Digital NGP version 3 0 1 This release is build upon the version 3 0 0 and involves one major change and some minor changes Again to help
21. er It met the original requirements but the maintenance of the old versions was very hard The main reasons are the old versions didn t follow software engineering process the system design was not scaleable By applying the software engineering to the project the website was redesigned implemented and tested New versions version 3 0 0 and newer have better user interface and are faster and maintenance is easier 43 REFERENCES 1 Ghezzi Carlo Jazayeri Mehdi Mandrioli Dino Fundamentals of Software Engineering second edition Prentice Hall 2002 2 Roger S Pressman Software Engineering sixth edition McGraw Hill Higher Education 2005 3 Danny Goodman Javascript Bible ga edition 1998 4 Remez Elmasri Shamkant B Navathe Fundamentals of Database Systems Third Edition 2000 5 David Sklar Learning PHP 5 2004 44 APPENDIX A Software Manual Digital NGP or DNGP is an online GIS database system for archiving and delivering remote sensing images and geo spatial information You can retrieve high resolution satellite imagery and interactive maps easily from our system but you may not be familiar with all the features for manipulating the images exploring the maps their themes and the data contained in the map layers This document describes the features involved in our system and how you can use them to effectively retrieve the data and information from our system The Digital NGP website features a modula
22. erface where you will need to answer your Hint Question created at the time of Registration H you answer correctly then we will let you create a new password for your account If you have any problem with the Login please contact us through the DNGP QUESTION navigation button and we would be very happy to help you promptly ON NOTE Once you are logged in to our system and if use the web browser s Refresh button or the DNGP Home button then you will be required to Login again The Register button takes you to Registration screen Instructions 49 1 Click the Register Button 2 Anew window pops up where you can Enter the registration details and click Register 3 The rows marked are required and have to be provided before the process is complete The Question button takes you to Comments Question window where you can send your suggestions requests comments bugs or doubts about Digital NGP to us Instructions 1 Click the DNGP QUESTION Button 2 Anew window pops up where you can Enter your comments or questions about our Website The Help button brings you to this Help screen Instructions 1 Click the Help Button 2 A new window pops up with this Help page The Home button restarts the website Instructions 1 Click the Home Button 2 The Digital NGP website restarts with the default settings ouer Only after logging into the Digital NGP this button appears This button allows you to create an Area of
23. form Search if user exists in database If the username exists Display error message Else Input user information into database Display registration success message Module Band Combination Selection bandcombo php hide php Implementation Get bands information from homepage Set session information about bands combination and refresh image flag 27 Create new image Refresh the image on homepage Module Color Scheme Selection scheme php hide php Implementation Get color scheme from homepage Set session information about color scheme and refresh image flag Create new image Refresh the image on homepage Module Image Selection imagelist php hide php Implementation Get image name from homepage Check if the image is in database If image exists Set session information about image name and refresh image flag Create the new image Refresh the image on homepage Else Display error message 28 Module Layers Selection legend php hide php Implementation Get layers from homepage Set session information about layers and refresh image flag Create the new image Refresh the image on homepage Module Product Selection product php hide php Implementation Get product type from homepage Create the product Set session information about product type and refresh image flag refresh band combination selection flag refresh color scheme flag refresh download production selection flag Refresh the image on homepage Module Vie
24. h our clients Any negative feedback from clients will be to guide a second iteration of the software development life cycle 1 3 STRUCTURE OF THIS REPORT The next chapter describes the requirements and specifications of this project Chapter 3 contains High level and Low level Design Chapter 4 is focused on implementation of this project Chapter 5 is Verification and Validation Chapter 6 contains Conclusions Appendix A includes the user manual and all the code is stored in the CD Rom attached as Appendix B CHAPTER II REQUIREMENTS AND SPECIFICATIONS Requirements are the users need for the system A requirements specification is an agreement between the end user and system developer we can view it as a definition of what the implementation must achieve Xiaodong Zhang assistant professor in UMAC provided requirements of DNGP project 2 1 REQUIREMENTS Users for the DNGP website are categorized as anonymous user and registered user Anonymous user could select image layers select remote sensing image for raster layer view a product choose band combination adjust brightness choose a color scheme and download a product There are three kinds of registered users to our system 1 Normal User is the registered user who has normal user permission Normal user should be able to execute all the functions that anonymous user could execute In addition he or she can create their Area of Interest AOD view an AOI manage AOIs and
25. hown as Partial The image list can refine by selecting a particular sensor type in the Select box on the top of the panel to view images only from that sensor covering the displayed area in the map window D1 JUL 04 TM Partial 01 JUL 04 TM Partial 24 JUN 04 TM Partial 24 JUN 04 TM Full 17 JUN 04 TM Partial 03 SEP 03 TM Partial 02 SEP 03 ETM Partial 25 AUG 03 TM Full 18 AUG 03 TM Partial 17 AUG 03 ASTER VNIR Full 16 AUG 03 TM Partial 24 JUL 03 TM Partial 24JUL 03 TM Full Figure 3 Image List Panel 4 Reference Map Panel The Reference Map panel gives a reference of the location that is being viewed in the Map window with respect to the entire UMAC coverage by highlighting with a red colored pointer You can change the current location displayed in the Map window by clicking on any other location on the reference map Figure 4 Reference Map Panel 10 5 Control Panel This feature allows the user to manipulate and download the chosen raster image The buttons over the control panel will be enabled only if an image is selected and displayed in the map window Band Combinati A Lo P Brightness 1 Change View a Product False Color A Color Se Downlod Sugar Beet Yield All Current Bands View download AO d an AC Create an AOI AOI Name e po Figure 5 Control Panel 6 Navigation Buttons The navigation buttons on the Digital NGP header image provide links to other
26. ind these two quick access buttons on the right side of Map panel Expanded layers now contain all kind of information on census land cover water trace metal and etc And best of all we keep adding More remote sensing sensors We are now archiving data from SRTM Shuttle Radar Topography Mission and ASTER Advanced Spaceborne Thermal Emission and Reflection Radiometer on Terra in addition to the traditional MSS TM and ETM from LandSat series Improved control panel You can change band combination for multispectral images and color scheme for single band images alter brightness choose various remote sensing products and download images and products in Geo TIFF format 35 Known issues 1 The new version currently does not function properly under Mac and we are working on this issue 2 Under windows Internet Explorer when you drag the panel around you may notice some panel components floating above the rest of the panel components This is a known issue for the Windows Internet Explorer and we are working towards an alternative 3 There will always be some issues unknown to us now please report to us once you find one Figure 19 displays homepage of version 3 0 0 A DIGITAL Northern Great Plains Digital NGP Microsoft Internet Explorer File Edit View Favorites Tools Help O x A serch rare Urea O 2 2 Je Address http dngp aero und edu newdngp index php i Google y ES Search W
27. inder dry areas red at right and land managers can take fire preventive actions 1 2 PROBLEM STATEMENT DNGP Digital Northern Great Plains project is sponsored by UMAC The goal of this project is to build an integrated web based Geographic Information System This system provides the access to Landsat imagery and Landsat derived products NDVI Green NDVI Sugar Beet Yield from the current season and the entire UMAC Landsat archive over 400 scenes covering Montana Wyoming Minnesota North Dakota and South Dakota DNGP can also be used to explore other geospatial data including highways rivers lakes shaded relief and census data The DNGP project is sponsored by the UMAC The purpose of this project is to provide an easy tool for clients of UMAC to download Geospatial Data Our clients include farmers ranchers and researchers UMAC has built the DNGP Website which is 3 an interactive maps system Through DNGP Website you can browse and download remote sensing images covering Montana Wyoming Minnesota North Dakota and South Dakota DNGP Website can also be used to explore other geospatical data including highways rivers lakes shaded relief and census data The current Website is a three tier Web database application Tier 1 is User Interface It runs on a desktop PC or workstation client and uses a standard graphical user interface Web browser In our application our web pages act as tierl which is req
28. ing to actions a user takes The information includes the action taken what you are currently viewing and what can be done next and etc Improved the tool tips Bugs that have been fixed 1 The check mark for the selected image becomes unchecked once the image is zoomed in Query returns only county and state information even when additional layers selected The progress bar was not properly renewed preventing the time step from being re initialized after the progress bar was stopped especially under Mozilla type of browsers Figure 22 shows the homepage of Digital NGP Version 3 0 3 41 A 3026_090203 tif Microsoft Internet Explorer File Edit View Favorites Tools Help Qua O gt x 2 221 O searen Favorites SI Media le BD Address http dngp aero und edu newdngp303 index php Township Time Zone TA aiport TAS interstate TA State Highway Te pam TOPS watershed all Select Image Metadata 1 MODIS250 24 APR 05 MODIS250 Partial 40 APR 05 MODIS250 Partial 20 FEB 05 MODIS250 Partial 02 SEP 03 ETM Partial 34 MAY 03 ETM Partial 20 MAY 03 ETM Partial 09 APR 03 ETM Partial 31 OCT 02 ETM Partial 20 SEP 02 ETM Partial 48 1834 N 96 15 13 W 1 pixel 747 53 m Figure 22 Digital NGP Version 3 0 3 42 CHAPTER VI CONCLUSION Previous versions of Digital NGP Version 2 0 and older were developed in an ad hoc mann
29. lays the map covering that AOI Create AOI This box is enabled if you are logged into the website You can save your AOI for later use by selecting the location in the map window and giving it a name in the box provided Note After selecting an image if you refresh the webpage using the Browser Refresh button then the control panel buttons would be disabled To enable them you will have to reselect the image in the image panel 6 Navigation Buttons The navigation buttons Figure 6 on the Digital NGP header image provide links to other pages as described by their titles Ea The Login button takes the you to login screen where you can enter username and password to logon to your account Upon success the login button changes to Logout button rm Instructions 1 If you don t have an account with Digital NGP then you need to create an account by clicking the Register Button If you already have an account with us Click the Login Button A new window pops up and lets you enter the username and password Upon successful logon you can use the DNGP AOI navigation button to manage your AOI and DNGP ACCOUNT navigation button to manage your ACCOUNT information 5 The DNGP LOGIN button changes to DNGP LOGOUT You can successfully end your session by clicking the LOGOUT button or by closing the web browser or by refreshing the page 6 If you forgot your password then you can follow the FORGOT PASSWORD link on the login int
30. manage his or her own account information Area of Interest is an Area of a map that user is interested in By storing AOIs in our system the user could go directly to particular part of the map without searching and zooming 2 Image Administrator is the registered user who has image administrator permission Image Administrator should be able to manage his or her own account manage all the images in our database Account Administrator is the registered user who has account administrator permission Account Administrator should be able to manage all the accounts and all the images in our system 2 2 SPECIFICATIONS DNGP website features a modularized interface design resembling the Windows environment that most of people are used to There are user navigation buttons and five independent panels for map reference map image list layers and controls each of them can be independently moved resized and minimized 1 Map Panel The Map panel consists of the map window to view the images maps and corresponding legend The right side of the panel consists of interface icons which help in navigating the map retrieving the map and getting information about specific features The bottom side of the panel displays the scale at which the map is displayed using scale bar and also displays the corresponding cursor position on the map in Latitude and Longitude Pan NorthWest Pan North Pan NorthEast Des Full Extent Map Window
31. nabled when an image is selected and displayed in the map window The brightness of the image can be increased or decreased from 0 1 to 100 times the original value Default is 1 View a Product This box is enabled when an image is selected and displayed in the map window You can select from a range of products obtained from the image including Natural color False color NDVI GREEN NDVI Sugar beet yield Upon selecting the required product the image in the map window changes accordingly with the corresponding legend integrated in the map Then you can either download the current view of the image in the map window or print or save the map Color Scheme This button is enabled upon selection of the specific products like NDVI GREEN NDVI and Sugar Beet Yield You can select the grey or color scheme The image in the map window changes accordingly with legend integrated in the map Download 48 This button is enabled when an image is selected in the map window You can download either all the bands or the current view of the raster image in the map window with selected band combinations default is RGB in GeoTIFF format View AOI This box is enabled if you are logged into the website If you have already created AOls either from the map using the Create an AOI button in the Control Panel or from the Navigation buttons on the DNGP AOI menu they will be displayed as a list Upon selecting an AOI name from the list the map window disp
32. nel Figure 3 can be resized minimized or moved in the web browser according to your convenience 47 Instructions 1 Select the image you would like to view 2 Click on the Select Image button at the top of the Panel 3 The image shows up in the map window 4 Reference Map Panel The Reference Map panel Figure 4 gives a reference of the location that is being viewed in the Map window with respect to the entire UMAC coverage by highlighting with a red colored pointer You can change the current location displayed in the Map window by clicking on any other location on the reference map The Reference Map Panel can be minimized or moved in the web browser according to your convenience 5 Control Panel This feature allows the user to manipulate and download the chosen raster image The buttons over the control panel will be enabled only if an image is selected and displayed in the map window The Control Panel Figure 5 can be resized minimized or moved in the web browser according to your convenience Band Combination These buttons are enabled when an image is selected and displayed in the map window If the image contains more than 3 bands then the Red Blue and Green bands 4 2 and 1 bands are selected by default You can change the band combinations depending on the number of bands the image contains to suit your needs The corresponding bands of the image will be displayed in the map window Brightness This button is e
33. new version of Digital NGP and highly appreciate 1f you can send your suggestions and comments to the development team What s new 1 Fast The Digital NGP version 3 discards the use of Java Applet which is slow and has been used in all the previous versions for zoom in and out pan and query Now we use lightweight Javascript to furnish these functions As a result an image will show up much quicker than it used to be Appearance The new version also features a modulized interface design resembling the Windows environment that most of our users are used to There are five independent panels for map reference map image list layers and controls each of them can be independently moved resized and minimized Also there is a status bar showing progress for impatient users including ourselves Interoperability From the Digital NGP version 3 website you can seamlessly access high resolution aerial photogram DOQ and digitized paper map DRG both of which are actually hosted at TerraServer USA However instead of searching around you can display a DOQ photograph in 34 your familiar Digital NGP environment plus numerous vector layers at your hand to be overlaid What s been improved 1 Redesigned Map window panel Your mouse movement over the Map panel is continuously tracked and its location latitude and longitude is updated just below the map Quickly print what you see and download what you see You can f
34. ns that result The state transition diagram Figure 8 I use for this project displays all the possible states of the system as circles An arrow connects one state state 1 to another state state 2 if a transition from state 1 to the state 2 is possible And the arrow is labeled to indicate the event that triggers the state transition Logged in as Normal User Not logged in Logged in as Image Administrator 10 Logged in as Account Administrator Figure 8 State Transition Diagram Note 1 Either user name or password is not correct 2 Normal user login 3 Normal user logout 15 4 Image Administrator login 5 Image Administrator logout 6 Account Administrator login 7 Account Administrator logout 8 Normal user process images 9 Image Administrator upload images 10 Account Administrator manage accounts 3 2 LOW LEVEL DESIGN Data Flow Diagrams show the flow of data from external entities into the system shows how the data moves from one process to another as well as its logical storage Figure 3 3 to Figure 3 10 present DFDs using the Gane and Sarson notation for this project There are only four symbols Squares representing external entities which are sources or destinations of data Rounded rectangles representing processes which take data as input do something to it and output it Arrows representing the data flows which can either be electronic data or physical items Open ended rect
35. oftware correctly implements a specific function Validation refers to a different set of activities that ensure that the software that has been built is traceable to customer requirements Verification and validation encompasses a wide way of Software quality assurance SQA activities that include formal technical reviews quality and configuration audits performance monitoring algorithm analysis development testing usability testing qualification testing and etc Testing plays an extremely important role in V amp V Testing does provide the last bastion from which quality can be assessed and more pragmatically errors can be uncovered But testing should not be viewed as a safety net As they say You can t test in quality If it s not there before you begin testing it won t be there when you are finished testing Quality is incorporated into software throughout the process of software engineering In this project we combined software testing with software reengineering We published version 3 0 0 of this project after we redesigned our Digital NGP website on Oct 12 2004 and posted the release notes as following Digital NGP version 3 0 0 released 12 Oct 2004 We have completely re designed our Digital NGP website and here announce the release of Digital NGP version 3 0 0 33 The new version is significantly faster than any previous versions plus has many additions of new features We strongly encourage you to test this
36. olor scheme User Session Color scheme Selection Image Name bands number layers map extension Brightness factor product ty colorscheme Image Display Figure 12 DFD of Color scheme selection 19 Image Selection Image Selection process is displayed in Figure 13 User selects an image on the homepage Image Selection process updates the user session information set Refresh Image flag Display Image process will get the image information from user session create an new image and refresh the homepage Image Selection Request by the User User Session Selection Refresh image Image Name bands number layers map extension Brightness factor product type colorscheme Figure 13 Image selection Layers Selection Layers Selection process is displayed in Figure 14 User selects layers on the homepage Layers Selection process updates the user session information set Refresh Image flag Display Image process will get the image information from user session create an new image and refresh the homepage 20 Layers Selection Request by the User User Session Layers Selection Image Name bands number layers map extension Brightness factor product type colorscheme Refresh image png file Figure 14 DFD of Layers selection Product Selection Product Selection process is displayed in Figure 15 User selects a product type on the homepage Product Selection process updates th
37. r leafy spurge than it is for grass and other welcome vegetation Pinpointing its existence from satellites and aircraft is the first step toward eradicating the weed Disease Scouting for Sugar Beet Producers In the valley straddling the Red River between North Dakota and Minnesota exists a billion dollar sugar beet industry Diseases that cripple beet production can be spotted by airborne sensors detecting radiation the eye cannot see before the disease e g the fungus rhizoctonia is visible to a farmer Fertilizer Applications for Wheat Farmers In years of adequate rainfall a wheat crop is limited when nutrients in the soil are exhausted Soil nutrients can be supplemented by applying nitrogen fertilizer In years when not enough rain falls 2 lack of moisture limits the crop additional fertilizer will not turn a bad crop into a good one but the chemicals applied unnecessarily will run off into streams or be released to the atmosphere By monitoring a wheat crop s growth from a satellite a farmer can determine whether to add fertilizer during the growing season Sustainable Forestry balancing timber extraction and replacement rates for long term economic and environmental health Fire Danger Index Like a fever in a sick person trees and plants trying to draw water from dry soil have elevated temperatures Using satellites to read vegetative temperature and to estimate how much of it is being stressed scientists can highlight t
38. rized interface design resembling the Windows environment that most of you are used to There are user navigation buttons and five independent panels for map reference map image list layers and controls each of them can be independently moved resized and minimized 1 Map Panel The Map panel Figure 1 consists of the map window to view the images maps and corresponding legend The right side of the panel consists of interface icons which help in navigating the map retrieving the map and getting information about specific features The icons are black in color by default when clicked the icon becomes active and will be highlighted in maroon color The bottom side of the panel displays the scale at which the map is displayed using scale bar and also displays the corresponding cursor position on the map in Latitude and Longitude The Map Panel can be moved in the web browser according to your convenience Q Zoom In Icon This button lets you view part of the map in greater detail You can either just click on the map at the desired location or you can hold the mouse key down to drag a box over an area of interest Instructions 1 Select the Zoom In Icon by clicking on it 2 Position the cursor over the part of the map you want to see in greater detail and click 3 Or Click on a point and drag the mouse to draw a rubber band box defining your area of interest 4 The map will be redrawn to show 2 times more detail when clicked on th
39. s 4 26 JUL 04 TM Partial 26 JUL 04 TM Partial 19 JUL 04 TM Partial Bowntoad 24 JUN 04 TM Partial 24JUN 04 TM Partial 17 JUN 04 TM Partial 03 SEP 03 TM Partial 02 SEP 03 ASTER VNIR Parti 02 SEP 03 ETM Partial 25 AUG 03 TM Partial 18 AUG 03 TM Partial 24JUL 03 TM Partial E PI A 47181 N 94304 W 1 pixel 241 01 m 24 JUL O3 TM Partial 12 SEP 04 TM Partial ee iew E Done PT i internet E Figure 20 Digital NGP Version 3 0 1 Homepage 38 Then we collected feedbacks again from users We added a new feature and fixed the known issue 2 of version 3 0 1 Digital NGP version 3 0 2 was published on Dec 10 2004 The following is the release notes of version 3 0 2 Digital NGP version 3 0 2 released 10 Dec 2004 We announce the release of Digital NGP version 3 0 2 This release is build upon the version 3 0 1 and involves several minor changes Again to help us make the Digital NGP serving you better please send your suggestions and comments to the development team What s new 1 When you mouse over through the image list the boundary of a partial covered image is displayed on the map 2 The layout of the main page is changed The homepage of version 3 0 2 is shown in Figure 21 39 0 X OSO erne ore File Edit View Favorites Tools Help e PT gt Google z Bo search web Gr 100 blocked Fl tutol Ed Options 4 M e city M AN state M County
40. uested by the user through his Web browser and is sent there from our Web server for display Then user can use the controls on the web pages to send further queries to Web server Web server will respond to these queries and send result web pages to user s Web browser Tier 2 is the Functional Module This level actually processes data It consists of several separate modules running on an application server This tier may be multi tiered itself In the existing DNGP this tier consists of Apache web server Mapserver4 0 PHP programs and C programs Tier 3 is the Database Management System DBMS A DBMS on a host computer stores the data required by the middle tier In DNGP this tier is an Oracle 91 database management system in which we store our image data The existing DNGP website which was built in an ad hoc manner has some functional and performance drawbacks To improve this website we will produce a new software design for DNGP s Tier 1 and Tier2 We expect to integrate JavaScript into Tier 1 of our project and we will re implement the current PHP programs in Tier2 reusing existing code when possible In addition we will seek feedback from our clients about the existing DNGP implementation and use this feedback to determine any additional requirements or features that need to be added to DNGP 4 After the implementation is completed we will test our new system internally for correctness and then we will do satisfaction testing wit
41. ursor on the DNGP ACCOUNT Button 2 A drop down menu appears with the Edit my account change my password and change my secret question entries 3 Make the selection and click on it to go to desired function Edit my account 1 Click on Edit my account link 2 Anew window pops up showing your current account information You can change the information in the window Change my password 1 Click on change my password link 2 A new window pops up to let you create a new password but it requires you to enter your current password Change my secret question 1 Click on change my secret question link 2 Anew window pops up to let you change your secret question and answer which would be required if you forget your password 51 APPENDIX B Source Code The source code is not printed It is stored in the accompany Compact Disk labeled as Digital NGP Version 3 0 3 52
42. w AOI viewAOL php hide php Implementation Get map extension from homepage Set session information about map extension Create the new image Refresh the image on homepage 29 Module Create AOI create AOI php hide php Implementation Get User_ID AOI name and current map extension from homepage Search if the AOI name exists in the database Translate map extension to certain format Input AOI name and map extension to database Set session information about AOI list Refresh AOI list on homepage Module Logout logout php Implementation Unset session information about User_ID Permission AOI list Refresh menu bar on homepage Refresh AOI list on homepage 4 2 EXAMPLE SOURCE CODE The example source code below is from one program of login module login php The Login procedure is activated when the submit button is clicked on the NGP home page form The parameters passed from this home page are the user s name and password which are captured and stored in local string variables The following paragraph shows the part of code to get username password from homepage username _POST username 30 Spwd _POSTI passwd Encrypt password Scryptpwd md5 Spwd An MDS signature for the password is computed Then a query is constructed and submitted that search the administrative database and authenticate the user The following code is for database connection and query to get user ID permission and user s first name
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