Polar DALI User Guide
Contents
1. Termin First enter your personal login in the Access ID toolbox at the top of the page Then you can adjust the browsing parameters i e the acquisition date range the cloud coverage percentage and the quality criterion The central part allows you entering the coordinates of your polygon of interest Finally you can select the output format chosen to display the HRS quick looks corresponding to your request For each box you can display the on line help by left clicking on the B icon Polar DALI User Guide Page 5 15 e SPOT IMAGE cnes Ki 2 Selecting criteria With Polar DALI you have the possibility to browse for HRS quick looks by defining the parameters that fits your need Thus you have to adjust Acquisition date E o From 2007 06 04T 00 00 002 E 2007 10 31 T 00 00 00 You can define an acquisition date slot in UTC time By typing the chosen date in each start and end date box The date format selected for this application is the second edition ISO 8601 2000 For example June 25 2007 11 16PM 32 seconds is written in the standard notation as 2007 06 25T123 16 32Z Z is added at the end of the dates and hours to mean that they are in UTC time For further details see http www cl cam ac uk mgk25 iso time html By opening the calendar Ei and left clicking on the chosen month and day of acquisition From 2000 05 03T 00 E May 2000 fem tect KML Polygon To ECT2. 42 68 36 68 36 62 42 62 42 68 y 42 62 36 62 Users have to note that multipart polygons as well as polygons with holes are supported No transformation is done on WKT coordinates oince Dali longitudes range from 180 to 180 users must supply WKT ROI split according to this convention otherwise search result could be incomplete For instance a polygon like POLYGON 178 45 182 45 182 40 178 40 must be defined as MULTIPOLYGON 180 45 178 45 178 40 180 40 178 45 180 45 180 40 178 40 ISO 19107 Polygon The ISO 19107 format allows defining a polygon by a character string containing pairs of longitudes latitudes separated by commas Pairs are separated by spaces Exemple REGION OF INTEREST Select 15019107 Polygon C File TextBox Parcourir 42 68 36 68 36 62 42 62 Polar DALI User Guide Page 9 15 CENTRE MATIONAL DY TURES SPATIOLES SPOT x IMAGE Constraints on the desired polygon Must not have intersecting sides Must not have identical vertices even consecutively Must have 3 or more different vertices neither a simple line nor a point is allowed longitudes values increase towards East the beginning or western point of a polygon side longitude value must be lower or equal than its end or eastern point and conversely towards West extension in longitude 180 180 excepted when crossing 180 meridian see below Extension in l
3. Mon Tue Wed Thu Fri Sat Sun Je O TextBox MAX CLOUD COVEE AE S rs JKoronaiMes Parcourir i0 411 12 24 25 26 MIN QUALITY RATIN 31 Select Excellent v Cancel Note that the lack of a bound means the use of the entire slot each one of these dates is optional For instance if the End isn t provided search will be done since the Begin date until today Cloud coverage percentage MAX CLOUD COVEE 2 RR The cloud coverage percentage is a value ranging from O to 10096 fully cloudy When looking for a HRS pairs on a specific area we recommend making first a search with the best quality rating and the least cloud coverage i e a 096 score Then if the search result is null or if it does not match with your need you can progressively increase the cloud coverage criterion for example 1096 2596 50 and 100 The more the image is cloudy the less a realisation of a SPIRIT product will be possible Polar DALI User Guide Page 6 15 s SPOT cnes IMAGE Quality rating MIN QUALITY RATING Select Unusable I This criterion specifies the image minimum technical quality quote The available values are Excellent Good Poor and Unusable We recommend trying either Good or Excellent to insure acceptable SPIRIT products correlation scores 3 Region of interest can be 15 000 sq km maximum Polar DALI allows you browsing HRS quick looks in a defined area of interest selectable in the central part of the in
4. Order Form HRS Glaciology Product REGION OF INTEREST ACQUISITION DATE v From 2008 10 25700 00 002 Select SL Po ygan to 2009 02 26100 00 Oz lima Orie O TextBox i Parcourir MAX CLOUD COVER PERCE e elle o ale 2026 01 17 T19 3 E 22732 minsin shino MaxShitt Shite Cloud wiwat quotes BADEBADEAACEBBBD Scene quality quotes EEEE A21 code 5054570090147 19249525 DatastipNumba 06020727 SAT Shino 16348 Ef 7854 162 44 E an amp tr 159 45 E 0 27 Satellite Epots Scene Center Dale 2006 01 17T12 22257 nare 15856 E 00NZY 4595 E 1 094904 x Spwctal mode s AO iedenze angie 22 732 Minshit Urahittable Cloud t adi a Maxshift Unzhifable Choud cower queles AAACARACAARARAAA Polar DALI User Guide Page 11 15 S POT IMAGE A full description of the scene is available on the right of the screen AP code SOS45 70080117 19243525 D ataStrip Humber an20727 SAT Shift Satellite Spots Scene Center Date 2008 01 17 T19 24 352 iain E 15845 E f 79 51 S 152 2M E 7 S0 50 S 158 35 E 80 27 S 1586 5B E S0903 5 158 37 E 81 04 5 Spectral made s Incidence angle 22 732 Arcwiew world File hdinShift Unshittable eats REN hax hift Unshiftable Claud cover quotes AAACAAACAAAAAAAA Scene quality quates EEEE It contains the following relevant parameters
5. 1 Sightseeing 3 Start your Goog Rename here C lick on ar Save As Lo default Google Earth defau Share Post Edit snapshot a nex Email E d Temporary Places Snapshot view Properties REGION OF INTEREST Select KML Polygon C File TextBox Parcourir lt xml version 1 0 encoding UTF 8 gt zkml xmlns http earth google com The WKT Well Known Text syntax is maintained by the OGC Open Geospatial Consortium http www opengeospatial org The text representation is an ASCII text formatted string that allows geometry to be exchanged in ASCII text form A useful summary can be found here http en wikipedia org wiki Well known text Only polygons and multi polygons are relevant and supported No extra knowledge is required People eager to fully understand WKT can refer to OGC web site where a Backus Naur grammar specifying its formal generation rules is available The figures below display two examples the first one defining a single polygon the second one a multipolygon Polar DALI User Guide Page 8 15 amp SPOT f cnes IMAGE gt a WKT Polygon REGION OF INTEREST Select WKT ROI C File TextBox Parcourir POLYGON 42 68 36 68 36 62 42 62 42 68 gt a group of MultiPolygon with two Polygons Select WKT ROI C File TextBox Farcourir MULTIPOLYGON 54 69 48 69 48 63 54 63 54 69
6. 6 N Areviews worldFile Cloud Mask S POT IMAGE cnes CENTRE MATIOMAL P TUXCS SPATIALIS Table of contents Cl COP VOTED EET TE T 2 uc ipei iri eC 3 LTEM re M 3 Polar DALI a simple way to access HRS polar views cccessssccccceesseesessneeeeeeeesseessaees 3 The SPIRIT Product eeeseeseeseeeeeeseeeee nennen nennen nennen nnne eene ennt nnn nsns eene nnne 4 Accessing Polar DALI aee sseeseesedeue ee seseue ee ue ue eae epus Ves aee Sea 9 e PN E VEUNE PRAE EE SP SEMINE V PPE 4 Browsing the HRS Archive cce eeeeekou eS esa Fea E kv s Te rEF ORE COR EXER EUER ERE E FPE SEP EIE Eee ES ae EE eY 5 T ACCESS WIIG OW 2 csceeseeseseseessve e Hoe suero EEERS NER REEEEEE SER EEEEERER NIRE E T TEE RETE ESH CURIE e dee a ENS dE Vega 5 Be SeleC UI CERERI saaa 6 PC GUA STOOD CAG oa sisaosu oe sanesasnnasagnsessacmaneaananataacaaaaneagnenanansiotanetaannataactaaanetaaaiaitocnnmenmanssnaqssaes 6 Cloud coverage percentage sss eene eene eene nnne nennen eene eene enn nnns 6 SUECIAE 7 RONO METOS n serene eee 7 ENEON GO assesses dents ste eta diaeta et eben a netos dede oa eee 7 BN TT 8 ISOLE EE uc E H 9 V ISUAMS INS HRS Couples eibi causes sewesnsehiccsusevswcussabsusnssevarsussevacenseoseasieusesneasiaps 11 L5etuns the output Formal wssccccccccctacadecessceseaacsscacoscaccccececed
7. The A21 code which allows identifying each stereoscopic pair and is necessary to fulfil the SPIRIT DTM order form he acquisition date in UT time The gain used he relative latitude longitude position in sexagesimal degrees centre and corners The cloud note Each scene is divided in 16 elementary cells with a corresponding note varying from A Excellent to E Unusable The scene quality note set to U Unusable P Poor G Good or E Excellent according to its radiometry its optical parameters etc The Cloud Mask by left clicking the corresponding link example below The Arcview or MapInfo File downloadable by left clicking the corresponding link which allows exporting the results in any GIS software Polar DALI User Guide Page 12 15 4 SPOT ff cnes cae 1 CENTRE MATIOMAL PPETUXES SPATIALIS Google Earth display The research results can be also displayed by using the Google Earth browser by ticking the KMZ option Once the process has extracted the stereoscopic pairs of interest for the desired area a toolbox allows choosing to launch directly Google Earth and display the result or save the KMZ file in an appropriate folder Under the Google Earth environment the user can dynamically adjust a temporal window in width and position in order to show the images corresponding to a defined range of acquisition dates The figure below shows an example on the Chugach Mountains and Saint Elias mount
8. aastesesasacasescessstunsceveesssenveerseeevenae 11 P E E A T EE E 11 TN S EEEE E E EE E 11 Goole E nip 13 Ordern a SPIRIE prodici ose cip e ERERNOFSREPESER S SVERENESSEEE EX VE EURO PUDE aei 15 Polar DALI User Guide Page 2 15 SPOT fae IMAGE cnes CENTRE MATIOMAL DY TURES SPATIALES The SPIRIT project SPOT Image and CNES supplied satellite data for the international Polar Year research programmes Earth observing satellites are mapping the poles to provide scientists with a more precise picture of how glaciers are changing and to help them understand the impacts of climate change on our planet Spot Image and CNES joined the SPIRIT project SPOT 5 stereoscopic survey of Polar Ice Reference Images and Topographies in partnership with French survey the French mapping agency IGN and the LEGOS space geophysics and oceanography research laboratory During two years from 2007 to 2009 an archive of SPOT 5 HRS images was compiled over polar ice in order to produce DTMs and ortho images The project has three main purposes 1 Realise a massive coverage of about 2 5 millions km of polar areas including Antarctica Greeland Alaska Northern Canadian Islands Patagonia etc 2 Make this archive available for browsing to the scientific laboratories upon acceptance from the CNES by the mean of a dedicated interface Polar DALI 3 Deliver SPIRIT products to the Scientific Community laborato
9. ains in Alaska The temporal window is set to the 09 09 2007 27 02 2007 range z y E TH E o Mosis dass ted mI P 9 SER 2007 1527 SEP 2007 yg Ce a Polar DALI User Guide Page 13 15 4 SPOT f cnes IMAGE CENTRE MATIOMAL PPETUXES SPATIALIS Left clicking on the ti button allows displaying the corresponding scene with all its corresponding parameters already explained above A21 Code 54702250709132048362S Spectral mode DataStrip Number 4847411 Incidence angle SAT Shift MinShift Satellite Spots MaxShift Center Date 2007 09 13T22 48 35Z Gain Cloud quotes AAAAAAAAAAAAAAAA Quality quotes Polar DALI User Guide Page 14 15 e sor f IMAGE cnes E CENTRE MATIONAL OC TURE Ordering a SPIRIT product Once a stereoscopic pair has been identified to present relevant information for the laboratory project a SPIRIT order form can be downloaded on the Polar DALI main page http polardali spotimage fr 8092 IPY dalisearch aspx and sent back to the SPIRIT project team by e mail on hrs_polar spotimage com The user licence of the SPIRIT product is joined to the order form and must be signed by the laboratory After acceptance from the CNES Spot Image will exchange if needed technical information with the laboratory Then if accepted a confirmation e mail will advise the laboratory of the beginning of the SPIRIT production process The SPIRIT products are delivered through ftp server The link is g
10. and the SPIRIT product must first contact SPOT Image at hrs polar ospotimage com in order to get free access to Polar DALI The users will receive by e mail their personal login It allows connecting to the application and identifying the laboratory each time a Polar DALI session is opened It is personal and cannot be given to third party organization or individual Any kind of loan divulgation or publication of this login is prohibited and can lead to the direct suppression of your Polar DALI access and impossibility to benefit the SPIRIT products To connect Polar DALI open your internet browser and type the following address http polardali spotimage fr 8092 IPY dalisearch aspx You will be immediately redirected towards the Polar DALI home page Polar DALI User Guide Page 4 15 i amp g Browsing the HRS Archive 1 Access window Once you have entered the correct address you are redirected to the following Polar DALI home page PolarDali Mozilla Firefox Fichier Edition Affichage Historique Marque pages utils E WP e 5 Gh Lj http 194 51 20 198 8092 IPY DaliSearch aspx 7 gt gt Welcome to Polar Dali The Spot image Polar HRS Scene Portal v From 2007 10 01T00 00 002 y Select KML Polygon iv j v To 2007 10 23T 00 00 00 Grile TextBox MAX CLOUD COVER PERE D Users JKorone Mes Parcourir ArcView8 TWorldFile GIS Mapinfo65TabFile GIS
11. atitude 90 90 a polygon can cross 180 meridian Would be it is necessary to express longitudes are in the range 0 360 or 360 0 to follow the rule longitudes increase toward East a search area must not encompass the North or South Poles geodesic points 0 90 Notice that 4 89 9 latitudes are allowed but of limited interest due to Spot orbit characteristics Spot HRS scenes latitudes range from 81 to 81 degrees Polar DALI User Guide Page 10 15 f SPOT f cnes dina NE CENTRE MATIONAL ETUDES SPATIALES Visualising HRS couples 1 Setting the output format The file containing the request result can be formatted in two ways KMZ i e a zipped or compressed KML file It allows user to display directly the Spot HRS datastrip footprints using the Google Earth browser HTML providing a descriptive web page result In addition GIS files MapInfo 65 TABFile or ArcView 81 WorldFile are provided to display HRS quick looks within the ArcView ArcMap from ESRI or Mapinfo softwares KMZ e HTML ArcViews TWorldFile Gls O Maplnfo65TabFile GIS Once all the criterions have been typed left click on the Search button to display the results 2 Search results HTML display Ticking the HTML option allows displaying the different HRS scenes available on the desired area directly under the Polar DALI research window Left click on the scene to display it in full size HRS Glaciology Product
12. iven by e mail to the laboratory as soon as the product is available For any further questions please contact the SPIRIT project team via hrs_polar spotimage com Polar DALI User Guide Page 15 15
13. o cCnes CENTRE NATIONAL D TUDES SPATIALES Polar DALI User Guide gt Welcome to Polar Dali Ps The Spot image Polar HRS Scene Portal SPOT Ai LTS SPIRIT Product SPIRIT Products list kmz files over Alaska SPIRIT Product Order Form PDF or MS WORD format over Antarctica over Greenland Polar DALI User Guid over Iceland Serouice over Narth Canadian Islands over Russian Arctic over Svalbard RES o gt OUTPUT FORMAT v From 2010 02 22T00 00 002 ER Select KML Polygon m 9KMZ To 2010 02 23T00 00 002 ER File O TextBox OHTML ArcViews 1WorldFile GIS MAX CLOUD COVER o MapInfo65TabFile GIS 777 1 00 Satellite Spot5 Scene Center Date 2007 08 20T18 23 51Z Gain 3 Spectral mode Incidence angle 22 732 Arcview worldFile MinShift ShiftD Cloud Mask MaxShift Shita Cloud cover quotes AAAAAAAAAAAAAAAA Scene quality quotes EEEE 83 46 O 76 26 N 80 18 O 75 44 N 82 42 O 75 53 N 85 08 O 76 00 N 81 42 O 75 20 N A21 code 507114307082018240025 DataStip Number 4800168 SAT Shift Satellite Spot5 Scene Center Date 2007 08 20T18 24 00Z Gain 3 Spectral mode S Incidence angle 22 732 MinShift Shift MaxShift Shita Cloud cover quotes AAAAAAAAAAAAAAAA Scene quality quotes EEEE 85 04 D 76 01 N 81 38 O 75 21 N 83 58 O 75 29 N 86721 O 75 35 N 82 58 0 74 5
14. ries Further information on http www spotimage fr web en 1587 international polar year php Or http www cnes fr web 5825 cnes and the international polar year php Polar DALI a simple way to access HRS polar views Polar DALI is a web application allowing users to browse and select Quick looks 120m resolution from HRS images according to Cloud coverage ratio Area of interest KML Polygon WKT ROI or I8019107 Polygon Acquisition date It requires a valid login at hrs_polar spotimage com Once investigation has been led by the user and HRS pairs of interest have been found the opportunity is given to fill an order form to ask for a SPIRIT Product succinctly described below Polar DALI User Guide Page 3 15 m cnes MEER The SPIRIT Product The SPIRIT product is composed by A set of different DTMs assuming different sets of correlation parameters he relative correlation masks One HRS orthoimage The SPIRIT product is only available for segments published in the Polar DALI database over a selected area 15 000 sq km maximum for a single date stereo pair fusion between DTMs is not assumed The original HRS stereo pair is not delivered Accessing Polar DALI Polar DALI is a web application allowing browsing the stereoscopic pairs acquired by Spot 5 HRS in the framework of the SPIRIT project over the areas of interest approved by the CNES The laboratories interested in using this interface
15. terface The polygonal search area can be set using the following formats KML Polygon WKT ROI and ISO19107 Polygon REGION OF INTERES ORI Undefined KML Falygon WET ROI ISQ13107 Pol According to its format the polygon can be directly uploaded as a file or typed in the textbox with the appropriate syntax KML Polygon The KML polygon 15 000 sq km maximum needs to be first drawn on the region of interest using the polygon tool of Google Earth w Tools Add Help Ta e 2 4 Imm m E 1Businesses Directions Google Earth New Description stye Color view Atitude Description Polar DALI User Guide Page 7 15 cnes CENTRE MATIONAL DY TUDES SPATIALES SPOT f IMAGE Then save the KML description in a file and upload it by ticking the File option see 1 in the figure below or paste its description in the text area by ticking the TextBox option see 2 in the figure below 1 File radio button a i id Places e Em Nuuk Cut ie 9 id Copy Nd Products E Je Sightseeing E Start your Goo Rename here C lick on LE default Google Earth defa Share Post Edit snapshot a ne Delete Email REGION OF INTEREST Select KML Polygon File TextBox DAPalygon kml Parcourir WKT ROI 2 TextBox radio button zm gt oa Places at R Gironde iv vl C Nuuk 2 O S hrs Bac E Products a
Download Pdf Manuals
Related Search