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Using LIDAR data in the system
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1. Sf Split into LAS files Button to save parts of LIDAR data corresponding to created splitting into separate LAS files 8 Build DEM Button to transform all opened files with LIDAR data into one DEM file area Button to transform selected area of LIDAR data into DEM 3 3 Opening files with LIDAR data To open files with LIDAR data in Load LIDAR data window perform the following oper ations 1 Push the button Open window opens PHOTOMOD 5 21 Using LIDAR data in the system 2 Select one or few LAS format files and push the OK button LIDAR data from selec ted files is loaded but not displayed in the Load LIDAR data window working area See description of LIDAR data importing in Section 3 4 E Transform into DEM option is available at once after opening files with LIDAR data see descrip tion in Section 3 7 It allows to save time on importing LIDAR data for displaying in the Load LIDAR data window 3 4 LIDAR data displaying Push the 8 button to show of opened LIDAR data in the Load LIDAR data window Process of LIDAR data loading which which may consume a long time LIDAR points are displayed in working area after the completion process of LIDAR data loading Large volumes of LIDAR data are thinned out for display The thin out coefficient displays in the Output points per point uneditable field of Load LIDAR data window System provides the following features to control the display of lo
2. To saaaHHbim pasmepam Mo uactan To konmyectsy Touek Makc uncno TOYeK B bavine HapesKH 250000 OGwee yncno Toyek 26840865 OK OTmeHa Fig 2 Splitting settings window Splitting type Settings By part size Splitting sheet s size along X and Y axes in meters By parts number Number of splitting sheets along X and Y axes K points number Max number of LIDAR points per single splitting sheet in the Max points per single file entry field ec Use the info in Bounds panel and Total points quantity field for the splitting settings as sessment 4 Push the OK button Splitting settings window closes Sheet frames for selected file are displayed in Load LIDAR data window Fig 3 Use the 2 button for turning on off the sheet frames displaying mode PHOTOMOD 5 21 Using LIDAR data in the system 3arpy3ka nugapHbix aoe ph en a to de SE IAEE Fig 3 Splitting sheets displaying 5 Push the button to save the LIDAR data from splitting sheets in the separate LAS format files Save window opens Specify the folder of active profile and left part of the name for creating the LAS format files Push the OK button The file is created for each sheet The name of this file is created from the specified initial part the filename of splitting of LIDAR data and the serial number in accordance with the number of the splitting sheets 3 7 Building of DEM The Load LIDAR data window
3. 4 DEM parameters window 4 Define folder in the active profile and filename of output DEM in the Save window Push the OK button The process of DEM building starts The created DEM is saved in the specified file and displayed in 2D window when the process completes Fig 5 PHOTOMOD 5 21 Using LIDAR data in the system PHOTOMOD Npoekt Bnok OpveHtHpopaHne YpasHnBakne BexTopa Cetka TIN Matpnuasbicot Peaaktmposaine CepsHc OkHa Cnpaska Bbixog E test Matpnya BbicoT 3arpy3ka MM APHbIX AHHbIX loj xj ood a Ba de Se Ee IEF Bae Be ae Fig 5 Conversion of LIDAR data to DEM lt Coordinate system of the DEM created from LIDAR data must correspond to coordinate system of user s project The DEM gt Transform to another coordinate system menu command use for recalculation of DEM coordinate system 10
4. AR points decreases E Push the button to display of all loaded LIDAR points Push the f button to save the LIDAR data of selected area in the new LAS format file The Save as window opens Specify the folder and name of new LAS format file Push the OK button to save the data of selected area in specified file in Section 3 7 3 6 Splitting The Load LIDAR data window provides the splitting into sheets of loaded LIDAR data Splitting feature allows to split all loaded LIDAR data and save in the separate LAS format files Using of splitting feature is optimally if the source LAS formate file contains a large amount of LIDAR data Splitting feature allows to select one or another parts of source LAS format file for DEM building To split the LIDAR data into sheets do the following actions 1 Push the button in the Load LIDAR data window to open one or few LAS format files for splitting 2 Push the button in the Load LIDAR data window to load LIDAR points 3 Push the button to specify splitting settings Splitting settings window opens Fig 2 In the list on the left select the one of opened files with LIDAR data for splitting In the Splitting type panel select the splitting type by check box and specify the parameters PHOTOMOD 5 21 Using LIDAR data in the system Napametppi Hape3kn G x T paHnubi Cesep 381042 69 M 3anaa 6232341 7 M Boctok 6238292 7 M tor 75646 SF m Trn Hapeskn
5. Digital Photogrammetric System ae ry a Version 5 21 USER MANUAL Using LIDAR data in the system amp RACURS PHOTOMOD 5 21 Using LIDAR data in the system Table of Contents DAB OUT eaa a e a ued eae LER edad de ie eae ee a aa a gS le Coda ec head 2 2 Import OF LIDAR data ioraa an a bac sean teanea sa gadee bsp ctagd2 is Pande a a aaa aaa be Dea 2 3 Importing the LIDAR data into the system 0 00 02 eeee eee nett eter tee e eee ee sete aaeeeeeeaaeeeeeaaneeeeeaaeeees 2 9 1 WOEKTOW 5 coarae araea ia oaaae a geteaea An Meng EEEE AEDE AATE RAA a AA OARE Aaa 2 3 2 Load LIDAR data window cccecceeeeeeeee eee ce eeee cece eeeeeeaeeeeeaeeecaeeeeaeeeeseeeeaeeeeeaeeesseneeaes 3 3 3 Opening files with LIDAR data 000 2 eeee cent ee eee e teeter etter eee aa tree ee aaeeeeeeaaeeeeeaaeeeeeeaaeeees 4 3 4 LIDAR data displaying eleleri tankinis eniten aea edad a eNEAN de idee nel TE MALEENA Naa 5 3 5 Selection of loaded LIDAR data assirinati a aaia eaaa adna EA Aaaa Ei ita 6 SO SPIN e etaeta Ea Ee cae Malan Pea haw eee hee ee eee ee 6 327 Building Of DEM Taaie a E AAAA atte sith dines apo hapieaeads ste paacde eae Mae eae 8 1 About The current User Manual is intended to review the import of LIDAR data for use in the PHOTOMOD system Main part of document contains the description of the loading viewing and processing of LIDAR data modes 2 Import of LIDAR data Import of LIDAR data is provided to enable usi
6. aded LIDAR points in the Load LIDAR data window Use the mouse wheel for scaling Initially push the amp button to rotate and then move cursor in the working area with the pressed left mouse button Initially push the A amp button to stretch along Z axis and then move the cursor vertically in the working area with the pressed left mouse button System provides the following modes for coloring LIDAR points Height coloring mode e Gray scale coloring mode RGB coloring mode W Coloring mode to accordance with serial number of reflected pulse per one point Coloring mode to accordance with number of reflected pulse per one point E Coloring mode to accordance with aircraft scan direction when sounding the earth surface i Coloring mode to accordance with edges e Coloring mode to accordance with objects classification PHOTOMOD 5 21 Using LIDAR data in the system 3 5 Selection of loaded LIDAR data The Load LIDAR data window allows to select any part of loaded LIDAR data for viewing saving in separate LAS format file and or transforming to DEM To select the area do the following actions 1 Push the 4 button to enable the area selection mode 2 Stretch a rectangle with the pressed left mouse button Displaying mode of current of selected area only are displayed in the working area Depending on the size of selected area the thin out coefficient of LID
7. ng LIDAR data in the system This feature allows to convert the LIDAR data to DEM which is saved into the file of active profile LIDAR data it is data obtained by lidar systems which are installed on aircraft Aerial LIDAR systems are represented by laser scanner for remote sensing of the earth s surface The principle of lidar survey consists in pulsing from the laser transmitter to remote objects signal registration and the processing of the reflected signal Lidar data are delivered in LAS formats files LAS format files include the XYZ coordinates and attributes of the laser reflection points for example serial number of the reflected pulse total number of reflections in a point object classification data Points of the laser reflection from the earth s surface which coordinates and attributes are contained in the LAS format files will be called the LIDAR points in this document ation 3 Importing the LIDAR data into the system 3 1 Workflow Importing the LIDAR data into the system consist of following basic operations 1 Start the system with or w o project 2 Use the DEM gt Load LIDAR data menu command to open the Load LIDAR data window PHOTOMOD 5 21 Using LIDAR data in the system 3 Open in Load LIDAR data window one or a few LAS format files with LIDAR data and convert its to DEM DEM is saved in the file of active profile and displayed in 2 D window 4 Select the DEM gt Transform to another co
8. ordinate system menu command to put the coordinate system of building DEM to accordance with project coordinate system 3 2 Load LIDAR data window Load LIDAR data window is used to transform the LIDAR data to DEM It opens during the selecting of DEM Load LIDAR data menu command aM gapHp IX Lei adla a tas de Se ER Be 2 ah Be e R PPE ck a Fig 1 Load LIDAR data window Load LIDAR data window contains the following GUI elements e tool bar for loading viewing and LIDAR data preparing for transforming to DEM see short description Table 1 e working area for LIDAR points viewing which contains in lower left corner the direction axes of the coordinate system of laded LIDAR data Table 1 Toolbar of Load LIDAR data window Purpose amp Open Button for opening the LAS format files with LIDAR data Output points per point field Field displaying number of source LIDAR points per one point shown in thinned array in the Load LIDAR data window PHOTOMOD 5 21 Using LIDAR data in the system GUI elements Purpose 9 Display Button for loading all opened LAS files and displaying LIDAR points in working area Elevation Button for displaying LIDAR points in coloring mode to accordance with its Z coordinate values Intensity Button for displaying LIDAR points in gray scale mode if source LAS file contains such data Qi RGB Button for displaying LIDAR points in RGB mode if source LAS file contains
9. provides the DEM building from the opened LIDAR data or selected area of loaded LIDAR data Perform the following actions for DEM building 1 Push the button in the Load LIDAR data window for opening one or several LAS format files 2 Define the creation area of DEM e Building of DEM for all LIDAR data of opened LAS format files Push the button The DEM parameters window opens PHOTOMOD 5 21 Using LIDAR data in the system lt r Loading of LIDAR data into the window using the button is not a prerequisite in case of the DEM building for all opened LIDAR data e Building of DEM for selected area of LIDAR data Push the button for loading the LIDAR points into the window work area Push the 4 button and stretch the rectangle of selection The LIDAR points of selected window opens 3 Estimate boundaries Fig 4 size and calculated number of cells for output DEM in the DEM parameters window Specify the cell size of output DEM in the X Y fields in meters Automatic recalculation the number of cells is performed while change the cell size Push the OK button The Save window opens Napametpbi maTpuubl BbICOT q xj T paHnubr 5 Cesep 4715193 56054502 3anaa 272254 829715154 m Boctok 275674 591095802 lOr 4714389 37458672 WrpHna fa4i9 76138064 M BeicoTa fa4 1a5958294 M Pasmep ayerikn Pasmep A4e KH MATpHUbI BbICOT X M Yncno ayeek x 3420 vy oY M y 805 OTmeHa Fig
10. such data E Return number Button for displaying LIDAR points in coloring mode to accordance with serial number of reflected pulse per one point if source LAS file contains such data Number of returns Button for displaying LIDAR points in coloring mode to accordance with number of reflected pulse per one point if source LAS file con tains such data S94 4s Scan direction Button for displaying LIDAR points in coloring mode to accordance with aircraft scan direction when sounding the earth surface if source LAS file contains such data be Edge Button for displaying LIDAR points in coloring mode to accordance with edges if source LAS file contains such data 4 Classification Button for displaying LIDAR points in coloring mode to accordance with objects classification if source LAS file contains such data amp Control Button to enable rotation mode and rotate LIDAR points AG Scaling along Z axis Button to enable stretching along Z axis 4 Selection Button to enable selection of any part of LIDAR points 2 Show all Button to enable displaying of all loaded LIDAR points Button to enable displaying of LIDAR points within selected area Save selection into LAS Button to save the LIDAR data from selected area into new LAS format file 9A Splitting settings Button to split the loaded LIDAR data 29 Show splitting grid Button to eneble disable displaying of splitting grid
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