VTTileGrabber-E-01-0..
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1. ee Visio Terra VT Tile Grabber za R S sog t i prepared by checked by approved by reference VT P053 SUM 002 E issue 1 revision 0 date 05 11 2008 page 1of9 Tile Grabber User s Manual name function company Serge RIAZANOFF Project Manager VisioTerra Serge Riazanoff visioterra fr Gr gory MAZABRAUD Engineer VisioTerra Gregory Mazabraud visioterra fr Serge RIAZANOFF Project Manager VisioTerra Serge Riazanoff visioterra fr date signature This document discloses subject matter in which VisioTerra has proprietary rights Recipient of this document shall not duplicate use or disclose in whole or in part information disclosed here on except for or on behalf of VisioTerra to fulfil the purpose for which the document was delivered to him reference VT P053 SUM 002 E Tile Grabber issue 1 revision 0 date 05 11 2008 Visio Terra User s Manual page 2of9 DOCUMENT STATUS SHEET Issue Date Comments Author 1 0 05 11 2008 First release S Riazanoff This document discloses subject matter in which VisioTerra has proprietary rights Recipient of this document shall not duplicate use or disclose in whole or in part information disclosed here on except for or on behalf of VisioTerra to fulfil the purpose for which the document was delivered to him reference VT P053 SUM 002 E Tile Grabber issue 1 revision 0 a date 05 11 2008 Visio Terra User s Manual page 30f92. M 002 E Tile Grabber issue 1 revision 0 r date 05 11 2008 VisioTerra User s Manual page 4of9 1 PURPOSE VTTileGrabber is an application enabling to capture the information displayed during your session on a virtual globe In its first release WITileGrabber manages the Google Earth virtual globe The data displayed during a session include raster and vector layers placemarks that are provided by the user contributors on the net or by the virtual globe itself Google Earth Plus Fidis Mocilier Afichege Quie Ajader Aids G Mee a auaa2e EO D gt vitiecranas Bouncing bor vitecredpe cress e SS ity Layer 5 Saint Martin de Seignanx Saint Barth lemy 5l Bese de donn es primare O hilos g ographiquss du vis rE E Ross L Gy bites co From rez ot genes pO Resets O Oe Guers m Senstdesien merck EO P Lisa utters 20 B Puz iD D ret VTTileGrabber enables user to select the area of interest defined by the upper left and lower right corners the ground sampling distance spatial resolution the format of the output image EB ViTileGrabber the projection of the output image ie Optoma 7 7 Settings the name and location of the output image file longitude latitude UpperLeft Corner 8 711022 dd 0 627557 dd When parameter values are changed VTTileGrabber checks swerrignt corner ES oo the validity of the parameters the consist
3. TABLE OF CONTENTS L PURPO Eae T E ETEA 2 PRCE a E E A 2 1 STEP l TILE CAPTURE anin E EEEE EE IREE EEEE 22 STEP 2 CONSTRUCTION OF THE OUTPUT IMAGE ccccecssceccecscecescececeusescscseececeusescseesesescsessucensens 3 PROCESSING PARAMETERS ccccccsccscccccccccccccccccccecccccscccccccceccecceccecceccscescesceccsccsscescescesceccecccccscsccsscesccccsceees 3 1 SETTING THE BOUNDING BOX UL LR 0 cccccc ccc cecceccecceececceeceecescceeceseceesesceeeeeueeeseucesceeseseeeesenseeeens 3 2 SETTING THE GROUND SAMPLING DISTANCE GSD cccccccccecceeceeccecceccccesceeceeceseeeceeceseeeeeeeeeeseness 3 3 SETTING THE OUTPUT FORMAT sinicccssoncseccdjacccaracencadaoagnet eens anesoungaaenoxnaaonnadundens extanneneanieratsebaauseoaiqunceanes 3 4 SETTING THE OUTPUT PROJECTION oiseciccscveccssscvessveecoesctsusbereedssbecesdscuesesdectesevesvessucdstveecdsswacesteuecordaebes 3 5 SETTING THE OUTPUT FILE NAME cccsscscssccscsccscevceescesccscescsccsesccscscecssesceusecsecssessescestecsscessscessecsvees 3 6 CROP PARAMETERS SETTING viccesre treere EE E EEEE EATEN EEE TEENI 2d SAVING PARAMETERS orrak EE E E E EAEE E This document discloses subject matter in which VisioTerra has proprietary rights Recipient of this document shall not duplicate use or disclose in whole or in part information disclosed here on except for or on behalf of VisioTerra to fulfil the purpose for which the document was delivered to him reference VT P053 SU
4. ency of them Gsp TO m compute elements of the processing and features of the Outputtormat ceon x output file These elements are printed in the Informations 0 Proiection UTM automatic x panel Output file D isioTerrattechnique P053_TOTAL_TILE_GR Informations Altitude giving at which elevation each tile will be stitwse et ee viewed to accommodate with the desired GSD oen e 25 ee ae Tiles giving the number of tiles required to capture the og whole bounding box UL coord long lat alt 8 711022 0 6275569168272035 0 0 LR coord long lat alt 8 71323197674553 0 6298259224105957 0 0 Done Output image size that is an assessment of the Info D VisioTerraltechnique P053_TOTAL_TILE_GRABBERIengineering map_U dimensions of the file to be produced Uncompressed size that gives the size of the output file computed from the assessed image size Getimage avon This document discloses subject matter in which VisioTerra has proprietary rights Recipient of this document shall not duplicate use or disclose in whole or in part information disclosed here on except for or on behalf of VisioTerra to fulfil the purpose for which the document was delivered to him reference VT P053 SUM 002 E Tile Grabber issue 1 revision 0 date 05 11 2008 page 5of9 a gt Visio Terra User s Manual 2 PRINCIPLE 2 1 2 2 Once the param
5. er File Options 7 Save parameters Quit Note This configuration file could be replaced by an other valid configuration file For example one of the map_projection_ULX_ULY_GSD conf attached to the produced image see section Setting the output file name Such a replacement would enable to restore the parameters to the values used to produce the image This document discloses subject matter in which VisioTerra has proprietary rights Recipient of this document shall not duplicate use or disclose in whole or in part information disclosed here on except for or on behalf of VisioTerra to fulfil the purpose for which the document was delivered to him
6. eters have been set see section Processing parameters and user has launched the acquisition pressing the Get image button the station shall be left to VTTileGrabber and no action shall be done on the computer no mouse actions no keyboard pressed VTTileGrabber will fully control the virtual globe application and the window manager VTTileGrabber will process the tile capture and the construction of the output image in two steps Work progress status is given in real time on the icon representing VTTileGrabber Step 1 is processed when the progress value is in the range 0 50 while the range 51 100 corresponds to the second step of the processing When the processing is completed no progress values are displayed anymore VTTileGrabber application may be restored and the Done message is displayed in its Log list User may collect the output file containing the image Step 1 Tile capture VTTileGrabber adjusts its view of the different tiles to set an overlay between adjacent tiles Once the tile is fully displayed streaming rate equal 100 VTTileGrabber captures the screen and clip the view according to the crop parameters set by the user see the section Crop parameters setting This clipped view is a tile which is saved in the temporary directory found in the configuration file VTTileGrabber conf Tiles of the area of interest are captured in the order shown here below Because p
7. he i Crop parameters of the Option menu zaul wee g oane This tool displays a grey level copy of the image in the virtual globe window and in which a red bounding box shows the present values of the crop parameters see the figure against In Google Earth it is possible to enlarge the image area removing the left panel that shows the layers Such enlargement is recommended To remove this panel deselect the Lateral bar in the Display menu or more simply just click on the Hide left panel in the tool bar For each one of the sides top bottom left and right the location of the red lines may be changed when the mouse pointer symbol is changed see the figure showing a zoom of the upper left corner ic anommj amoo f JE i Crop parameters may be set to 0 selecting the Reset crop values to zero in the File menu T moo i ono Crop utility I i This document discloses subject matter in which VisioTerra has proprietary rights Recipient of this document shall not duplicate use or disclose in whole or in part information disclosed here on except for or on behalf of VisioTerra to fulfil the purpose for which the document was delivered to him 3 7 reference VT P053 SUM 002 E Tile Grabber issue 1 revision 0 rai date 05 11 2008 Visio Terra User s Manual page 9of9 When the crop parameters have been adjusted the window shal
8. hic in which points are referenced by the longitude and latitude coordinates with reference to the WGS84 ellipsoid Plate Carr e in which points are referenced by the easting X and northing Y coordinates with reference to the mean unitary spheroid with a radius equal to the mean of the semi major and semi minor axes of the WGS84 ellipsoid UTM automatic Universal Transverse Mercator in which points are referenced by the easting X and northing Y coordinates with reference to the WGS84 ellipsoid The horizontal zone of the UTM is automatically computed from the longitude coordinate of the image center Setting the output file name Just before launching the capture user may set the name of the file that will contain the final image and the directory that will contain Jo ST ee this file ao Output format GeoliF Hie Options Help Settings UpperLett Corner 1 626658 43 579435 dd Catch UL A default name is proposed by VTTileGrabber To enable discriminating the various image captures this name is composed from the value of the UL coordinates longitude and latitude and from the value of the GSD The proposed name is refreshed in ee tases ZI Recent real time when user changes the value of these two parameters manic ee m 4 Voisinage r seau DS NTUSER DAT Syntax of the proposed name obeys to the following rule Nomdefichier map Geographic 1 525659 43579435 103m map_projection_ULX_ULY_GSD ext reer ue
9. l be closed activating the close button located at the upper right of the window JE After having adjusted the crop parameters it 1s recommended to save the values see the section Saving parameters Crop values shall be set only once the first time VTTileGrabber is used If parameters have been saved the same values of crop will be used each time VTTileGrabber will be run Saving parameters All the processing parameters that can be set by the EEE ETT user through the interface but also system fichier Edition affichage Insertion Format 2 parameters like the temporary directory are stored QR gH SA A gt Bo R in the VTTileGrabber conf file This file is stored topradding under the user directory rightPadding CAD d Setti d d h bottomPadding Documents and Settings wser and under the ieftpadding VisioTerra VTTileGrabber sub directory ULLongitude 6266578668817584 ULLatitude 57943524613079 334246 417522 0 0 Geographic GeoTIFF C DOCUME 1 GUEST LOCALS 1 Temp C Documents and Settings guest 400 LRLongitude Contents of the configuration file are shown in the Pirati tuge figure on the right and may be changed using csD whatever text editor Nevertheless the standard way to save the current values of the parameters is by TmpDirectory OutputFile using the Save parameters of the File menu e eii Appuyez sur F1 pour obtenir de l aide FR VT TileGrabb
10. rojection changes will be processed at the next step a border is left around the area of interest delimited by the bounding box Such a behavior leads to consider more tiles than the minimum required to strictly cover the area of interest Step 2 Construction of the output image The output image is computed in the projection defined by the user that differs from the projection used by the virtual globe vertical perspective in the case of Google Earth VTTileGrabber processes this projection changes that enables to mosaic the tiles without discontinuities This document discloses subject matter in which VisioTerra has proprietary rights Recipient of this document shall not duplicate use or disclose in whole or in part information disclosed here on except for or on behalf of VisioTerra to fulfil the purpose for which the document was delivered to him a gt Visio Terra 3 PROCESSING PARAMETERS 3 1 Setting the bounding box UL LR When they are know user may directly input the UL and LR geographic coordinates longitude and latitude in the dedicated text fields Values are expected in decimal degrees One shall pay attention to set the location of the lower right corner LR consistent with the location of the upper left UL LR shall be reference VT P053 SUM 002 E Tile Grabber User s Manual i r BAN Eg VT TileGrabber issue 1 revision 0 date 05 11 2008 page 6of9 File Options Help Setting
11. rous es rs Enregistrer Annuler This document discloses subject matter in which VisioTerra has proprietary rights Recipient of this document shall not duplicate use or disclose in whole or in part information disclosed here on except for or on behalf of VisioTerra to fulfil the purpose for which the document was delivered to him 3 6 reference VT P053 SUM 002 E ae S Tile Grabber pn ka ar ale VisioTerra User s Manual page 8of9 Where projection is a short identifier of the selected projection Geographic or UTM_automatic or Plate_Carree ULX is the longitude coordinates of the upper left corner ULY is the latitude coordinates of the upper left corner GSD is the ground sampling distance also called spatial resolution ext is the extension depending on the chosen format tif for GeoTIFF or TIFF and ppm for the PPM format Example map_Geographic_ 1 626658_43 579435_10 0m tif Parameters used to generate this image see section Saving parameters above are kept in an attached configuration file map_projection_ULX_ULY_GSD conf Crop parameters setting EJ VT lileGrabber Most of the virtual globes display decorations that user may want to remove in the output image VTTileGrabber enables user to define the portion of the view that is to be kept when capturing the tiles To define the clipping am parameters one has to select t
12. s LowerRight Corne GSD eastward and southward with regard to the UL location When consistent values of UL and LR are set VTTileGrabber displays on the virtual globe a layer showing the selected bounding box An other convenient way to set the UL and LR locations is provided using a cross layer displayed in the virtual globe This cross is displayed exactly at the centre of the image area and user shall pan the image to make it slip under the cross When the desired location is achieved user shall press the Catch UL or Catch LR buttons Bayan EJ vTTileGrabber File Options Help Settings longitude latitude UpperLeft Corner 1 626658 dd 43 579435 dd LowerRight Corner 1 334246 dd 43 417522 dd GSD 10 m Oi Bayonnes This document discloses subject matter in which VisioTerra has proprietary rights Recipient of this document shall not duplicate use or disclose in whole or in part information disclosed here on except for or on behalf of VisioTerra to fulfil the purpose for which the document was delivered to him 3 2 3 3 3 4 3 5 reference VT P053 SUM 002 E Tile Grabber issue 1 revision 0 date 05 11 2008 page 70f9 Visio Terra User s Manual Setting the Ground sampling distance GSD The spatial resolution of the output image may be set entering a value in the GSD text field Thi
13. s resolution is a Strictly positive decimal value given in meters in the range 0 10000 10 m Note that for a given bounding box UL LR the value of the GSD directly impacts on the size of the output image on the number of tiles required to its capture and therefore the time of the execution Setting the output format The format of the output file may be chosen selecting GeoTlFF the appropriate item in the Output format Combo Output projection gt box The available formats are Output file 626659_43 579435_10 0m Browse GeoTIFF in which particular tags of the version 1 revision 1 1 determines the coordinate reference system projection ellipsoid datum and other geodesic features TIFF version 6 producing an uncompressed image accompanied by the tfw that gives the pixel width horizontal spatial resolution the pixel height and the coordinates easting and northing of the upper left corner Note that this tfw file does not provide the projection PPM giving the RGB binary values without any geodetic information Setting the output projection The coordinate reference system CRS sometimes outputproction UTM Automatic called projection of the output image may be chosen Output file Graie selecting the appropriate item in the Output intormations utm Automatic projection Combo box The available CRS are r hue PO53_TOTAL_TILE_GR Browse L Geograp
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