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Digital Aerial SketchMapping (DASM) Software Primer – GeoLink v6.4 Denver, CO – April 2012

Digital Aerial SketchMapping (DASM) Software Primer – GeoLink v6.4 Denver, CO – April 2012. USFS Forest Health Technology Enterprise Team USFS Remote Sensing Applications Center. Charlie Schrader USFS Remote Sensing Applications Center (RSAC) Salt Lake City JD Mullen

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Digital Aerial SketchMapping (DASM) Software Primer – GeoLink v6.4 Denver, CO – April 2012

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  1. Digital Aerial SketchMapping (DASM)Software Primer – GeoLink v6.4Denver, CO – April 2012 USFS Forest Health Technology Enterprise Team USFS Remote Sensing Applications Center Charlie Schrader USFS Remote Sensing Applications Center (RSAC) Salt Lake City JD Mullen USFS Forest Health Tech. Enterprise Team (FHTET) Ft Collins http://www.fs.fed.us/eng/rsac/ (801) 975-3750

  2. The Schedule… • Intro Slides • Architecture of GeoLink • Build a GeoLink Project – Demo • Lunch • Your turn…build a project • Background map discussion.

  3. DASM – GeoLink Project set-up… • The GeoLink v 6.4 project • Consists of of.def, .prj, .reg files, keypad files (.pad) , and • Data folders - Log and Translate folders • Replicate directory structure if copying projects to another PC • Use ‘Template_Project’ and ‘Save As’ to create projects…

  4. GeoLink project files.. GPS C:\SketchMap\Background_Maps\*.gor C:\SketchMap\Background_Maps\*.shp C:\SketchMap\<project>\<project>.prj C:\SketchMap\<project>\<project>.def C:\SketchMap\<project>\<project>.reg Background Maps Project contains: Feature definitions (points, polys) Table definition for the features, virtual keypads Display settings for background maps (Projection, attribute display, theme colors, etc) GPS info (COM port, type of receiver, baud rate, etc Translation settings (Coordinate system output)

  5. How GeoLink works….logging GPS Data LOG Folder* Shapes (Points, Lines, Polys) Microsoft Access file (*.mdb) Attribute information GPS data (*.dat) ‘Enter’ Key C:\SketchMap\Log\<date>\<time>.mdb C:\SketchMap\Log\<date>\<time>.dat C:\SketchMap\Log\<date>\<time>\ <feature>.shp, .shx, slx * These files are referred to as proto-shapefiles. GeoLink Logging PC Hard drive

  6. GeoLink Project set-up…cont • Multiple projects in same directory? • All write to same Log and Translate folders • …and the use the same keypad files. • User interface… • Aerial Sketchmapping Customizations turned on • Multi-Document Interface (MDI) • Active document is the one on top.. • Toolbars and Menus available based on active document • Process menu – access to documents

  7. Coordinate systems in GeoLink…. Background Maps Coordinate system of each background map Proper display of background maps… Coordinate system selected in screen settings display dialog. Screen settings dialog. Selected coordinate system units will display while logging. Data independent. Output shapefiles Coordinate system selected in translate GIS dialog. Data translated will be in the specified coordinate system and units. Translate GIS dialog

  8. How GeoLink works…translation LOG Folder Shapes (Points, Lines, Polys) Microsoft Access file (*.mdb) Attribute information GPS data (*.dat) PC Hard drive Translate files…. Translation Settings TRANSLATE Folder ESRI Shapefiles PC Hard drive View, Post-Process in GIS

  9. DASM – Mission Planning… • Digitize flightlines and/or survey area boundaries. • Organize background map data • USGS DRG, Satellite-based, OrthoPhotos, Shapefiles • Use a logical file structure, such as district/forest boundaries or USGS quad boundaries. • Develop attributing scheme

  10. C:\Sketchmap\ Level A Geographic Unit (State, Region, NF) Level A Geographic Unit (State, Region, NF) Other Projects Background Level B Geographic Unit (NF, District, Project) Level B Geographic Unit (NF, District, Project) Images Shapefiles <Project>.prj <Project>.def <Project>.reg <Padnames>.pad <Project>.prj <Project>.def <Project>.reg <Padnames>.pad Background Background DRGs *.shp *.shx *.dbf *.slf Translte PostProc (Shapefiles created during post-processing Translte PostProc *.tif *.tfw *.gor *.tif *.tfw *.gor Log Log Survey-Start and Translate-Start Date-named Folders 013001 013001 Survey-Start Time-named Files 162024.dat 162024.mdb Survey-Start and Translate-Start Time-named Folders 162959 162024 NOTES: Folders and files shown in bold font are created by the GeoLink software, whereas those in regular font are created by the user. Background folders may be placed at any appropriate geographic level, as determined by the area of coverage of the contained files. Consider placing background data in sub-folders named for the coordinate system or geographically-referenced quad names. Translate-Start Time-named GPS Files 162959.shp, 162959.shx, & 162959.dbf Area.shp, Area.shx, & Area.dbf Lines.shp, Lines.shx, & Lines.dbf Point.shp, Point.shx, & Point.dbf Translated Features Example Data Structure for GeoLink D-ASM Missions

  11. Digital Aerial SketchMapping… • Software set-up demo

  12. DASM – Raster map issues.. • Raster maps – DRGs, Image maps, DOQQs • Formats - .tiff, .sid, .jpg • Need the world file… • GeoLink Optimized Raster files (.gor) • Quick display refresh…using pyramid layers • Only viewable in GeoLink • …so you need to keep the other files around to use in ArcGIS or ArcView.

  13. DASM – Raster map issues.. • Performance considerations… • Too many background maps and system will bog down… • How much is too much? • Things that seem to help… • Fewer large map tiles instead of many smaller ones.. • “Burning” of vector data (roads, contours) into imagery • If software begins to act flaky, remove some maps from the map list…

  14. Digital Aerial SketchMapping…Post-processing • Post-Processing – What are your goals? • Produce polygons from points • Rectify polygons that overlap • Combine shapefiles from surveys • Calculate acres and TPA • Create a map of surveyed areas from flightlines • Format feature attribute tables • Output point coordinates to GPS for field checks

  15. Digital Aerial SketchMapping…Post-Processing • Translate data from GeoLink • Projection considerations • Data editing (QA/QC) • Softcopy editing using ArcView GIS • Changing feature position or boundary • Deleting erroneous features • Checking feature attributes

  16. Digital Aerial SketchMapping…SketchTools SketchTools…an ArcView 3.x GIS extension

  17. Digital Aerial SketchMapping…Post-processing ShapeTools – ArcGIS 8.x – 9.x extension Also ODF Xtools….

  18. DASM… • Resources • DASM Home Page: http://www.fs.fed.us/foresthealth/technology/dasm • DASM Bulletin Board • http://dasmforesthealth.blogspot.com/

  19. Digital Aerial SketchMapping… • Support Charlie Schrader 541.312.4291 541.419.0356 – cell cschrader@fs.fed.us JD Mullen 970.295.5852 jmullen@fs.fed.us Aaron Morris 601.497.8999 Michael Baker Jr, Inc GeoLink amorris@mbakercorp.com

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