Scarc 2013 li_dar_arc10-1

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Scarc 2013 li_dar_arc10-1

  1. 1. ArcGIS 10.1 LiDARAlan RickenbakerLexington County, SCGeoff SchwitzgebelSC Dept. of Natural ResourcesHolly GillamSC Dept. of Natural Resources
  2. 2.  Remote Sensing Technology Elevation Laser Returns multiple pulsesLiDAR – Light Detection and Ranginghttp://www.asu.edu/courses/art345/pike_b/terrainmapping/lidar.htm
  3. 3. Lexington County LiDARPartnership with SC LiDAR ConsortiumDNR, FEMA, USGS, etc.January 2010
  4. 4. Intensity Images
  5. 5. LAS Dataset References LAS files Surface Constraints View data for individual points Can be added to a Mosaic Dataset Interactive editing and classification
  6. 6. Steve Snow - LiDAR workshopEsri Industry Specialist
  7. 7. LAS Point Classes by Project YearASPRS LAS formatClassificationClass2007 2008 2009 2010 2011 2012Unclassified 1 X X X X X XGround (bare-earth) 2 X X X X X XLow Vegetation 3 ---- ---- ---- ---- ---- ----Medium Vegetation 4 ---- ---- ---- ---- ---- ----High Vegetation 5 ---- ---- ---- ---- ---- ----Building 6 ---- ---- ---- ---- ---- ----Noise 7 ---- ---- ---- ---- ---- ----Model Key-point(Thinned bare-earth) 8---- X X X X XWater 9 ---- X X X X XReserved 10---- ----Bridges and boxculverts---- ----Reserved 11 ---- ---- ---- ---- ---- ----Overlap Points 12 ---- ---- ---- ---- ---- ----Reserved 13---- ---- ---- ---- ----Bridges and boxculvertsReserved 14-31 ---- ---- ---- ---- ---- ----ASPRS class used for LAS point cloud dataPoint data for this class put into Class 1, unclassifiedOptional use by vendor following ASPRS standard---
  8. 8. Not sure if you can use an LAS Dataset?
  9. 9. LAS Dataset ArcGIS Licensing MatrixRequirementsFrom ESRI Desktop 10.1 Help
  10. 10. If you intend on modifying an LAS Dataset:•Create a backup of your LiDAR data•If you do not have the storage, make the directory read-only•Tools in both ESRI and other 3rd party software will editthe original data directly•Use subsets of the data where possibleGetting Started
  11. 11. 3D Analyst RequiredArcMap Toolbar : LAS DatasetTable of Contents: Properties for LAS DatasetNot in toolbar (manage in ArcToolbox)Does not require3D AnalystUsing an Existing LAS Dataset in ArcGIS
  12. 12. ABCDEFGHIALAS Dataset Symbology in ArcGISTable of Contents: Properties for LAS Data set
  13. 13. LAS Datasets – On The Fly DataElevation - TerrainLAS Dataset Properties
  14. 14. LAS Datasets – On The Fly DataElevation - SurfaceLAS Dataset Properties
  15. 15. LAS Datasets – On The Fly DataSlopeLAS Dataset Properties
  16. 16. LAS Datasets – On The Fly DataAspectLAS Dataset Properties
  17. 17. LAS Datasets – On The Fly DataContours and ElevationLAS Dataset Properties
  18. 18. Tile: 4124-04.lasBare-earth (Class 2, 8), and Water (class 9)Unclassified (Class 1), Bare-earth (Class 2, 8), and Water (class 9)Other LAS Software Options
  19. 19. Applying Imagery Colors to LAS Files
  20. 20. Terrain Color From Imagery
  21. 21. LAS Point Color From ImagerySoftware: Mars 7 by MERRICKData Required:• LAS tile: 976502.las• County Imagery: 976502.jp2Display Option: Color by Imagery (Fusion)
  22. 22. Building Reclassification
  23. 23. LAS Dataset Surface Constraints• Can be added or removed through ArcToolbox• Turn on/off in the LAS data set properties in ArcMap• Cannot be managed in ArcMap toolbar – LAS Data SetArcMap ToolbarArcMap LAS Data Set PropertiesArcToolbox LAS Data ToolsYESYESNO
  24. 24. Bare-earth Terrain SurfaceGround only Hydro Enforced Hydro FlattenedFeature Classes in Terrain Surface:• Masspoints• Project BoundaryFeature Classes in Terrain Surface:• Masspoints• Hydrofeature• Islands• LiDAR Extent• WaterbodyFeature Classes in Terrain Surface:• Masspoints• Hydrofeature Banklines• Islands• LiDAR Extent• Waterbody
  25. 25. LAS Datasets – On The Fly DataSurface Constraints• Hydro Flattened SurfaceWaterbody, Island, Banklines (subset ofHYDROFEATURE) from LiDAR basedhydrobreaklines.
  26. 26. LAS Datasets – On The Fly DataSurface Constraints• Hydro Enforced SurfaceWaterbody, Island, HYDROFEATUREfrom LiDAR based hydrobreaklines.
  27. 27. LAS Datasets – On The Fly DataSurface Constraints• Ground Only SurfaceNo Surface Constraints, ground only.
  28. 28. Lexington County LiDAR Uses Updated flood mapping Increased accuracy of elevation surfaces used withPictometry Creation of more detailed contours Creation of DEM, DSM, and Hillshade Impervious surface determination Building footprints Land use mapping Future development projects Archaeological and historical studies (i.e. 12,000-year park) Slope modeling Ditches Line of sight studies
  29. 29. Digital Surface Model (DSM)Digital Terrain Model (DTM)
  30. 30. Hillshade Basemap
  31. 31. Live Demo
  32. 32. ArcGIS 10.1 HelpSteve Snow – Esri Industry SpecialistLiDAR Workshop PresentationsKevin Armstrong | Solutions EngineerEsri-Charlotte | 3325 Springbank Ln | Charlotte, NC 28226T 704 541-9810 x8635Cody Benkleman and Vinay Viswambharan Live Training Seminar aboutWorking with Imagery at ArcGIS 10.1.http://blogs.esri.com/esri/arcgis/2012/11/07/free-lts-recording-working-with-imagery-at-arcgis-10-1/Raw LAS File DownloadUSGS CLICK http://lidar.cr.usgs.gov/NOAA Digital Coasthttp://www.csc.noaa.gov/digitalcoast/data/coastallidar/index.htmlOther Resources
  33. 33. Alan Rickenbaker , GIS MappingLexington CountyPhone:(803) 785-1454arickenbaker@lex-co.comQuestions ?Holly Gillam , Spatial Data ManagerSouth Carolina Department of Natural Resourcesgillamh@dnr.sc.govGeoff Schwitzgebel, GIS Applications ManagerSouth Carolina Department of Natural Resourcesschwitzgebelg@dnr.sc.gov

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