2 AHN2 surface and bare earth 0.5m raster dataset Aerial Photography 0.5m Some ArcObjects code tot create text file LA...
3 0.5m bare earth raster or bare earth + objects, but no point clouds
4 Along with AHN2 you may obtain some aerial photography orjust use one of the many web services available…
5 Now use IIdentify::Identify(IPoint) or the much fasterIPixelBlock3 to loop through the pixels and build a text file wit...
6 Using LAStools it is easy to convert a text file into LAS:  txt2las -i input.txt -parse xyzRGB -skip 1 -o output.las -s...
7 Recently Martin released a Toolbox for ArcGIS:                     … and yes, it supports ArcGIS 10.1!                 ...
8 The LAS file can be imported into a LAS dataset in ArcGIS 10.1 Select your files of folder Specify the output lasd D...
9 Use the LAS Dataset toolbar to view profile and edit classes                    http://resourcesbeta.arcgis.com/en/help...
10 Use ArcScene to show the LAS data in RGB                   http://resourcesbeta.arcgis.com/en/help/main/10.1/index.htm...
http://twitter.com/#!/XanderBakker                                                     http://nl.linkedin.com/in/xanderbak...
Playing around with LiDAR, AHN2, Aerial Photography and LAStools in ArcGIS 10.1
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Playing around with LiDAR, AHN2, Aerial Photography and LAStools in ArcGIS 10.1

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Presentation on using ArcObjects and LAStools to combine AHN2 raster data and aerial photography to create a LAS dataset and visualize it in the new ArcGIS 10.1

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Transcript of "Playing around with LiDAR, AHN2, Aerial Photography and LAStools in ArcGIS 10.1"

  1. 1. 2 AHN2 surface and bare earth 0.5m raster dataset Aerial Photography 0.5m Some ArcObjects code tot create text file LAStools to convert into LAS file ArcGIS 10.1 + 3D analyst to create LAS dataset Visualization in ArcGIS 10.1
  2. 2. 3 0.5m bare earth raster or bare earth + objects, but no point clouds
  3. 3. 4 Along with AHN2 you may obtain some aerial photography orjust use one of the many web services available…
  4. 4. 5 Now use IIdentify::Identify(IPoint) or the much fasterIPixelBlock3 to loop through the pixels and build a text file withthe following format:X [TAB] Y [TAB] Z [TAB] R [TAB] G [TAB] B Use IRasterIdentifyObj::MapTip for the RGB values, note thatthe maptip gives a string with:Red = 100, Green = 150, Blue = 200 It would be nice if ArcGIS 10.1 would offer a way to create LASdata, but no worries that part is solved by…
  5. 5. 6 Using LAStools it is easy to convert a text file into LAS: txt2las -i input.txt -parse xyzRGB -skip 1 -o output.las -set_version 1.2  the input file (-i) is “input.txt"  the output file (-o) is “output.las"  the first 3 columns are parsed to xyz, columns 4th to 6th to RGB  the first line (header) is skipped using "-skip 1"  the output LAS version is set to 1.2 by "-set_version 1.2" LAStools can do a lot more! More information on LAStools: https://twitter.com/#!/LAStools http://www.cs.unc.edu/~isenburg/lastools/ http://www.linkedin.com/groups/LAStools-4408378 http://www.facebook.com/LAStools
  6. 6. 7 Recently Martin released a Toolbox for ArcGIS: … and yes, it supports ArcGIS 10.1! More information on LAStools: https://twitter.com/#!/LAStools http://www.cs.unc.edu/~isenburg/lastools/ http://www.linkedin.com/groups/LAStools-4408378 http://www.facebook.com/LAStools
  7. 7. 8 The LAS file can be imported into a LAS dataset in ArcGIS 10.1 Select your files of folder Specify the output lasd Define any surface constraints Coordinate system, etc …… and hit OK http://resourcesbeta.arcgis.com/en/help/main/10.1/index.html#/Create_LAS_Dataset/00170000016w000000/
  8. 8. 9 Use the LAS Dataset toolbar to view profile and edit classes http://resourcesbeta.arcgis.com/en/help/main/10.1/index.html#//015w00000053000000
  9. 9. 10 Use ArcScene to show the LAS data in RGB http://resourcesbeta.arcgis.com/en/help/main/10.1/index.html#/Point_display_options/015w0000005t000000/
  10. 10. http://twitter.com/#!/XanderBakker http://nl.linkedin.com/in/xanderbakker Xander Bakker Senior GIS Advisor Xander [DOT] Bakker [AT] Grontmij [DOT] NL http://software.grontmij.nlGrontmij Netherlands BV :: GIS & ICT – GIS Team :: http://www.Grontmij.com :: +31 30 220 79 11

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