fef97f6275
SHR3D is available as writers.shr3d and can be appended to any PDAL pipeline. PDAL will not be altered to infer writers.shr3d (many writers could write a TIF), so users will have to specify writers.shr3d explicitly. ALIGN3D is available as filters.align3d and can be inserted into any PDAL pipeline. ALIGN3D will take the first incoming PointView as the fixed or reference PointView, and will register all subsequent PointViews to this reference view. Minor changes: Ignore build directory for in-source builds. Add clang-format config file (the plugin code adheres to this). PubGeo common code updated to read directly from PDAL PointViews. Common code also updated to silence a bunch of warnings.
JHU/APL pubgeo
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SHR3D
Shareable High Resolution 3D Point Cloud Classification
SHR3D classifies a 3D point cloud to generate simple raster products, including a Digital Surface Model (DSM), Digital Terrain Model (DTM), and a classification image labeling ground, buildings, and trees.
SHR3D Usage
./shr3d <Input File(LAS|TIF)> DH=<Horizontal uncertainty(m)> DZ=<Vertical uncertainty(m)> AGL=<Min building height(m)> AREA=<Min building area(m^2)>
Example:
./shr3d shr3dMe.las DH=0.5 DZ=0.5 AGL=2 AREA=50
This will produce a multiple tif files as a result:
- Classification image- 'Colored' by classification for each pixel: buildings, ground, and trees
- Building image- Binary mask of all detected buildings
- DSM- Digital surface model (reflective surface)
- DTM- Digital terrain model (bare earth, or ground)
ALIGN3D
Align 3D Point Cloud Registration Tool
ALIGN3D estimates and applies a transform to align 3D point clouds. This algorithm was developed for use with airborne lidar, multiple view satellite imagery, and synthetic aperture radar derived point clouds.
ALIGN3D Usage
./align3d <Reference point cloud(LAS)> <Target point cloud(LAS)> maxdz=<Maximum local z difference(m)> gsd=<Ground sample distance(m)> maxt=<Maximum XY translation for search(m)>
Example:
./align-3d reference.las target.las maxt=10.0 gsd=1.0
This will produce multiple output files:
- Aligned.las- A point cloud representation of the target, aligned to the reference
- Aligned.tif- A DSM of the target, aligned to the reference
- Offsets.txt- A list of the xyz offsets to translate the target to align with the reference