Geoscience Reference
In-Depth Information
-i st-helens.las
Name of the input point cloud in compressed format (libLAS library must be
compiled with LAZ support).
-dx 10 -dy 10
Output grid cell size is 10 by 10 meter.
-a_srs epsg:26910
Assign this coordinate reference system to the output raster dataset (can be
obtained from las file with lasinfo).
-ot Float32
We set the data type to floating point.
-o st-helens_dsm_10.tif
Name of the output raster dataset.
In the next example, we create the digital surface model in Fig.
15.3
a, using the
maximum return for all overlapping pulse returns.
pklas2img -i forest_31370.laz -comp max -fir all -n z -dx 1 -dy
→
1-ulx 56256 -uly 196912 -lrx 57229 -lry 195293 -a_srs
→
epsg:31370 -ot Float32 -o forest_dsm.tif
-i forest_31370.laz
Name of the input point cloud in compressed format (libLAS library must be
compiled with LAZ support).
-comp max
Composite rule: retain the maximum value in case points overlap in grid cell.
-fir all
Select all returns.
-n z
Select the height attribute for each point (this is the default).
-dx 1 -dy 1
Output grid cell size is 1 by 1 meter.
-ulx 56256 -uly 196912 -lrx 57229 -lry 195293
Create output raster dataset for this bounding box.
-a_srs epsg:31370
Assign this (Belgian) coordinate reference system to the output raster dataset.
-ot Float32
Set the data type to floating point.
-o forest_dsm.tif
Name of the output raster dataset.
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