v.in.pdal.1grass - Man Page

Converts LAS LiDAR point clouds to a GRASS vector map with PDAL.

v.in.pdal v.in.pdal --help v.in.pdal [-wocr] input=name output=name [id_layer=string] [return_layer=string] [class_layer=string] [rgb_layer=string] [spatial=xmin,ymin,xmax,ymax] [zrange=min,max] [return_filter=string] [class_filter=integer[,integer,...]] [input_srs=string] [--overwrite] [--help] [--verbose] [--quiet] [--ui]

Flags

-w: Reproject to location’s coordinate system if needed
Reprojects input dataset to the coordinate system of the GRASS location (by default only datasets with the matching coordinate system can be imported
-o: Override projection check (use current location’s projection)
Assume that the dataset has same projection as the current location
-c: Do not automatically add unique ID as category to each point
Create only requested layers and categories
-r: Limit import to the current region
--overwrite: Allow output files to overwrite existing files
--help: Print usage summary
--verbose: Verbose module output
--quiet: Quiet module output
--ui: Force launching GUI dialog

Parameters

input=nameÂ [required]: LAS input file
LiDAR input files in LAS format (*.las or *.laz)
output=nameÂ [required]: Name for output vector map
id_layer=string: Layer number to store generated point ID as category
Set to 1 by default, use -c to not store it
return_layer=string: Layer number to store return information as category
Leave empty to not store it
class_layer=string: Layer number to store class number as category
Leave empty to not store it
rgb_layer=string: Layer number where RBG colors are stored as category
Leave empty to not store it
spatial=xmin,ymin,xmax,ymax: Import subregion only
Format: xmin,ymin,xmax,ymax - usually W,S,E,N
zrange=min,max: Filter range for z data (min,max)
return_filter=string: Only import points of selected return type
If not specified, all points are imported
Options: first, last, mid
class_filter=integer[,integer,...]: Only import points of selected class(es)
Input is comma separated integers. If not specified, all points are imported.
input_srs=string: Input dataset projection (WKT or EPSG, e.g. EPSG:4326)
Override input dataset coordinate system using EPSG code or WKT definition

Description

Imports a point cloud (e.g. from a LAS file) as vector points with the PDAL library. v.in.pdal supports the following filters:

2D region filter
Z coordinates filter
return filter
class filter

Examples

Import only XYZ coordinates of points, limit the import to the current computational region and reproject to the Location projection during the import:

v.in.pdal input=points.las output=points -c -r -w

References

V. Petras, A. Petrasova, J. Jeziorska, H. Mitasova (2016): Processing UAV and lidar point clouds in GRASS GIS. XXIII ISPRS Congress 2016 [ISPRS Archives, ResearchGate]

Author

Vaclav Petras, NCSU GeoForAll Lab

Source Code

Available at: v.in.pdal source code (history)

Accessed: Tuesday Mar 19 11:02:25 2024

Info

GRASS 8.3.2 GRASS GIS User's Manual