NAME

v.in.pdal - Converts LAS LiDAR point clouds to a GRASS vector map with PDAL.

KEYWORDS

vector, import, LIDAR

SYNOPSIS

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 projects’s coordinate system if needed
Reprojects input dataset to the coordinate system of the GRASS project (by default only datasets with the matching coordinate system can be imported
-o: Override projection check (use current project’s CRS)
Assume that the dataset has the same coordinate reference system as the current project
-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=name [required]: LAS input file
LiDAR input files in LAS format (*.las or *.laz)
output=name [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 current project’s coordinate reference system 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)

Latest change: Tuesday Dec 17 20:17:20 2024 in commit: d962e90c026708a4815ea2b9f46c0e84c17de22d