table of contents
v.in.pdal(1grass) | GRASS GIS User's Manual | v.in.pdal(1grass) |
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 [-wocrjkhm] 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]
[max_ground_window_size=float]
[ground_slope=float] [max_ground_distance=float]
[initial_ground_distance=float]
[ground_cell_size=float] [--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 cordinate 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 - -j
-
Classify and extract ground points
This assignes class 2 to the groud points - -k
-
Classify ground points - -h
-
Compute height for points as a difference from ground
This requires points to have class 2 - -m
-
Use approximate algorithm in ground filter - --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 - max_ground_window_size=float
-
Maximum window size for ground filter
Default: 33 - ground_slope=float
-
Slope for ground filter
Default: 1.0 - max_ground_distance=float
-
Maximum distance for ground filter
Default: 2.5 - initial_ground_distance=float
-
Initial distance for ground filter
Default: 0.15 - ground_cell_size=float
-
Initial distance for ground filter
Default: 1
DESCRIPTION¶
v.in.pdal supports the following PDAL filters:
- groud detection with Point Cloud Library (PCL) Progressive Morphological Filter (Zhang 2003) (filters.ground)
- filters.height (requires PCL)
- 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
SEE ALSO¶
r.in.lidar, r3.in.lidar, g.region, v.vect.stats v.in.ogr,
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]
- Zhang, Keqi, et al. A progressive morphological filter for removing nonground measurements from airborne LIDAR data. Geoscience and Remote Sensing, IEEE Transactions on 41.4 (2003): 872-882.
AUTHOR¶
Vaclav Petras, NCSU GeoForAll Lab
SOURCE CODE¶
Available at: v.in.pdal source code (history)
Accessed: unknown
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© 2003-2022 GRASS Development Team, GRASS GIS 7.8.7RC1 Reference Manual
GRASS 7.8.7RC1 |