v.in.pdal(1grass)

1v.in.pdal(1)                GRASS GIS User's Manual               v.in.pdal(1)
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NAME

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

10       vector, import, LIDAR
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SYNOPSIS

13       v.in.pdal
14       v.in.pdal --help
15       v.in.pdal   [-wocrjkhm]   input=name   output=name    [id_layer=string]
16       [return_layer=string]      [class_layer=string]      [rgb_layer=string]
17       [spatial=xmin,ymin,xmax,ymax]       [zrange=min,max]       [return_fil‐
18       ter=string]   [class_filter=integer[,integer,...]]   [input_srs=string]
19       [max_ground_window_size=float]                     [ground_slope=float]
20       [max_ground_distance=float]             [initial_ground_distance=float]
21       [ground_cell_size=float]     [--overwrite]     [--help]     [--verbose]
22       [--quiet]  [--ui]
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24   Flags:
25       -w
26           Reproject to location’s coordinate system if needed
27           Reprojects  input  dataset  to  the  coordinate system of the GRASS
28           location (by default only datasets with the matching cordinate sys‐
29           tem can be imported
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31       -o
32           Override projection check (use current location’s projection)
33           Assume that the dataset has same projection as the current location
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35       -c
36           Do not automatically add unique ID as category to each point
37           Create only requested layers and categories
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39       -r
40           Limit import to the current region
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42       -j
43           Classify and extract ground points
44           This assignes class 2 to the groud points
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46       -k
47           Classify ground points
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49       -h
50           Compute height for points as a difference from ground
51           This requires points to have class 2
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53       -m
54           Use approximate algorithm in ground filter
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56       --overwrite
57           Allow output files to overwrite existing files
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59       --help
60           Print usage summary
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62       --verbose
63           Verbose module output
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65       --quiet
66           Quiet module output
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68       --ui
69           Force launching GUI dialog
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71   Parameters:
72       input=nameÂ [required]
73           LAS input file
74           LiDAR input files in LAS format (*.las or *.laz)
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76       output=nameÂ [required]
77           Name for output vector map
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79       id_layer=string
80           Layer number to store generated point ID as category
81           Set to 1 by default, use -c to not store it
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83       return_layer=string
84           Layer number to store return information as category
85           Leave empty to not store it
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87       class_layer=string
88           Layer number to store class number as category
89           Leave empty to not store it
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91       rgb_layer=string
92           Layer number where RBG colors are stored as category
93           Leave empty to not store it
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95       spatial=xmin,ymin,xmax,ymax
96           Import subregion only
97           Format: xmin,ymin,xmax,ymax - usually W,S,E,N
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99       zrange=min,max
100           Filter range for z data (min,max)
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102       return_filter=string
103           Only import points of selected return type
104           If not specified, all points are imported
105           Options: first, last, mid
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107       class_filter=integer[,integer,...]
108           Only import points of selected class(es)
109           Input is comma separated integers. If not specified, all points are
110           imported.
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112       input_srs=string
113           Input dataset projection (WKT or EPSG, e.g. EPSG:4326)
114           Override input dataset coordinate system using  EPSG  code  or  WKT
115           definition
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117       max_ground_window_size=float
118           Maximum window size for ground filter
119           Default: 33
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121       ground_slope=float
122           Slope for ground filter
123           Default: 1.0
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125       max_ground_distance=float
126           Maximum distance for ground filter
127           Default: 2.5
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129       initial_ground_distance=float
130           Initial distance for ground filter
131           Default: 0.15
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133       ground_cell_size=float
134           Initial distance for ground filter
135           Default: 1
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DESCRIPTION

138       v.in.pdal supports the following PDAL filters:
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140           ·   groud detection with Point Cloud Library (PCL) Progressive Mor‐
141               phological Filter (Zhang 2003) (filters.ground)
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143           ·   filters.height (requires PCL)
144       v.in.pdal supports the following filters natively:
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146           ·   2D region filter
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148           ·   Z coordinates filter
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150           ·   return filter
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152           ·   class filter
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EXAMPLES

155       Import only XYZ coordinates of points, limit the import to the  current
156       computational  region  and  reproject to the Location projection during
157       the import:
158       v.in.pdal input=points.las output=points -c -r -w
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REFERENCES

164           ·   V. Petras, A. Petrasova, J. Jeziorska, H. Mitasova (2016): Pro‐
165               cessing  UAV  and lidar point clouds in GRASS GIS.  XXIII ISPRS
166               Congress 2016 [ISPRS Archives, ResearchGate]
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168           ·   Zhang, Keqi, et al.  A  progressive  morphological  filter  for
169               removing nonground measurements from airborne LIDAR data.  Geo‐
170               science and Remote Sensing, IEEE Transactions on  41.4  (2003):
171               872-882.
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AUTHOR

174       Vaclav Petras, NCSU GeoForAll Lab
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SOURCE CODE

177       Available at: v.in.pdal source code (history)
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179       Main  index  | Vector index | Topics index | Keywords index | Graphical
180       index | Full index
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182       Â© 2003-2020 GRASS Development Team, GRASS GIS 7.8.5 Reference Manual
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186GRASS 7.8.5                                                       v.in.pdal(1)