Note: This addon document is for an older version of GRASS GIS that will be discontinued soon. You should upgrade your GRASS GIS installation, and read the current addon manual page.
NAME
v.vol.idw - Interpolates point data to a 3D raster map using Inverse Distance Weighting (IDW) algorithm.
KEYWORDS
vector,
Volume,
voxel,
interpolation,
IDW
SYNOPSIS
v.vol.idw
v.vol.idw --help
v.vol.idw input=name [layer=string] output=name column=name npoints=count [--overwrite] [--help] [--verbose] [--quiet] [--ui]
Flags:
- --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]
- Name of input 3D vector points map
- layer=string
- Number of vector layer field attribute to use for calculation
- Default: 1
- output=name [required]
- Name for output 3D raster map
- column=name [required]
- Name of attribute column (data type must be numeric)
- npoints=count [required]
- Number of interpolation points
- Default: 12
v.vol.idw fills a RASTER3D raster volume matrix with
interpolated values generated from a set of irregularly spaced data
points using numerical approximation (weighted averaging)
techniques. The interpolated value of a tile is determined
by values of nearby data points and the distance of the
cell from those input points. In comparison with other
methods, numerical approximation allows representation of
more complex volumes (particularly those with anomalous
features), restricts the spatial influence of any errors,
and generates the interpolated volume from the data
points.
v.vol.idw input=map output=rastermap3d column=col_name npoints=36
g.region,
v.in.ascii,
v.in.db,
v.surf.idw,
v.vol.rst,
v.to.rast3
Jaro Hofierka, Department of Geography and Regional Development,
University of Presov, Presov, Slovakia,
hofierka@geomodel.sk
Modifications for raster3d library and vector format:
Noortheen Raja J, Institute of Remote Sensing,College of Engineering, Guindy,
Anna University, India.
jnoortheen@gmail.com
SOURCE CODE
Available at:
v.vol.idw source code
(history)
Latest change: Mon Jun 28 07:54:09 2021 in commit: 1cfc0af029a35a5d6c7dae5ca7204d0eb85dbc55
Note: This addon document is for an older version of GRASS GIS that will be discontinued soon. You should upgrade your GRASS GIS installation, and read the current addon manual page.
Main index |
Vector index |
Topics index |
Keywords index |
Graphical index |
Full index
© 2003-2023
GRASS Development Team,
GRASS GIS 7.8.8dev Reference Manual