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: Thursday Aug 15 15:27:16 2024 in commit: a0e37beaf0ce8a4cc6ec615b6d3d40e39f9d725f
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GRASS Development Team,
GRASS GIS 8.4.1dev Reference Manual