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r.resamp.interp
Langue: en
Version: 371101 (fedora - 01/12/10)
Section: 1 (Commandes utilisateur)
NAME
r.resamp.interp - Resamples raster map layers using interpolation.KEYWORDS
raster, resampleSYNOPSIS
r.resamp.interpr.resamp.interp help
r.resamp.interp input=name output=name [method=string] [--overwrite] [--verbose] [--quiet]
Flags:
- --overwrite
Allow output files to overwrite existing files- --verbose
Verbose module output- --quiet
Quiet module output
Parameters:
- input=name
Name of input raster map- output=name
Name for output raster map- method=string
Interpolation method
Options: nearest,bilinear,bicubic
Default: bilinear
DESCRIPTION
r.resamp.interp resamples an input raster map by interpolating between the neighboring cells via a selectable resampling algorithm. All cells present in the neighborhood of the input raster cell must be non-null to generate a non-null cell in the output raster map. A choice of three interpolation methods is available; each uses the weighted values of a different number of adjacent cells in the input map to determine the value of each cell in the output map as follows:-
- nearest neighbour (1 cell)
- bilinear (4 cells)
- bicubic (16 cells)
Note that for bilinear and bicubic interpolation, cells of the output raster that cannot be bounded by the appropriate number of input cell centers are set to NULL (NULL propagation). This could occur due to the input cells being outside the current region, being NULL or MASKed.
NOTES
For longitude-latitude databases, the interpolation algorithm is based on degree fractions, not on the absolute distances between cell centers. Any attempt to implement the latter would violate the integrity of the interpolation method.
SEE ALSO
g.region, r.resample, r.resamp.rst r.resamp.statsAUTHOR
Glynn ClementsLast changed: $Date: 2008-03-26 14:52:37 +0100 (Wed, 26 Mar 2008) $
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