r.resamp.stats - Resamples raster map layers to a coarser grid using aggregation.

       Glynn Clements

r.resamp.stats fills a grid cell (raster) matrix with aggregated values generated from  a  set  of  input
       layer data points.

       Without the -w switch, the aggregate is computed over all of the input cells whose centers lie within the
       output cell.

       With  the  -w switch, the aggregate uses the values from all input cells which intersect the output cell,
       weighted according to the proportion of the source cell which  lies  inside  the  output  cell.  This  is
       slower, but produces a more accurate result.

       Resample elevation raster map to a lower resolution (from 6m to 20m; North Carolina sample dataset):
       g.region raster=el_D782_6m -p
       g.region res=20 -ap
       # from 6m to 20m: weighted resampling -w
       r.resamp.stats -w input=el_D782_6m output=el_D782_20m
       Resamplingof6mDEM(left)to20mDEM(right)withweightedresampling(subset)

       raster, resample, univariate statistics, aggregation

r.resamp.stats  - Resamples raster map layers to a coarser grid using aggregation.

       Resampling  modules (r.resample,r.resamp.stats,r.resamp.interp,r.resamp.rst) resample the map to match
       the current region settings.

       The notion of weighting doesn’t make any sense for the min and max aggregates. However, the -w flag still
       has significance in that, when multiple destination cells overlap a  source  cell,  the  source  cell  is
       included in the calculation of all of the destination cells.

g.region,r.resample,r.resamp.rst,r.resamp.filter,r.resamp.interp,r.neighbors

       Overview: Interpolation and Resampling in GRASS GIS

       Examples how statistical functions are applied can be found in the r.neighbors module documentation.

       Available at: r.resamp.stats source code (history)

       Accessed: Friday Apr 04 01:19:30 2025

       Main index | Raster index | Topics index | Keywords index | Graphical index | Full index

       © 2003-2025 GRASS Development Team, GRASS GIS 8.4.1 Reference Manual

GRASS 8.4.1                                                                               r.resamp.stats(1grass)

r.resamp.statsr.resamp.stats--helpr.resamp.stats [-nw] input=nameoutput=name  [method=string]   [quantile=float]   [--overwrite]  [--help]
       [--verbose]  [--quiet]  [--ui]

   Flags:-n
           Propagate NULLs

       -w
           Weight according to area (slower)

       --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 raster map

       output=name[required]
           Name for output raster map

       method=string
           Aggregation method
           Options:  average,median,mode,minimum,maximum,range,quart1,quart3,perc90,sum,variance,stddev,quantile,count,diversity
           Default: averagequantile=float
           Quantile to calculate for method=quantile
           Options: 0.0-1.0
           Default: 0.5