NAME

       v.neighbors  - Neighborhood analysis tool for vector point maps.
       Makes  each cell value a function of the attribute values assigned to the vector points or
       centroids around it, and stores new cell values in an output raster map.

KEYWORDS

       vector, algebra, statistics, raster, aggregation

SYNOPSIS

       v.neighbors
       v.neighbors --help
       v.neighbors   input=name     [layer=string]     output=name    method=string    size=float
       [--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 vector map
           Or data source for direct OGR access

       layer=string
           Layer number or name (’-1’ for all layers)
           A  single  vector  map  can  be  connected  to  multiple  database tables. This number
           determines which table to use. When used with direct OGR  access  this  is  the  layer
           name.
           Default: -1

       output=name [required]
           Name for output raster map

       method=string [required]
           Neighborhood operation
           Options: count
           Default: count

       size=float [required]
           Neighborhood diameter in map units

DESCRIPTION

       Makes  each cell value a function of the attribute values assigned to the vector points or
       centroids around it, and stores new cell values in an output raster map layer.

EXAMPLE

       Count the number of schools for a given grid (North Carolina sample dataset):
       g.region vector=schools_wake res=100 -p -a
       v.neighbors input=schools_wake output=schools_wake_3000m method=count size=3000
       d.mon wx0
       d.rast schools_wake_3000m
       d.vect schools_wake
       The result gives for each grid cell the number of points (here: schools) not farther  than
       1500 meter away (half of the given size value) from the respective cell center.

SEE ALSO

        r.neighbors

AUTHOR

       Radim Blazek

       Last changed: $Date: 2014-12-19 22:17:36 +0100 (Fri, 19 Dec 2014) $

SOURCE CODE

       Available at: v.neighbors source code (history)

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       © 2003-2018 GRASS Development Team, GRASS GIS 7.4.0 Reference Manual