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NAME

v.what - Queries a vector map layer at given locations.

KEYWORDS

vector, querying

SYNOPSIS

v.what
v.what help
v.what [-dag] map=name[,name,...] [east_north=east,north[,east,north,...]] [distance=float] [--verbose] [--quiet]

Flags:

-d
Print topological information (debugging)
-a
Print attribute information
-g
Print the stats in shell script style
--verbose
Verbose module output
--quiet
Quiet module output

Parameters:

map=name[,name,...]
Name of input vector map
east_north=east,north[,east,north,...]
Coordinates for query
If not given reads from standard input
distance=float
Query threshold distance
Default: 0

DESCRIPTION

v.what outputs the category number value(s) associated with user-specified location(s) in user-specified vector map layer(s). This module was derived from the d.what.vect module by removing all interactive code and modification of the output for easy parsing. Using the -g flag generates script-style output which is easily parsable.

EXAMPLE

North Carolina sample dataset example:

Query polygon at given position: 

v.what zipcodes_wake east_north=637502.25,221744.25

Find closest hospital to given position within given distance (search radius): 

v.what hospitals east_north=542690.4,204802.7 distance=2000000

SEE ALSO

d.what.vect

AUTHOR

Trevor Wiens
Edmonton, Alberta, Canada

Last changed: $Date: 2014-02-10 14:43:16 -0800 (Mon, 10 Feb 2014) $

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