NAME

       v.import   -  Imports vector data into a GRASS vector map using OGR library and reprojects
       on the fly.

KEYWORDS

       vector, import, projection

SYNOPSIS

       v.import
       v.import --help
       v.import [-fl] input=name  [layer=string[,string,...]]    [output=name]    [extent=string]
       [encoding=string]    [snap=float]   [epsg=integer]   [datum_trans=integer]   [--overwrite]
       [--help]  [--verbose]  [--quiet]  [--ui]

   Flags:
       -f
           List supported OGR formats and exit

       -l
           List available OGR layers in data source and exit

       --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 OGR datasource to be imported

       layer=string[,string,...]
           OGR layer name. If not given, all available layers are imported

       output=name
           Name for output vector map (default: input)

       extent=string
           Output vector map extent
           Options: input, region
           Default: input
           input: extent of input map
           region: extent of current region

       encoding=string
           Encoding value for attribute data

       snap=float
           Snapping threshold for boundaries (map units)
           ’-1’ for no snap
           Default: 1e-13

       epsg=integer
           EPSG projection code
           Options: 1-1000000

       datum_trans=integer
           Index number of datum transform parameters
           -1 to list available datum transform parameters
           Options: -1-100

DESCRIPTION

       v.import imports selected layers from a OGR vector datasource into  the  current  location
       and  mapset. If the projection of the input does not match the projection of the location,
       the input is reprojected into the current location. If the projection of  the  input  does
       match the projection of the location, the input is imported directly with v.in.ogr.

NOTES

   Topology cleaning
       When  importing  polygons, non-topological polygons are converted to topological areas. By
       default, a very small snapping threshold is applied (1e-13 map units) to avoid topological
       errors  caused  by numerical inaccuracy of the input data format. If the original polygons
       contain errors (unexpected overlapping areas or small gaps between polygons),  the  import
       might need to be repeated using a larger snap value.

EXAMPLE

       # import SHAPE file at full extent and reproject to current location projection
       v.import input=research_area.shp output=research_area extent=input

SEE ALSO

        v.in.ogr, v.proj

AUTHORS

       Markus Metz
       Improvements: Martin Landa, Anna Petrasova

       Last changed: $Date: 2015-01-20 20:52:27 +0100 (Tue, 20 Jan 2015) $

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       © 2003-2016 GRASS Development Team, GRASS GIS 7.0.3 Reference Manual