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) $

       Main index | Vector index | Topics index | Keywords index | Full index

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

GRASS 7.0.3                                                                                     v.import(1grass)