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 [-flo] 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
- -o
- Override projection check (use current location's projection)
- Assume that the dataset has same projection as the current location
- --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
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.
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.
# import SHAPE file at full extent and reproject to current location projection
v.import input=research_area.shp output=research_area extent=input
v.in.ogr,
v.proj
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 7.0.4 Reference Manual