GRASS GIS manual: v.in.gns

Note: This document is for an older version of GRASS GIS that is outdated. You should upgrade, and read the current manual page.

NAME

v.in.gns - Imports US-NGA GEOnet Names Server (GNS) country files into a GRASS vector points map.

KEYWORDS

vector, import, gazetteer

SYNOPSIS

v.in.gns
v.in.gns help
v.in.gns file=string [vect=string] [--overwrite] [--verbose] [--quiet]

Flags:

--overwrite: Allow output files to overwrite existing files
--verbose: Verbose module output
--quiet: Quiet module output

Parameters:

file=string: Uncompressed GNS file from NGA (with .txt extension)
vect=string: Name for output vector map

DESCRIPTION

v.in.gns imports US-NGA GEOnet Names Server (GNS) country files (Gazetteer data) into a GRASS vector points map. The country files can be downloaded from the NGA GNS Web Server (see below). The script generates a vector point map. Only original files can be processed (unzip compressed file first). These GNS files are encoded in UTF-8 which is maintained in the GRASS database.

NOTES

The current DB connection is used to write the database table.

Generally, column names longer that 10 characters are shortened to 10 characters to meet the DBF column name restrictions. If this is a problem consider choosing another database driver with db.connect.

To filter outliers (points outside of a country), the v.select module can be used to perform point-in-polygon tests. v.select saves only the GNS points falling into a country polygon into the new points map.

REFERENCES

GEOnet Names Server files for countries and territories
Column names explanations

AUTHOR

Markus Neteler, MPBA Group, ITC-irst, Trento, Italy

Last changed: $Date: 2011-11-08 02:23:26 -0800 (Tue, 08 Nov 2011) $

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