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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.
SEE ALSO
db.connect,
v.select
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 01:42:51 -0800 (Tue, 08 Nov 2011) $
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