• Antelope Release 5.5 Mac OS X 10.8.5 2015-04-21

 

NAME

polygon2xy - export polygon data for usage with GMT.

SYNOPSIS

polygon2xy [-subset expr] db

SUPPORT


Contributed code: NO BRTT support.
THIS PIECE OF SOFTWARE WAS CONTRIBUTED BY THE ANTELOPE USER COMMUNITY. BRTT DISCLAIMS ALL OWNERSHIP, LIABILITY, AND SUPPORT FOR THIS PIECE OF SOFTWARE.

FOR HELP WITH THIS PIECE OF SOFTWARE, PLEASE CONTACT THE CONTRIBUTING AUTHOR.

DESCRIPTION

polygon2xy writes the vertices of polygons stored in a database to standard out. Polygons are closed by appending the 1st vertex if not already closed.

OPTIONS

EXAMPLE



Export the border of Austria:

polygon2xy -subset "pname=~/Austria/" mydb > Austria.xy

dbsubset mydb.polygon "pname=~/Austria/"|\
        polygon2xy - > Austria.xy

BUGS AND CAVEATS

The output is in the form of a multiple segment file, i.e the individual polygons are preceeded by a > and the -M flag must be specified when running psxy with the output. If the selected records are closed (if closed is set to "y" in the database), the output is a closed polygon, i.e there is no need to specify the -L flag to psxy. This allows to plot both polygons, lines and points from the same file.

SEE ALSO

dbsubset(1), dbexpressions(5),
polygon1.2(5), psxy(1), xy2polygon(1).

AUTHOR

Nikolaus Horn
ZAMG / Vienna, nikolaus.horn@zamg.ac.at
Antelope User Group Contributed Software
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