[Xastir] ANNOUNCE: Maidenhead Grid overlays in SHP format

Eric Germann ekgermann at cctec.com
Fri May 30 00:24:17 EDT 2008


I have released my final collection of Maidenhead Grid Squares in ESRI 
Shapefile (.SHP) format.

Two and Four character grids can be found here 
<http://www.n1ics.net/node/15>.  There is also the ability to drill down 
at that location to download specific four character grid files based on 
the four character prefix (useful in EmComm and Search and Rescue 
overlays) with six character resolution.

A collection of all the four character grid files is located here 
<http://downloads.sourceforge.net/maidenheadshpfi/allgrids.tar.gz?modtime=1205334077&big_mirror=0>.  
Keep in mind, it's big at over 350MB compressed and there are 32,400 
files in the archive.  It is arranged in a directory structure such that 
you can drill down by grid square to get to the individual files.  Each 
grid square file is subdivied to the sixth character.  For example, the 
AA00.SHP file is subdivided into and labeled AA00aa, etc.

 I have tested these files in Xastir <http://www.xastir.org>, PostGIS 
<http://www.postgis.org> and qGIS <http://www.qgis.org/> and they have 
worked flawlessly.  I highly recommend qGIS if you want to make your own 
maps.  You can import a world base map, overlay it with grid squares and 
plot contacts.

As always, if you have questions, please let me know through the contact 
page at www.n1ics.net <http://www.n1ics.net>

73 de N1ICS




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