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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