Back to resources
gis is a lightweight geographical information system. (If you're looking
for something more lightweight eg for displaying moving maps on an
embedded navigation system - have a look at map3)
gis can do just about everything it should except change the projections
of raster data - it has all the hooks I've never needed it yet.
Gis can
-
overlay different raster data
-
convert between a bewildering variety of coordinate systems
-
pan and zoom quickly and efficiently
-
handle very large images [it's running on a 1Tb dataset happily here]
-
print [and I mean print properly] gis can generate PPM files up to any
size, I regularly generate 2Gb ppm files with gis. [you may want to look
at dither if your printer won't take
4Gb postscript files.
-
be completely scripted
-
overlay simple vector data on your map
Here's a screen shot - unfortunately because the licenses that the data come
with don't allow redistribution - I've blured the maps
Gis currently has handlers for the Irish OS maps, the British OS maps
at 5,50,100 and 200m/pixel, cities revealed and spaceimaging data at 0.25,1.25,6.25
and 25m/pixel, various A-Z maps and various other data.
Files for the project are avaiable here. Contact
me for more information - like how gis expects its data layed out.