Well, not using ImageMagick, but have you looked at MapServer? Web-
based, but it's made for exactly this sort of GIS data overlay, and
you can easily save an image off a web page. There are various
scripting interfaces to it also (Python, Perl, ...), so it doesn't
even have to go over the web. And there are a few front-ends that
smooth out some of the map-file and site design for you, and may have
image-saving features.
http://mapserver.gis.umn.edu/
Another possibility is GRASS GIS. A little steep learning curve
(it's a full GIS), but has presentation capabilities, and is fully
scriptable. Has some animation capabilities (including 3D).
http://grass.itc.it/
One GIS I've heard of is GMT. It's supposed to have excellent
PostScript output, which could be fed into ImageMagick.
Imagemagick doesn't really have any geospatial capabilities, so you'd
be 'reinventing' the stuff already done in the above software. Or in
the GIS the 'other person' is working on.
On Jun 12, 2006, at 4:59 PM, Geoffrey E. Quelch wrote:
Dear All,
I am tasked with generating image files, either in PNG or JPG, that
contain
base Geographic data, county/state boundaries, roads rivers etc.
with an
overlay of interpolated data, such as an air temp field.
I am currently using the C++ ImageMagick API in test mode for the
overlay
only, to get an idea if we're generating the correct interpolated
field
spatially, I now want to add the geographic underlay.
I have researched a number of possible approaches but wanted to
poll this list
to see if anyone has implemented a similar functionality using the C++
ImageMagick API and how they did it before I re-invent the wheel.
If you would like to share your implementation strategy to me
privately, I'll
summarize and post to this list.
I know I can provide this as a service from the web, but I need to
generate an
image file (and probably movie) for use in various static uses. We
are also
building a separate GIS (someone else, thankfully) to provide an
interactive
capability with this data but we'd like separate static image/movie
snapshot
ability.
I have looked through the last year of archives, but didn't see
anything like
this. If there is something in the archives, please let me know
when it was.
-----
William Kyngesburye <[EMAIL PROTECTED]>
http://www.kyngchaos.com/
"Mon Dieu! but they are all alike. Cheating, murdering, lying,
fighting, and all for things that the beasts of the jungle would not
deign to possess - money to purchase the effeminate pleasures of
weaklings. And yet withal bound down by silly customs that make them
slaves to their unhappy lot while firm in the belief that they be the
lords of creation enjoying the only real pleasures of existence....
- the wisdom of Tarzan
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