Pascal Ehlert wrote:
I'd like to use one of the new NASA Blue Marble Images (which are
available in TIFF format) for the
background of my map.
Is that TIFF georeferenced (a geotiff?), or else do you have a worldfile
for it? If not, then that data is just floating in nowhereville, well
outside of your browser's view. :)
If I recall, the Blue Marble stuff is not a geotiff (use gdalinfo on it
to see if it has a projection and a center and all) and you'll have to
create your own world file. It's a simple text file that describes the
pixel coordinates in order for the data to have a spatial location.
Don't worry, though: just punch "world file format" into Google and
you'll be on your way in a few minutes. If not, ask back. :)
--
Gregor Mosheh / Greg Allensworth
System Administrator, HostGIS cartographic development & hosting services
http://www.HostGIS.com/
"Remember that no one cares if you can back up,
only if you can restore." - AMANDA
