Hi,
I downloaded DEM data in GeoTiff format from http://seamless.usgs.gov/.
I wanted to add it to the OSM tile map in qlandkartegt, but it complains
about a mismatch of projections.
"DEM projection does not match the projection of the basemap"
Wouldn't it be nice to be able to convert the tiff into the correct
projection or is there something that would need a complicated decision
step. The reason why I am asking is that I spend a significant amount of
time to figure out things like:
1. what is the projection of the loaded tiff: GEOGRAPHIC
2. what is the projection of the basemap: <still no clue, but
apparently no mercartor>
3. how to convert the tiff once I know 1 and 2
I know it should be possible with gdalwarp. But the commandline
interface of this thingie is a little complex -- a working call looks
more like an essay than a command.
The problem is of course the same for a raster topo map of the same area
that I tried (from topoquest).
For now I gave up -- it is already late anyway.
So here is my wishlist:
Since QLandkarteGT needs to know 1) and 2) to decide that the
projections don't match, it is probably simple (without looking at the
code) to put that info into the error message.
Moreover, I tiny pointer how the GDAL call would look like would also be
nice. I know that Oliver is not fond of calling 3rd party commandline
tools from within QLandkarteGT, but even a schematic outline (with a
disclaimer that it probably is already outdated) would be very much
appreciated by GDAL ignorant people like me.
I wonder whether the geo referencing GUI in QLandkarteGT could be reused
to re-project geotiffs as well...
Sorry for the long blurb.
Good night,
Michael
PS: I'd be glad, if anyone could provide me with a pointer to the GDAL call.
Thanks.
--
GPG key: 1024D/3144BE0F Michael Hanke
http://mih.voxindeserto.de
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