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Questions on working with elevation data and raster data from different sources
I am using GlobalMapper to generate raster data (in png format) to build
scenery for the Glider simulator "Condor The Competition Soaring Simulator".
The tools used to do scenery development have there own issues, but
discussion of them don't belong here.
This involves using SRTM3 .HGT files for elevation data from
and raster data from
a variety of sources.
So far, I've used been successful combining Landsat false color
images from https://zulu.ssc.nasa.gov/mrsid/
I can load the .SID files and the .HGT files into GlobalMapper.
The raster data and elevation data line up perfectly.
On the other hand, the Canadian government provides complete landsat data
as in GEOTIFF format including good old RGB (seperate images for each channel)
When I load the geotiff files with the .HGT files into GlobalMapper
they don't line up. I think the issue is that the geotiff files are
in UTM NAD83 projection (to be honest, I don't know what that means).
On the other hand, the raster data from https://zulu.ssc.nasa.gov/mrsid/
are UTM WGS84.
So, here is the question. How can I change the projection, or whatever I have
to do to get the HGT files and the GEOTIFF files to line up.
Thanks for your help!!!