I just want to preface this by saying that I am not a cartographer, geographer or GIS professional, I just recognize that this is probably the best place to ask my question. As I am none of those things this is most likely a case of "I don't know what I don't know". Having said that, my general question is
How can I project satellite imagery onto DEM data?
My specific case is this. I have written some python to load SRTM 30m GeoTIFFs into Maya and use them to write out .obj (poly mesh) files. This works (as far as I am able to tell) exactly right. This gives me something I can use to visualize the area I am working with even though the OBJ file will be replaced by flat geometry with the GeoTIFF used as a height field at render time. It also lets me paint on the terrain so that the end result colorwise can be art directed. I am now currently working on a project where I need the resulting geometry to match the 'real world' color as closely as possible. I thought I would find some appropriate satellite imagery and project it onto my geometry that I have extracted from the DEM tiff. I have downloaded files from Sentinel-2 but I can't figure out how to align the Sentinel data to the DEM data. I'm sure that I'm not the first person to ever attempt this, I just can't figure out how to do it.
I am using n3[4,5]_w11[8,9]_1arc_v3.tif from USGS
and the .jp2 files in IMG_DATA from
S2B_MSIL1C_20210408T184159_N0300_R027_T11SLU_20210408T221014 and S2B_MSIL1C_20210408T184159_N0300_R027_T11SMU_20210408T221014 also from USGS
specifically the 2,3,4 bands for visible light
My understanding is that the Sentinel data is in UTM while the DEM is latlong and I can't figure out how to get them aligned. If I can get the Sentinel data aligned to the GeoTIFF, the sentinel data should easily map correctly onto the .obj created from the same GeoTIFF.
I have googled a lot but, again, I don't know what I don't know and I fear that I'm just searching for the wrong thing and/or just asking the wrong question. My hope is that there are python libraries that will help me? This
looks encouraging but I don't know enough about the subject to understand how it applies to my usage case.