I'm having a projection workflow issue with QGIS, Natural Scene Designer, and AI (w MAPublisher) I need some help with.
My workflow is: download GMTED in WGS 84 for Australia > open in GIS and re-project to World Miller Cylindrical (EPSG 54003) > clip out center section > open clipped Miller DEM in NSD > generate shaded relief and save with .tfw > open SR in AI for map compilation.
The issue I'm seeing is that when I get the shaded relief into AI with MAPub, its not lining up. If I take the same SR from NSD and open it side by side in AI and QGIS with natural earth land as a reference I can see that in QGIS the SR lines up correctly while in AI it's off. The AI map view environment is set to Miller Projection and all other projected data seems to show up where it should.
This is some kind of projection interpretation error, but I can't figure out where the error is occurring (NSD or QGIS). Each program seems to interpret the projection of the same DEM data differently:
QGIS: EPSG 54003 World Miller Cylindrical (0 central meridian, 0 Easting, 0 Northing, Sphere radius 0).
ArcGIS: Custom Miller Cylindrical (0 central meridian, 0 Easting, 0 Northing, Spherical radius not shown).
AI MAPub: World Miller Cylindrical, Custom no EPSG. (0 central meridian, 0 Easting, 0 Northing, Sphere radius 0).
NSD: Miller Cylindrical (0 central meridian, 0 Easting, 0 Northing, Sphere radius 6370997 meters).
When the same WGS DEM is opened in ArcGIS and projected into Miller I get yet another projection offset, but different from the QGIS one. I can't test the SR placement as this clipped TIF image wont open in my copy of NSD 6 (I think NSD 7 Pro will open it though).
Any help is appreciated!