I have a global elevation raster in latitude and longitude. I want to use it as the basemap in a world projection system (e.g., Mollweide, Robinson).
When I set the coordinate system to Mollweide (or Robinson) and enable on-the-fly projection, the global topography raster map disappears until I zoom in far enough that there is no "no data" area left in the display. In other words, I need to make sure that the display doesn't include any of the curved map projection edges.
I have tried using gdalwarp outside of QGIS as well, and then importing the already-projected raster, using gdalwarp:
gdalwarp -s_SRS 'EPSG:4326' -t_srs '+proj=moll +lon_0=0 +x_0=0 +y_0=0 +datum=WGS84 +units=m +no_defs' coarse_6am_topo_021000.tif out.tif
However, this projected map cuts off the north polar region (not sure why this is happening either), so I am not sure what to do -- it would be nice if the on-the-fly reprojection worked!