steps

• web geodata > basemap (mount everest nepal)
• web geodata > get elevatoin > srtm
• file > export > stl
• convert to *.off to make it smaller size
• open *.off with openscad

marine_geo_gmrt

opentopography_srtm_90

expected result
can produced square map (bounding box) height and width are in same value
like saga produced

question
how to generate square map using blender gis ?

best regards