17 Jan
2018
17 Jan
'18
10:24 p.m.
Hi Gerd, I have tried to verify, if aligned DEM is correct. I think algorithm have passed positively 2 tests: - reading height from map gives correct values, - changing bbox of source data doesn't change resulting map, even if it changes offset applied for aligning. The aligning changes a bit shading, but it is difficult to decide which version better. Only your map of Bolivia suggested, that nonaligned version could be better. Maybe we should investigate this one? For example we can oversample HGT using some good algorithm, like spline or lanczos, make unaligned map with oversampled HGT and compare changes in shadings? -- Best regards, Andrzej