Please mention the Projection of DEM image

Question

Please mention the Projection of DEM image

CaptainDredge opened this issue 6 years ago · 3 comments

Answer 1 · 2018-10-25T02:25:17.000Z

@cczhu when you have a moment maybe you know the answer to this?

Answer 2 · 2018-10-26T20:29:17.000Z

@silburt @cczhu I downloaded 16-Bit GeoTiff image of Mars from USGS Mola Blended Global DEM and also downloaded Mars Crater Catalog by Stuart Robbins
I tried to combine both by using Input_data_gen.py. I downloaded the image in simple cylindrical projection with Lattitude/Longitude limits as +-180/+-90. So, I changed the limits and the radius but the generated masks are all wrong. I couldn't identify what's going wrong after debugging the code for hours.

Answer 3 · 2018-10-29T02:41:18.000Z

@Prabhat-IIT DeepMoon assumes the DEM is a Plate Carree (i.e. simple cylindrical) projection. I'm not sure I understand what you mean by the generated masks being wrong. Are the generated images and masks themselves fine, but there's just no correlation between the craters in the image and rings in the mask? If so, have you checked whether this is a mismatch between the DEM and crater catalog by plotting the craters on top of the DEM (eg. using cartopy)?