To calculate the DEM of Difference between two DEMs of different time scales e.g. DEM1 of 2000 AD and DEM2 of 2019 AD, the two DEMS must be co-registered with each other. I am not working on the glaciers though. I am working on landslides and floods in elevation between 2000 m.a.s.l to 3500 m.a.s.l in Nepal Himalaya.

Please can someone tell me any open source software which can perform this task. Anything using R or Python or any other software directly dedicated for co-registration in lesser Himalaya.

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