I have a DEM cropped to the extends of a shapefile with different glaciers (see here for data: https://drive.google.com/open?id=1ERFdsqDGLH1a_FbxwawE_gPm0Au0Q9vT).
DEM <- raster("***Glacier_Clip1.tif") glaciers <- readOGR("***/01_Clipped_Data", "Glacier_Clip_Polygon") glaciers_sf <- st_as_sf(glaciers) glaciers_comb <- st_union(glaciers_sf) glaciers_comb <- st_cast(glaciers_comb, "POLYGON") glaciers_large <- glaciers_comb[st_area(glaciers_comb) > units::set_units(50000,"m^2")] glaciers_large_sp <- as(glaciers_large, Class = "Spatial") glaciers_ras <- mask(DEM,glaciers_large_sp)
For further calculations I need to differentiate between all the "inner cells" and the "inner boundary cells" inside the glacier directly at the border and the "outer boundary cells" directly outside (those are not part of the cropped raster, so I somehow need to get them from the original DEM).
This image shows the three cell types (light blue, grey and yellow) I need to address somehow. Is it possible to get them via
extract? Can anyone help me please?