cmd=f'ogr2ogr -dialect SQLite -sql "select ST_Difference(a.{geometry}, ST_Simplify(b.{geometry},500)) as {geometry} from {add_coastline_land_name} as a, \'{ADD_ROCK_OUTCROP}\'.{add_rock_outcrop_name} as b" -overwrite -f GPKG {ADD_ICE_SHEET}{ADD_COASTLINE_LAND}'
#cmd = f'ogr2ogr -dialect SQLite -sql "select ST_Difference(a.{geometry}, ST_Simplify(b.{geometry},500)) as {geometry} from {add_coastline_land_name} as a, \'{ADD_ROCK_OUTCROP_FIXED}\'.{add_rock_outcrop_fixed_name} as b" -overwrite -f "ESRI Shapefile" {ADD_ICE_SHEET} {ADD_COASTLINE_LAND}'