Using Distance Accumulation on a sphere : how to avoid projection "edges" ?

MartinKr — Fri, 10 Nov 2023 13:51:45 GMT

Hello everyone,

(Working with ArcGIS Pro 3.1.1)

I try to generate Distance Accumulation rasters from various points on the globe, and I notice that distances do not "cross" the edge of the map projection. The shorter distance from Americas to Asia if not accross Pacific.

Any suggestion on how could I ask the tool to work with geographic systems and not projected ?

ere the parameters used :

with arcpy.EnvManager(outputCoordinateSystem='GEOGCS["GCS_WGS_1984",DATUM["D_WGS_1984",SPHEROID["WGS_1984",6378137.0,298.257223563]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]]'): out_distance_accumulation_raster = arcpy.sa.DistanceAccumulation( in_source_data="path_to_input", in_barrier_data=None, in_surface_raster=None, in_cost_raster="path_to_cost_surface", in_vertical_raster=None, vertical_factor="BINARY 1 -30 30", in_horizontal_raster=None, horizontal_factor="BINARY 1 45", out_back_direction_raster=None, out_source_direction_raster=None, out_source_location_raster=None, source_initial_accumulation=None, source_maximum_accumulation=None, source_cost_multiplier=None, source_direction="", distance_method="PLANAR" ) out_distance_accumulation_raster.save(r"path_to.gdb/output_name")

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Using Distance Accumulation on a sphere : how to avoid projection "edges" ?