Hi @ThomasDilts,
From your screenshot, I do not see what the bug is. Maybe this information will help.
In your example, suppose the source is a town. The resulting direction raster has the directions to the town for every location. Therefore from your screenshot, the results look correct. Cells to the north of the source should have a value representing the south because that is the direction back to the source.
The Euclidean direction output raster contains the azimuth direction from each cell to the nearest source. Euclidean direction assigns the direction of each cell in degrees to its nearest source. A 360-degree circle or compass is used, with 360 being to the north and 90 to the east; the remaining values increase clockwise. The value 0 is reserved for the source cells.
In Distance Accumulation, if cost is not introduced into the analysis then the Back Direction Raster is the same as the Direction raster from the Legacy Euclidian tool. However, if cost is introduced the values are still direction in degrees but, instead of pointing to the nearest source, the direction identifies the next cell along the shortest path back to the cheapest source while avoiding barriers if specified. Like Euclidean Direction the range of values is from 0 degrees to 360 degrees, with 0 reserved for the source cells. Due east is 90, and the values increase clockwise (180 is south, 270 is west, and 360 is north).
I hope this helps.
Thanks,
Liz
Product Engineer on the Spatial Analyst team
