Significant improvements have been made to distance analysis in ArcGIS AllSource 2.5, and new distance raster functions that have enhanced capabilities were made available. In addition, the results of the operations are now calculated with greater precision and accuracy.
Since there are improved raster functions available, the Distance (Legacy) raster functions are deprecated and will be removed in a future release. The banner for each of these functions indicates that it is being deprecated. This topic identifies for each of these functions the function that replaces it.
Function organization and mapping
The new functions are as follows:
| Function | Description |
|---|---|
| Distance Accumulation | Calculates accumulated distance for each cell to sources, allowing for straight-line distance, cost distance, and true surface distance, as well as vertical and horizontal cost factors. |
| Distance Allocation | Calculates distance allocation for each cell to the provided sources based on straight-line distance, cost distance, and true surface distance, as well as vertical and horizontal cost factors. |
| Least Cost Corridor | Calculates the sum of two accumulative cost distance rasters with the option to apply a threshold based on percentage or accumulative cost. |
| Optimal Path As Raster | Calculates the optimal path from destinations to sources. |
The following table shows the mapping between the Legacy Distance raster functions and the replacement functions that offer enhanced functionality and performance:
| Legacy distance functions | New distortion-free distance functions |
|---|---|
Distance Accumulation with the Out back direction raster parameter specified | |
Distance Accumulation with the Out back direction raster parameter specified | |
Distance Accumulation with the Out source direction raster parameter specified | |
Distance Accumulation with the Out back direction raster parameter specified |