I am working on creating a cost catchment based on Tobler's equation in ArcGIS10.1.
I feel confident in my cost surface; it produces a raster where each cell equals the time in hours that it would take to cross the cell dependent on slope.
Next I used the Cost Distance tool to create a raster of the accumulated time it would take to reach each cell from a source location in the hope of then creating a contour map of 1hr hiking times from the source location.
However, my cost distance outcome values are significantly greater than they should be. A point I know should only take an hour to get to produces a cost distance value of 30.
I have concluded that I am somehow using this tool incorrectly or interperating the results incorrectly. Any suggestions would be appreciated!
أكثر...
I feel confident in my cost surface; it produces a raster where each cell equals the time in hours that it would take to cross the cell dependent on slope.
Next I used the Cost Distance tool to create a raster of the accumulated time it would take to reach each cell from a source location in the hope of then creating a contour map of 1hr hiking times from the source location.
However, my cost distance outcome values are significantly greater than they should be. A point I know should only take an hour to get to produces a cost distance value of 30.
I have concluded that I am somehow using this tool incorrectly or interperating the results incorrectly. Any suggestions would be appreciated!
أكثر...