Bump Map Toolbox: Output Issue
I've recently added the bump map toolbox and ran the scripts without issue several times as I fine tuned the settings to better represent the vegetation I was working with. I'm not sure what happened, as I did not change or alter the tools, but all the output files now look like the attached image (top part of the image is zoomed out, bottom is zoomed in). I tried removing the toolbox and adding it again, emptying the directories, adding the toolbox from a different directory...but no luck.
Mapping Center Answer:
If you take a look at the Bump Map presentation we gave at NACIS in 2009 (see the Mapping Center Other Resources - Presentations page and scroll down to the "ArcGIS Bump Map Model" presentation), you will see that this is a function of resolution. In essence, the problem relates to the resolution of the DEM being larger than the resolution of the bumps so it has to be resampled. Our bump map tools should take care of this problem as we use the correct resampling method in the tools (bilinear interpolation rather than the default method of nearest neighbor). Hopefully you are not getting these results when using our tools!
If you did, try this: First calculate the resolution at which the tool will NOT resample the DEM. Use this formula:
(radius * 2)/11
to find the smallest radius you can use without causing the DEM to resample. Set your radii to that value or larger and see what happens. Let us know so that we will can determine if we have to review the tools for errors! Thanks!
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