Hot answers tagged analysis
If your facilities and incidents are both feature layers, and you only care about finding the closest (and not 2nd closest, 3rd closest, etc.) then you can just run Spatial Join. Set your incidents as the target_features, facilities as join_features, and closest as the match_option, and it will join the attributes of the nearest facility to each incident.
Surrounding topography does have an effect on each pixel as it is analyzed using the solar analysis tools. From ESRI's own documentation: ...accounts for atmospheric effects, site latitude and elevation, steepness (slope) and compass direction (aspect), daily and seasonal shifts of the sun angle, and effects of shadows cast by surrounding ...
Have you looked at Service Area and/or Closest Facility in the Network Analyst Toolbox? This may be helpful. The map you posted has desire lines, which you can find in the Business Analyst Toolbox. Another option, if you know which point goes to which facility, is Envelope to Polygon.
GDAL doesn't have a ready-made utility for this that I know of. You would probably have to script something. However, for filling sinks, GRASS has the r.fill.dir and r.terraflow functions. SAGA and some other FOSS raster GIS packages also have sink filling functions too. Spikes pose a different problem and you'll need to consider a median filter and/or ...
The best is to resample the raster and have hillshade models of different scales. 90m resolution of the whole US will shade correctly but when you view the whole image the resampling algorithm for viewing in the screen will/might cause pixellation. If you view at about 1:1 screen scale you should see a good hillshade. Also hillshading does not work really ...
Only top voted, non community-wiki answers of a minimum length are eligible