Note: this is development code and will not run without the following:
- An xml alerts file. The alerts feed [1] has some issues which need to
be resolved before much more development is done. These include
missing data (hazard's weather outlook), missing lat-lon polygons (for
SVR/TOR warnings), unknown sorting order, and inconsistent use of fips
and NWS warning area codes.
- A fips polygons file. The original was found as a link from the CAP
cookbook/wiki [2]. However, this contained a convex hull of each
county, which is not entirely useful. Andy Spencer created two more
which are hopefully a little more useful but contain a larger number
of points and require tessellation to use [3].