topo4/data/supai/README

This data is for the Supai trail through Havasu Canyon, a branch of the
Grand Canyon.  Elevation data is from USGS 10 meter SDTS DEM files.
The flightpath was derived from the USGS DRG encoding of the canyon trail.

Files are:
   *.tvg	TopoVista grid files, 65x65 points, 10m spacing
   trail.fp	flight path, Colorado River to Havasupai Hilltop

The data tiles found here are those read by TopoVista when following the
flight path with default window sizes.
