regions can be analysed for various
characteristics, including:
 | Slope of Land | |
| Direction each slope faces (aspect) | |
| Viewsheds | |
| Shadows | |
| Watersheds | |
locations or regions. The entire United
States is covered by the US Geological
Survey; in some areas, more detailed
data is also available.
Any image can be projected via a
perspective view over the topography of
the region, as in the image at right that
shows the relationship between
topography and land use in Ithaca, NY.
of planning, and can be best seen by
combining information from older maps
that are georeferenced and overlayed
with modern information. History can be
explanatory, showing why things occurred
the way that they did; predictive, showing
trends that might continue into the future;
and suggestive, helping identify potential
opportunities for intervention.
