title: Is there a web service that provides terrain type at lat/lon?
body: <p>I'm wondering if there is a (free?) web service that will return the type of terrain at a specific latitude and longitude?</p>
  
  <p>The most important data I'm interested in is whether the point is over water or over land.  It would also be useful if I could find out if the point is in an urban area, desert, or in the rainforest, etc.  I might be able to guess that based on average rainfall/temperature for a location, or doing a reverse geocode.</p>