title: Where to get Terrain Data - both free and paid?
body: <p>Where can you get terrain data?  What resolution data can you get for free?  What resolution data can you get when you buy the data?  How much is that data?  I found <a href="http://www.webgis.com/terr_world.html" rel="noreferrer">this site</a> that has free terrain data.  The resolution is 30m x 30m.  Is that the best that can be found for free?</p>