How basic terrain surfaces are derived from a DEM, and displaying the DEM to accentuate hydrologic features.
From the "Conservation Applications of LiDAR Data" series. Additional lectures, exercises and other training materials are at z.umn.edu/lidar.
Time points:Terrain derivatives: 0:25 - slope; 2:20 - aspect; 2:48 - flow direction. Displaying DEM data: 4:08 - Hill shade; 7:36 - hill shading methods; 9:44 - problems with hill shading; 10:41 - displaying slope with hillshade; 11:10 - displaying aerial photo with hillshade; 12:00 - "Fire" on hillshade: A display method to highlight hydrography.
25 июл 2013
