Hydrologic Applications of LiDAR Data, Lecture 4 

From the "Conservation Applications of LiDAR Data" series. Additional lectures, exercises and other training materials are at z.umn.edu/lidar.
Time points: 0:00 - flow accumulation to define a stream; 1:45 - problems with a DEM shown by flow accumulation; fix by breaking digital dams or filling sinks. 4:43 - Correction methods; 5:03 - breaklines (vector approach); 6:25 - AGREE (raster subtraction); 7:06 - ANUDEM (a blend of raster and vector). 8:49 - Caveats: Corrections are resolution dependant and scale matters.

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