10 terms

Terrain Analysis (GIS class)

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terrain analysis
used in a number of applications such as snow cover evaluation, soil mapping, landslide delineation, soil erosion etc
terrain mapping uses
both raster and vector data
terrain mapping data types
-raster based DEM (digital elevation model)
-vector based TIN (triangulated irregular network)
(each can be converted back and forth into each other)
TIN
triangulated irregular network
-series of non-overlapping triangles
-faster
requires less space than raster
DEM
Digital Elevation Model
-represents a regular array of "elevation points"
most usgs users use
DEM
LiDAR
light detection and ranging
what is LiDAR
-aircraft mounted laser scanner
-onboard GPS
-creates high-res DEMs
-resolution of .5 to 2 meters
SRTM
Shuttle Radar Topography Mission
-type of DEM
to be cont.
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