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Joseph Davis' Map Catalog

Wednesday, December 2, 2009

DEM


A DEM is a digital representation of ground surface topography or terrain.  It is represented as a grid of squares.  They are commonly built using remote sensing techniques from land surveying.  DEM's are often used in geographic information systems and relief maps.


http://tahoe.usgs.gov/images/4ds/dem_zoom.jpg
Posted by jrd09j at 7:12 PM

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  • ▼  2009 (47)
    • ▼  December (47)
      • Star Plots
      • Correlation Matrix
      • Similarity Matrix
      • Steam and Leaf Plot
      • Box Plot
      • Histogram
      • Parallel Coordinate Graph
      • Triangular Plot
      • Windrose
      • Climograph
      • Population Profile
      • Scatterplot
      • Index Value Plot
      • Lorenz Curve
      • Bilateral Graph
      • Bivariate Choropleth Maps
      • Unclassed Choropleth Maps
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      • DOQQ
      • DEM
      • DLG
      • DRG
      • Isopleths
      • Isopach
      • Isohyets
      • Isotachs
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      • LIDAR
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      • Black and White Aerial Photo
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