Base Information

• Base data, acquired from the U.S.G.S., is a wealth of information that is necessary for a wide variety of applications of the GIS.

  • Types of Base Data
    • DOQQ’s – Digital Orthophoto Quarter Quadrangle
    • DRG’s – Digital Raster Graphic
    • DLG’s – Digital Line Graph
    • DEM’s – Digital Elevation Model

Notes: