U.S. Geological Survey (USGS)

USGS DLG of rivers

USGS DLG of contour lines (hypsography).

USGS digital elevation (DEM).

USGS scanned, rectified topographic map called a digital raster graphic (DRG).

USGS digital orthophoto quadrangle (DOQ).

USGS geologic map

Landsat 7 satellite image from which land cover information can be derived

Satellite image data in figure 3 have been analyzed to indicate classes of land uses and cover

Part of a census data file containing address information

Part of a hydrologic data report indicating the discharge and amount of river flow recorded by a particular streamgage that has a known location.

Data integration is the linking of information in different forms through a GIS

An elevation image classified from a satellite image of Minnesota exists in a different scale and projection than the lines on the digital file of the State and province boundaries.

The elevation image has been reprojected to match the projection and scale of the State and province boundaries