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Orthophoto Maps

Since 1998, Pima Association of Governments has contracted for three aerial flights, covering over 3,200 square miles in all of eastern Pima County and parts of rapidly growing southern Pinal County. The images and terrain data allow public and private sector planners to use the images and data to help determine the following:

  • inventory infrastructure
  • transportation improvements
  • land-use projects
  • environmental conditions
  • flood plain boundaries for maps
  • public communications requirements

Orthophoto Metadata

A digital orthophoto is a computer-generated image of an aerial photograph or aerial digitial image in which displacements caused by camera orientation and terrain have been corrected and projected to a standardized map projection. Digital orthophotos are available in either black and white (gray scale), color (red, green and blue), or multi-spectral (red, green, blue, near infrared).

A Digital Elevation Model (DEM) describes the elevation of points and break lines of the bare earth surface, but does not support contour modeling. A Digital Terrain Model (DTM) describes the elevation of points and break lines of the bare earth surface with additional data to describe ridgelines, peaks and valleys, etc., allowing it to be used for accurate contour modeling.

Orthophoto Coverage

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