Orthophoto
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An orthophoto is an aerial photograph that has been rectified such that it is equivalent to a map of the same scale. It is a photographic map that can be used to measure true distances, an accurate representation of the earth's surface.
External links
- Introduction to orthoimagery (http://www.esri.com/news/arcuser/1001/standup.html)
- National Digital Orthophoto Program (http://www.ndop.gov/)
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