Orthophotomap

From Wikipedia, the free encyclopedia
Jump to: navigation, search
Orthophotomap of Rockport, Texas. The orthophotomap contains additional roads, terrain elevation and bathymetry layers.

An orthophotomosaic is a raster image made by merging orthophotos — aerial or satellite photographs which have been transformed to correct for perspective so that they appear to have been taken from vertically above at an infinite distance.[1] Google Earth images are of this type.

The document (digital or paper) representing an orthophotomosaic with additional marginal information like a title, north arrow, scale bar and cartographical information is called an orthophotomap or image map. Often these maps show additional point, line or polygon layers (like a traditional map) on top of the orthophotomosaic. A similar document, mostly used for disaster relief, is called a spatiomap.

References[edit]

  1. ^ American Congress on Surveying and Mapping, American Society for Photogrammetry and Remote Sensing (1994), Glossary of the Mapping Sciences, American Society of Civil Engineers, p. 370, ISBN 9780784475706