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Geotagged photograph

From Wikipedia, the free encyclopedia

A geotagged photograph is a photograph which is associated with a geographic position by geotagging. Usually this is done by assigning at least a latitude and longitude to the image, and optionally elevation, compass bearing and other fields may also be included.

Above: Map showing photographer's view (59.3275°N 18.0725°E / 59.3275; 18.0725) of two buildings at a distance of 270 meters (59.3284°N 18.0772°E / 59.3284; 18.0772) and 1200 meters (59.3291°N 18.0931°E / 59.3291; 18.0931). Below: Which of the three locations should be associated with the resulting photo?Nationalmuseum.jpg

In theory, every part of a picture can be tied to a geographic location, but in the most typical application, only the position of the photographer is associated with the entire digital image. This has implications for search and retrieval. For example, photos of a mountain summit can be taken from different positions miles apart. To find all images of a particular summit in an image database, all photos taken within a reasonable distance must be considered. The point position of the photographer can in some cases include the bearing, the direction the camera was pointing, as well as the elevation and the dilution of precision (DOP).