Stereo Definitions for Land Surveyors

stereocomparator [PHOTOGRAMMETRY]—A stereoscopic instrument for measuring parallax which usually includes a device for measuring photograph coordinates of image points

stereocompilation-1 The procedure of producing a map from aerial photographs by means of stereoplotting instruments. 2 The map data produced with stereoplotting instruments.

stereogram—See stereoscopy; overlapping pair [PHOTOGRAMMETRY].

stereographic map projection—See map projection.

stereometer—A measuring device comprising a micrometer movement by which the separation of two index marks can be changed in order to measure parallax difference on a stereoscopic pair of photographs. Also called “parallax bar.”

stereometric camera—See camera, stereometric.

stereometric map—See map, stereometric.

stereomodel—A model of the overlapping portion of a stereoscopic pair of images, formed by the intersection of rays from corresponding points.

stereophotogrammetry—See photogrammetry; aerial photography.

stereoplotter—A plotting instrument enabling measurements to be made on a stereoscopic model, as well as the transfer of these measurements by mechanical or optical linkages to the plotter in order to compile a map or obtain other spatially related information.

stereoplotter, softcopy—A stereoplotter which is designed for use with digital rather than hardcopy photographs.

stereoscope—An optical instrument used for viewing two related photographs or diagrams simultaneously to obtain the mental impression of a three-dimensional model.

stereoscopic fusion—See stereoscopy; overlapping pair [PHOTOGRAMMETRY].

stereoscopic image—See stereoscopy; overlapping pair [PHOTOGRAMMETRY].

stereoscopic model—See stereoscopy; overlapping pair [PHOTOGRAMMETRY].

stereoscopic pair—See stereoscopy.

stereoscopic plotting instrument—An instrument for compiling a map or obtaining spatial solutions by observation of stereoscopic models formed by stereoscopic pairs of photographs.

stereoscopic principle—The formation of a single, three-dimensional image by binocular vision of two photographic images of the same terrain taken from different exposure stations; photographic mapping. With proper equipment, all measurements needed in map construction can be made from this visual model.

stereoscopic vision—See stereoscopy; overlapping pair [PHOTOGRAMMETRY].

stereoscopy—The science and art that deals with the use of binocular vision for observation of a pair of overlapping photographs or other perspective views; the methods by which such viewing is produced. See also overlapping pair [PHOTOGRAMMETRY].

Source: NSPS “Definitions of Surveying and Related Terms“, used with permission.

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