orthophotograph

orthophotograph

[‚ȯr·thə′fōd·ə‚graf]
(geology)
A photographic copy, prepared from a photograph formed by a perspective projection, in which the displacements due to tilt and relief have been removed.

orthophotograph

(Data West Research Agency definition: see GIS glossary.) An aerial photograph in which the displacement of images has been removed and that has the distortion due to tilt, curvature, and ground relief corrected. It is a "scale corrected" aerial image, depicting ground features in their exact ground positions, in which distortion caused by camera and flight characteristics and relief displacement have been removed using photogrammetric techniques.
References in periodicals archive ?
On the next stage these errors free any photography is joined and then we obtain orthophotomap or orthophotograph [7].
Using old military survey maps and orthophotograph maps to analyse long-term land cover changes--Case study (Czech Republic).
We also thank Michael Hardy, GIS specialist at the University of Missouri Center for Applied Research and Environmental Systems for his assistance with the orthophotograph of Beaver Dam and GIS.
For example, an aerial digital orthophotograph can be used as a basis for digitizing.
With the ground control points collected from a georeferenced orthophotograph, the model was transformed to a real-world coordinate.
we would like to hear from specialist contractors who are able to supply the following services:- high resolution digital aerial photography suitable for the production of orthophotographs seamless orthophotograph coverages of each of the bailiwick islands
service for photogrammetric scanning, georeferencing, documentation, metadatacin, flight management system and cargo in the same fund municipal file aerial photography, under the National Plan of Air orthophotograph (PNOA) contract.
The Bailiwick is situated in the English Channel and has a combined land mass in the order of 80 kmA, but additionally has a significant coastline and intertidal zone.We are would like to hear from specialist contractors who are able to supply the following services: High resolution digital aerial photography suitable for the production of orthophotographs, Seamless orthophotograph coverages of each of the Bailiwick Islands, Digital Elevation and Surface Models, Acquisition and supply of Lidar survey data, Other related services such as:i) Thermal imagery.ii) NiR (near infra-red) imagery.iii) Photogrammetric surveys.
Contract award notice: Acquisition of airborne orthophotographs on the territory of the cacl (france-matoury: Aerial photography services)
Spatio-temporal dynamics of soil sealing have been regularly studied with the use of 20th century maps, aerial photographs, orthophotographs and satellite images (Ridd, 1995; Zhang, 2001; Wu, 2004; Moeller, 2005; Kampouraki et al., 2006, etc.).
In addition to NWI, GIS data used to evaluate the sites included the US Geological Survey's National Hydrography Dataset (NHD) and National Elevation Dataset, and 1-m color orthophotographs. We evaluated these 6 factors for sites identified by the GIS screening tool in an informal process.