Orthophotomap

Orthophotomap

 

a photographic map of a locality on an exact geodetic basis. An orthophotomap is obtained through an aerial photographic survey and the subsequent conversion of the aerial photographs from a gnomonic to an orthogonal projection by the efficient method, developed in the mid-1960’s, of differential orthogonal photo conversion. In contrast to the well-known method of converting aerial photographs by zones, the new method automatically eliminates the distortions in an aerial photograph caused by the locality’s relief and by deviations of the camera’s axis from vertical during the survey. This is effected by the successive projection of the image being converted in the smallest possible sections by means of special devices called orthophotoprojectors. Orthophotographs, that is, aerial photos converted by this method, make possible the compilation of orthophotomaps for any region, thus significantly expanding the use of material from aerial photographic surveys for topographical, geological, and other planning and surveying purposes.

L. M. GOL’DMAN

References in periodicals archive ?
Moreover, the approximate share of areas covered by woody vegetation (of any type) and, separately, the approximate share of all built-up areas were counted with the use of the orthophotomap available on http://mapy.
The Belarussian frontier zone was taken from the orthophotomap and topographic maps of scale 1:50,000.
In the second step, the 3D model based on the non-filtered data set is combined with the orthophotomap to visualise the territory (Fig.
Also the orthophotomap of the whole area was provided.
The Bulgarian Agriculture Minister Miroslav Naydenov has announced that the deadline for the update ofA 60% of the country's territory forA the existingA orthophotomap of is January 31, 2011.
The information, in paper format, was scanned and TIFF files were created, which were later corrected using the orthophotomap and the most recently updated vectorial map of the municipality of Espinho using ArcGIS version 9.
Highlights of this period would include the compilation of 100 scale plan/topo and 200 scale orthophotomap map series of the site and surrounds, the addition of a handheld GPS with sub-meter accuracy and ArcPAD software that enabled the users to collect their own data, the use of GPS and ArcPAD to capture the utilities layers into the system, the deployment of ArcReader making GIS data accessible to all Badger staff at no cost to the budget, the creation of a GIS newsletter, a three-fold increase in workstation GIS users and training, and the institution of a GIS Steering Committee to evaluate feedback and guide future system development.
For example, the orthophotomap information is essential for the updating of the topographic database, and the topographic elevation information is critical for the generation of the orthophotomap.
b) True position defined by locating the coordinates of the units on the orthophotomap using GIS software.
An orthophotomap of the terminus of Thompson Glacier at 1:5000 scale, based on the photography of 1977, has recently been published (Institute of Cartography, 1998).
The contract is drawn up by the Contractor digital orthophoto from the processing of panchromatic and multispectral satellite scenes with very high spatial resolution, together with the sampling technical 1) digital orthophoto radiometric resolution of 16 bits per channel (hereinafter referred to as ORTO_16bit)2) digital orthophoto radiometric resolution of 8 bits per channel (hereinafter referred to as ORTO_8bit) collectively orthophotomap for disjoint areas with a total area of ?
By superposing this scenario onto the 2010 orthophotomap one is able to locate the areas possessed of the highest urbanization potential, as well as observe the manner in which the green areas are being preserved (Fig, 6).