the collective features on the surface of the earth, including relief, hydrography and cultural features. Topographic maps of the U.S. are produced by the U.S. Geological Survey for GIS use. In public health, topographic maps can reveal disease associations with elevation, surface water, wind direction, solar exposure, time and other factors.
(a) The surface configuration of the Earth or of another planet or a satellite, or of a portion thereof, including the planimetric and altimetric aspects, i.e. the situation in the map plane and the relief. (b) Description and graphic representation of the above.
The disposition of the major natural and man-made physical features of the earthâ€™s surface, such as would be entered on a map. It would include contour-lines of elevation although the term is often used to denote elevation characteristics.
Configuration (relief) of the land surface; the graphic delineation or portrayal of that configuration in map form, as by contour lines; in oceanography the term is applied to a surface such as the sea bottom or surface of given characteristics within the water mass.
The elevation and slope of the land as it exists or is proposed. It is represented on drawings by lines connecting points at the same elevation. Typically illustrated by dashed lines for existing topography and solid lines for proposed.
A term used in Cartography (map-making) which describes the physical features of the landscape, both natural and man-made. In Radio Communications terms, Topography is important in the way in which it may affect the propagation of Radio Waves. A knowledge of the local Topography is useful when deciding where to site aerials.
The accurate and detailed description or drawing of places or items and their surface details. Used to determine the corneal profile in order to program the computer for refractive correction as well as for post-operative corneal analysis.
The configuration of a surface including its relief. In oceanography the term is applied to a surface such as the sea bottom ( cf. Bathymetry) or a surface of given characteristics within the water mass.
The representation of a portion of the earth's surface showing natural and man-made features of a give locality such as rivers, streams, ditches, lakes, roads, buildings and most importantly, variations in ground elevations for the terrain of the area.
The graphic depiction of the shapes and features, and especially the elevations, of an area. This is usually depicted on maps and charts, using printed lines that represent the contours of the surface. Biodiversity is strongly linked to the elevation of the environment, so a knowledge of topography is essential to researchers. For decades, topographical maps were created by land-based surveyors, using altimeters and transits. Now, stunning maps are produced by remote sensing from high-flying airplanes and satellites and even radar. These maps can show not only elevation and land-based features such as streams and lakes, but also (using colors) the sorts of vegetation growing below.
The configuration of the earth's surface and the position of its natural and manmade features. The features of a place or region. Examples are: rivers, mountains, hills, creeks, roads, fences, power lines, swamps, etc.
A digital image processing device used to measure the shape of the cornea. It is used before refractive surgeries to identify certain individuals with conditions making refractive surgery an unacceptably unpredictable undertaking. It can also be used after surgery to identify unusual cornea shapes during the healing process.