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And can you give an site about the details about satelittes and all pls

2006-08-19 18:22:15 · 9 answers · asked by siddharth kumar 2 in Science & Mathematics Geography

9 answers

Topography is a general term in geography that refers to the lie of the land, or various other characteristics of Physical geography in a region; this is usually expressed in terms of the elevation, slope, and orientation of terrain features. The understanding of these features is an integral aspect of geography, encompassing the practice of cartography, surveying, and GIS.

2006-08-19 18:31:14 · answer #1 · answered by Dougeatfresh :D 2 · 0 0

Topography, when considered as a soil-forming factor, includes the following: the geologic structural characteristics of elevation above mean sea level, aspect (the compass orientation of a landform), slope configuration (i.e., either convex or concave), and relative position on a slope (that is, from the toe to the summit). Topography influences the way the hydrologic cycle affects earth material, principally with respect to runoff processes and evapotranspiration. Precipitation may run off the land surface, causing soil erosion, or it may percolate into soil profiles and become part of subsurface runoff, which eventually makes its way into the stream system. Erosive runoff is most likely on a convex slope just below the summit, whereas lateral subsurface runoff tends to cause an accumulation of soluble or suspended matter near the toeslope. The conversion of precipitation into evapotranspiration is favoured by lower elevation and an equatorially facing aspect.

2006-08-21 09:23:31 · answer #2 · answered by Britannica Knowledge 3 · 0 0

Topography has to do with map making, It involves cartography, surveying and GIS (geographical information system) Satellite photography is now commonly used for spactial depiction but surveying is still used to calibrate and size proof those pictures. Just google topography and see what all is out there, good luck.

2006-08-20 01:33:59 · answer #3 · answered by cuttlekid 3 · 0 0

well topography is like a science of maps.. and id say the best thing for that is to find a program called Google Earth

2006-08-20 01:27:47 · answer #4 · answered by elazrath 2 · 1 0

Topography is a general term in geography, derived from the Greek "topos" (place) and "graphein" (to draw), and refers to the lie of the land, or various other characteristics of Physical geography in a region; this is usually expressed in terms of the elevation, slope, and orientation of terrain features. The understanding of these features is an integral aspect of geography, encompassing the practice of cartography, surveying, and GIS. Maps are the most common communication tool for topographic information.

Relief often used to refer to the third dimension of a map whether in actuality (as in a "raised relief" map, or drawn, as with contours, hachures or shading) or the territory it describes. Most 18th and early 19th century national surveys did not record relief across the entire area of coverage, calculating only spot elevations at survey points. The United States Geological Survey (USGS) topographical survey maps included contour representation of relief, and so maps that show relief, especially with exact representation of elevation, came to be called topographic maps (or "topo" maps) in the United States, and the usage has spread internationally.


Example of a topographic map with contour linesThe understanding of topography is critical for a number of reasons. In terms of environmental quality, agriculture, and hydrology, understanding the topography of an area enables the understanding of watershed boundaries, drainage characteristics, water movement, and impacts on water quality. Complex arrays of topographic data are used as input parameters for [[hydrology transport model]s (such as the SWMM or DSSAM Models) to allow prediction of river water quality.

Understanding topography also impinges on soil conservation, especially in agriculture. Contour plowing is an established practice of enabling sustainable agriculture on sloping land, and is the practice of plowing along topographic lines.

Topography is critical militarily because it determines the ability of armed forces to take and hold areas, and to move troops and material into and through areas.

Topography is important in determining weather patterns. Two areas in proximity to each other geographically may differ radically in characteristics such as precipitation because of elevation differences or because of a "rain shadow" effect.

Tectonic processes and erosional processes are the determiners of topography. Tectonic processes such as orogenies cause land to be elevated, and erosional (and weathering) processes cause land to be worn away to lower elevations.

***
wikipedia is a good site but its an open encyclopedia so it's best to look for more sources in other search engines

2006-08-20 01:30:25 · answer #5 · answered by Anonymous · 1 0

Noun

1. topography - the configuration of a surface and the relations among its man-made and natural features
2. topography - precise detailed study of the surface features of a region

By Wordnet Dictionary

Topography: (?), n. The description of a particular place, town, manor, parish, or tract of land; especially, the exact and scientific delineation and description in minute detail of any place or region.
Topography, as the description of particular places, is distinguished from chorography, the description of a region or a district, and for geography, the description of the earth or of countries.

By Webster Dictionary

Topography, a term in geography, has come to refer to the "lay of the land", or the physiogeographic characteristics of land in terms of elevation, slope, and orientation. Terrain is a similar term, used more to describe the land itself than the study of it. "Relief" is often used to refer to the third dimension of a map whether in actuality (as in a "raised relief" map, or drawn, as with contours, hachures or shading) or the territory it describes.

The term is similar to topology, popularly thought of as the mathematical study of surfaces. This may help explain its adoption in the world of geographers. Its actual original meaning, from Greek "topos" (place) and "graphein" (to draw), relates to the description of places rather than broad regions, in topographic surveys. Most 18th and early 19th-century national surveys did not record relief across the entire area of coverage, calculating only spot elevations at survey points. The United States Geological Survey (USGS) topographical survey maps included contour representation of relief, and so maps that show relief, especially with exact representation of elevation, came to be called topographic maps (or "topo" maps) in the United States, and the usage has spread internationally.

The understanding of topography is critical for a number of reasons. In terms of environmental quality, agriculture, and hydrology, understanding the topography of an area enables the understanding of watershed boundaries, drainage characteristics, water movement, and impacts on water quality.

Understanding topography also impinges on soil conservation, especially in agriculture. Contour plowing is an established practice of enabling sustainable agriculture on sloping land, and is the practice of plowing along topographic lines.

Topography is critical militarily because it determines the ability of armed forces to take and hold areas, and to move troops and material into and through areas.

Topography is important in determining weather patterns. Two areas in fairly close proximity geographically may differ radically in characteristics such as precipitation because of elevation differences or because of a "rain shadow" effect.

Tectonic processes and erosional processes are the determiners of topography. Tectonic processes such as orogenies cause land to be elevated, and erosional (and weathering) processes cause land to be worn away to lower elevations.

Topography: The physical features of a surface area including relative elevations and the position of natural and man-made (anthropogenic) features.
Topography: The natural and constructed relief of an area.
Topography: The form of the features of the actual surface of the Earth in a particular region considered collectively.

2006-08-22 00:48:47 · answer #6 · answered by hamdi_batriyshah 3 · 0 0

topography comes under physical factors
it means whether a region is plain, mountainous, deserted ,polar ,etc.

2006-08-20 01:29:45 · answer #7 · answered by rainbow 2 · 0 0

How to read topo maps:
http://raider.muc.edu/~mcnaugma/Topographic%20Maps/topomapindexpage.htm

Look at topo maps in your area here
http://terraserver.microsoft.com/
http://www.topozone.com/


The lines on a topo map are line that are equal in level. A line above another line is higher.
# Thin brown lines represent contours or points of similar elevation. The closer together they are, the steeper the terrain.
# Contour lines form "v" shapes in valleys or along stream beds. The point of the "v" points uphill.
# Blue represents water.
# Green represents orchards and forested areas.
# Purple markings are those that have been "photorevised," or added to the map since the original map was published..
# Red areas represent urban areas, although the maps will often indicate special buildings of significance within the urbanized area.
# Roads and highways are represented in black and red.
# The scale on 1:24,000 topographic maps means that one inch equals 2000 feet

In the late 17th century, French finance minister Jean Baptiste Colbert hired surveyor, astronomer, and physician Jean Dominique Cassini for an ambitious project, the topographic mapping of France.

* He [Colbert] wanted the kind of maps that indicated man-made and natural features as determined by precise engineering surveys and measurements. They would portray the shapes and elevations of mountains, valleys, and plains; the network of streams and rivers; the location of cities, roads, political boundaries, and other works of man. (Wilford, 112)
After a century of work by Cassini, his son, grandson, and great-grandson, France was the proud owner of a complete set of topographic maps -- the first country to have produced such a prize.
Since the 1600s, topographic mapping has become an integral part of a country's cartography.
These maps (called topo maps for short) remain among the most valuable maps for government and the public alike. In the United States, the U.S. Geological Survey (USGS) is responsible for topographic mapping.
There are over 54,000 quadrangles (map sheets) that cover every inch of the United States. The USGS' primary scale for mapping topographic maps is 1:24,000. This means that one inch on the map equals 24,000 inches on the ground, the equivalent of 2000 feet. These quadrangles are called 7.5 minute quadrangles because they show an area that is 7.5 minutes of longitude wide by 7.5 minutes of latitude high. These paper sheets are approximately 29 inches high and 22 inches wide.
Topographic maps use a wide variety of symbols to represent human and physical features. Among the most striking are the topo maps' display of the topography or terrain of the area. Contour lines are used to represent elevation by connecting points of equal elevation. These imaginary lines do a nice job of representing the terrain. As with all isolines, when contour lines lie close together, they represent a steep slope; lines far apart represent a gradual slope. Each quadrangle uses a contour interval (the distance in elevation between contour lines) appropriate for that area. While flat areas may be mapped with a five-foot contour interval, rugged terrain may have a 25-foot or more contour interval. Through the use of contour lines, an experienced topographic map reader can easily visualize the direction of stream flow and the shape of the terrain.
Most topographic maps are produced at a large enough scale to show individual buildings and all streets in cities. In urbanized areas, larger and specific important buildings are represented in black though the urbanized area surrounding them is represented with a red shading. Some topographic maps also include features in purple. These quadrangles have been revised solely through aerial photographs and not by the typical field checking that is involved with the production of a topographic map. These revision are shown in purple on the map and can represent newly urbanized areas, new roads, and even new lakes.
Topographic maps also use standardized cartographic conventions to represent additional features such as the color blue for water and green for forests.
Several different coordinate systems are shown on topographic maps. In addition to latitude and longitude, the base coordinates for the map, these maps show UTM grids, township and range, and others.

2006-08-20 01:31:16 · answer #8 · answered by j123 3 · 0 1

topo has to do with location, graph with drawing thus topography is drawing locations. ( maps )
using google i found immediatly :
http://science.nasa.gov/Realtime/jtrack/3d/JTrack3D.html

2006-08-20 03:31:03 · answer #9 · answered by gjmb1960 7 · 0 0

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