Geographical Information System: GIS - Essay Example

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The essay "Geographical Information System: GIS" describes that geographers are able to analyse the material very effectively and have methods with which to lessen the mistakes that are made as much as possible. In doing so, they can effectively examine what will occur in the environment in the near future through the use of GIS…
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Geographical Information System: GIS
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Download file to see previous pages Data modeling is a manner in which a GIS, or Geographical Information System, can be used to analyse the Earth in two and three dimensions, so that altitude can be factored into any geographical information. For example, a GIS can use contour lines to show information on snowfall at different altitudes within a select area of the Earth. This is important because it lessens the chance of errors occurring when analyzing these sorts of areas, as different altitudes will certainly have different atmospheres. This is significant when mapping these areas as well, as the contours that are present will depict the area with different dimensions, with each of these dimensions having different possible levels of snowfall. What this method does is allow for these maps to be analysed in a much different manner, as they give much more information to the geographer than a traditional map. This information from the area is modeled into the map, so analysis is much easier than it would be otherwise. On top of this, these maps can include contour points that show the slope of a hill, where there is shade, and other things that occur when the elevation changes. Geographers can additionally assume where things like watersheds are present by analyzing slopes and snow packs in the area, since the water will settle somewhere if the slope is right on either side of it. Permanent streams can also be discovered through this system, as it is possible to analyse the contours in order to find the best route for surface water to travel which is significant because “at this stage, GIS and geomatics are commonly used, as in the case of flood risk areas, which is one of the major themes. But agencies feel relatively uneasy with using GIS within this procedure itself because they feel that it can mislead interpretations regarding zoning” (Stillwell et al., 1999, P. 175). This modeling can also be used to analyse how close things are to one another. Geographers can see if things are occurring close to other things, whether or not they are up or down hill, and whether the atmosphere is different in these areas, just by looking at a map. This is an example of geography being a spatial science because it is examining the relationship between these occurrences in nature. ...Download file to see next pagesRead More
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