By Paul A. Longley, Michael F. Goodchild, David J. Maguire, David W. Rhind
This textbook presents a huge advent to the sphere of geographic info platforms and technology, protecting rules, strategies, and research equipment, in addition to functional administration concerns for utilizing GIS in companies. Authors Longley (U. university London, UK), Goodchild (U. of California at Santa Barbara, US), Maguire (Redlands, US), and Rhind (City U. London, united kingdom) current chapters on representing geography; the character of geographic info, georeferencing, and uncertainty within the part on ideas. software program, information modeling, facts assortment, growing and keeping geographic databases, and disbursed GIS are coated within the part on concepts. The part on research includes chapters on cartography and map construction; geovisualization; question, dimension, and transformation; descriptive precis, layout, and inference; and spatial modeling. administration matters are reserved for the top.
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Additional info for Geographic Information Systems and Science (2005)(22nd ed.)(en)(536s)
More sophisticated forms of knowledge include rule sets – for example, rules that determine what use can be made of wetlands, or what areas in a forest can be legally logged. 11 A wetland map of part of Erie County, Ohio, USA. The map has been made by classifying Landsat imagery at 30 m resolution. Brown = woods on hydric soil, dark blue = open water (excludes Lake Erie), green = shallow marsh, light blue = shrub/scrub wetland, blue-green = wet meadow, pink = farmed wetland. us to deﬁne wilderness, and to impose associated regulations regarding the use of wilderness, including prohibition on logging and road construction.
But like many other kinds of tools, such as computers themselves, their use raises questions that are sometimes frustrating, and sometimes profound. For example, how does a GIS user know that the results obtained are accurate? What principles might help a GIS user to design better maps? How can locationbased services be used to help users to navigate and understand human and natural environments? edu GIS data and methods. Taken together, we can think of them as questions that arise from the use of GIS – that are stimulated by exposure to GIS or to its products.
They include maximizing quality of life and satisfaction, and minimizing environmental impact. Sometimes the only way to work with such intangible objectives is to involve human subjects, through surveys or focus groups, by asking them to express a preference among alternatives. A large body of knowledge has been acquired about such human-subjects research, and much of it has been employed in connection with GIS. 4. Often a problem will have multiple objectives. For example, a company providing a mobile snack service to construction sites will want to maximize the number of sites that can be visited during a daily operating schedule, and will also want to maximize the expected returns by visiting the most lucrative sites.