Geography 1400F/G Lecture Notes - Lecture 2: Deductive Reasoning, Remote Sensing, Environmental Science
5 Dec 2012
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Document Summary
Maps can only express one or a few pieces of information. A geographic information system (gis) integrates hardware, software, and data for capturing, managing, analyzing, and displaying all forms of geographically referenced information. Takes a lot of the cost out of mapmaking because you do not have to print it. What"s on the world influences what we can collect about the world. It is able to manipulate actual data that you have collected. It takes people or machines to conduct analysis. Raster (or grid: covers an entire area of study, cells/pixels (like a digital picture, unique values, if you take an aerial picture, that is a raster image of the ground, ex: elevation, land use, climate data. Vector and raster used together: the power is layering, ex: google maps. Attribute data (non-graphic): descriptive information about the geographic entities (names, addresses) and spatial relationships including connectivity, adjacency, and contiguity.
