GEOG106 Lecture Notes - Lecture 2: Geographic Information System, Remote Sensing Systems, Thematic Mapper
3 Apr 2017
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Document Summary
Intro: earth"s surface would be difficult to comprehend and analyze without tools to systematically organize the complex and varied real world data, many kinds of tools used in geographic studies. Mapping geographic features are often an essential first step toward understanding the spatial distribution and relationships of features and processes. Tools used in geographic studies: globes and maps, global positional systems (gps, remote sensing systems, geographic information systems (gis) Globes: best way to portray earth, advantages of globes: accurately convey the spherical shape of earth, accurately show spatial relationships of earth"s surface, maintaining correct size, shape, distance, and direction relationships of features, disadvantages of globes: Only see a hemisphere at a time. Cannot contain much detail (at very small scale) Maps: flat representation of the earth"s surface, basic attribute of maps is their ability to show distance, direction, size, and shape in their horizontal (two dimensional, 2d) spatial relationships.
