EAS221 Lecture Notes - Lecture 4: Bathymetry, Contour Line, Centimorgan
24 Sep 2016
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Document Summary
Not only is it easy to lie with maps, it"s" essential . Maps don"t reflect reality, but they select from it. In common usage the terms large scale and small scale have different meanings: scale with respect to level of detail (preferred by cartographers) . Large amount of detail = large scale map. Small amount of detail = small scale map **midterm question, which one is larger than the other: scale with respect to spatial extent. Scale is presented as: a graphic, a proportion. 1cm = 1000m -> less useful due to zooming. Bathymetric maps -> ocean depths: both form, relief of surface. Thematic maps: give us the spatial distribution of a particular phenomenon or theme thematic. Gradation in tones/shadings represents differences in the properties of non-overlapping areas (usually a formal region; non overlapping: administrative boundary. Spatially extensive variables: true of the active area e. g. population. Spatially intensive: true when we assume homogeneity.
