GEOG 170 Study Guide - Tabula Rogeriana, Flowchart, Map Projection
Document Summary
What is a map: spatial representation of environment; authored graphic representation of geographic features, concepts, conditions, processes and events. Map scale: systematic reduction of what is on the ground to what is on the map. Map projection: transformation of 3d to 2d: scale bar: proportion of map to environment mapped. 4 processes of abstraction: selection: what to show, classification: put values into groups, simplification: cannot show level of detail in natural world because of reduced scale, symbolization: variables through use of symbols. Reference: used to emphasize the location of spatial phenomenon (roads, houses, streams) ** focus on position. Thematic: emphasize spatial distribution of one or more geographic attributes/variables. 4 types of thematic: dot density, choropleth, isoline, flow: dot density: dots used to represent variation in density of variables distributions, choropleth: show distance summarized on delimited areas. Class 2 and 3: history and mental mapping.
