GEOG 155 Lecture Notes - Lecture 2: Map Projection, Trimet, Contour Line
Document Summary
Map: graphic representation of the earth"s surface that helps to illustrate spatial. Show 4 key properties of a region: Maps are imperfect, since earth is a sphere. Thematic examples: religion maps, population maps, (showing some kind of theme/spacial division) Scale: ratio of the distance on map as compared to distance on earth"s surface. Maps are almost always smaller than the area they represent. Map scales are necessary to understand realistic distance on maps. Need several properties of maps to help with interpretation: Isoline: line connecting points of equal value. Contour lines: an isoline connecting points of equal elevation. Contour interval: difference in elevation between 2 adjacent contour lines. Elevation on one side of a contour line are higher/lower. Contour lines never cross one another, although they. Contour lines have no beginning or end; every line closes on itself, either on/off than on the other side may touch at a vertical cliff the map.
