GEOG 1HB3 Lecture Notes - Universal Transverse Mercator Coordinate System, Openstreetmap, Google Earth
3 Feb 2014
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Document Summary
A map is a graphic representation of the geographical setting: shows where places and things are located. The purpose of a map is to record and communicate information about the environment: shows relationships between features, determines patterns formed by many types of distributions on the earth"s surface. Everybody can make and use maps: google earth and openstreetmap are examples that contribute to map-making, gis (geographic information systems) A topographic map is a 2d picture of a 3d surface: contour lines are used to represent height or elevation of geographical features. They measure slope, angles, and aspects and help users to visualize the variations among features: produced by putting multiple maps together to cover a large area, show the surface of the earth in great detail, provide elevation information. Colours and symbols are used internationally and contain unique colours to represent individual features: example: blue is water, green is vegetation. Marginal information contains citation information about the publisher and the date.
