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Employment of Projections
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American Cartographer American Geographers Annals Association areal symbols array Association of American base map boundaries cartog cartogram cartographic design Cartographic Journal Census Chapter choropleth map chroma circle Class Intervals classification color contrast data points density developed distortion distribution dot mapping earth elements enumeration units equal-area error example figure and ground film flow lines flow maps Geological Survey graphic gray grid important International isarithmic map isolines Isopleth Isopleth Mapping legend lettering letterspacing levels of measurement linear map design Map Projections map reader map's masking film ment meridians method National Ocean Service objects pattern perception plane plot point symbol population population density printing production ratio reference ellipsoid represent result Robinson screen selection serif shape Source space spatial square standard Statistical surface Table technical pens technique thematic map tion typeface USGPO value-by-area variable visual Visual Perception York