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Lecture08 - The map as a model Geography 12 Maps and...

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1 Geography 12: Maps and Spatial Reasoning Lecture 8: Cartometry: Position and distance Professor Keith Clarke The map as a model If the map model is geometrically faithful to the real world and accurate, then the map can serve as a model of the real world We can make measurements, navigation decisions, and analyze or interpret the landscape from maps, and assume the same conclusions apply to the real world. Vs. Cartometry Making measurements from maps Measurements link to reality through map scale What can we measure? The “Feature” model of maps The world contains: – Point features – Line features – Area features So the map contains: – Point symbols – Line symbols – Area symbols – Labels
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2 Nowhere, OK 550800mE 3890837mN 14S Points, Lines, Areas, Text The map legend In the feature model, the legend is the key or index that allows us to interpret symbols as features So common, the ESRI map fonts are included in Word Processors The USGS topographic map symbols POINT features e.g. Buildings
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