Lecture04

Lecture04 - The graticule shows increments of latitude and...

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1 Geography 12: Maps and Spatial Reasoning Lecture 4: Some Useful Map Projections Professor Keith Clarke The graticule shows increments of latitude and longitude No flat map can be both equivalent and conformal Area Burn Onto Your Brain Cells Burn Onto Your Brain Cells •No flat map can be both No flat map can be both equivalent and conformal equivalent and conformal •We always distort scale, We always distort scale, direction or shape direction or shape •We ignore projections at our We ignore projections at our peril! peril!
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2 We’ve already covered… • Form (planar, cylindrical, conic) • Aspect (equatorial, oblique, transverse) • Property preservation (shape, area, direction) • Analog vs. mathematical • Tangent vs. secant The central meridian • In the mathematical derivation, x can map onto any meridian, by default we get 0 o • x’ = f ( l - l 0 ) • We can change the center of the map • Can even change the direction of the axis Changing the central meridian Mollweide: An equal area pseudocylindrical projection x and y are not independent x y
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This note was uploaded on 12/27/2011 for the course GEOG 12 taught by Professor Gautier during the Fall '08 term at UCSB.

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Lecture04 - The graticule shows increments of latitude and...

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