GEOG 361, C. Brewer  (PREVIOUS)

Map Projections

Continuing with azimuthal and conic examples
and evaluation of map distortion

Evaluating distortion

compare map graticule to globe graticule
look at shapes and areas of land masses and water bodies

equal area:
- areas of quadrilaterals
- increase in scale in one direction compensated by decrease in scale in opposite direction

conformal:
- right angles (not sufficient)
- scale change in one direction accompanied by equal scale change in opposite direction


Azimuthal (each 1:300M)
Zero and 180 longitude lines and equator are darker/wider in examples

Stereographic Conformal

Azimuthal Equal Area Equal Area

Orthographic

Oblique orthographic

Azimuthal suitable for compact area at standard point or line


Conic (each 1:300M)

AlbersAlbers Equal Area Conic

Albers Australia

conformal conic Conformal

Conic suitable for mid-latitude areas with east-west extent

Cylindrical suitable for areas near equator or with north-south extent
 (Examples on PREVIOUS page)

(NEXT)