Compiled By: Rauf Tabassum
•A method by which the
curved 3D surface of the earth is represented on a flat 2D map surface.
•a two dimensional representation, using a plane coordinate system,
of the earth’s three dimensional sphere/spheroid
•location on the 3D
earth is measured by latitude and longitude;
•location on the 2D
map is measured by x,y Cartesian coordinates
•unlike choice of
spheroid, choice of map projection does not change a location’s lat/long coords, only its XY coords.
•Geoid and Spheroids: modeling
the earth
•Latitude and
Longitude: position
on the model
•Datums and Surveying: measuring
the model
•Map Projections: converting
the model to 2 dimensions
•Scale: sizing the model
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