Projection-based Coordinate Systems

• Map projection: Surface CS that is defined by a smooth 1-1 function that associates a subset of points on an oblate spheroid (or sphere) with a set of points (called the range of the projection) in R2

Note: this function is called the generating projection.

Note: Map projections generally do not convert the entire surface. Some regions of the surface and certain exceptional points such as the poles may not be converted. The range of the generating projection may be a proper subset of R2.

• Map projections used in the SRM include:

  • Mercator
  • Oblique Mercator
  • Transverse Mercator
  • Lambert Conformal Conic
  • Polar Stereographic
  • Equidistant Cylindrical

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