Alaska Conformal

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Use of this projection results in a conformal map of Alaska. It has little scale distortion as compared to other conformal projections. The method of projection is "modified planar. [It is] a sixth-order-equation modification of an oblique Stereographic conformal projection on the Clarke 1866 spheroid. The origin is at 64° N, 152° W" (Environmental Systems Research Institute, 1997).

Construction

Modified planar

Property

Conformal

Meridians

N/A

Parallels

N/A

Graticule spacing

N/A

Linear scale

The minimum scale factor is 0.997 at roughly 62.5° N, 156° W. Scale increases outward from these coordinates. Most of Alaska and the Aleutian Islands (with the exception of the panhandle) is bounded by a line of true scale. The scale factor for Alaska is from 0.997 to 1.003. That is one quarter the range for a corresponding conic projection (Snyder, 1987).

Uses

Mapping the complete state of Alaska on the Clarke 1866 spheroid or NAD27, but not with other datums and spheroids. Distortion increases as distance from Alaska increases.

Source: Environmental Systems Research Institute, 1997