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Alaska series E

  • Description
  • Projection method
  • Lines of contact
  • Linear graticules
  • Properties
  • Limitations
  • Uses and applications
  • Parameters

Description

This projection was developed in 1972 by the USGS to publish a map of Alaska at 1:2,500,000 scale.

Illustration of Alaska series E projection

Projection method

Approximates equidistant conic, although it is commonly referred to as a modified transverse Mercator

Learn more about the equidistant conic projection

Lines of contact

The standard parallels at 53°30' N and 66°05'24" N

Linear graticules

The meridians are straight lines radiating from a center point. The parallels closely approximate concentric circular arcs.

Properties

Shape

Neither conformal nor equal area

Area

Neither conformal nor equal area

Direction

Distortion increases with distance from the standard parallels.

Distance

Accurate along the standard parallels

Limitations

This projection is appropriate for mapping Alaska, the Aleutian Islands, and the Bering Sea region only.

Uses and applications

  • 1972 USGS revision of a 1954 Alaska map, published at 1:2,500,000 scale
  • 1974 map of the Aleutian Islands and the Bering Sea

Parameters

Supported in ArcInfo Workstation only. Projection-specific parameters are set by the software.

Related Topics

  • List of supported map projections
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