Abstract:ABSTRACT There are about a dozen published variations of equidistant conic map projections. They are identical when using the same actual standard parallels, but the parallels are chosen differently. ...ABSTRACT There are about a dozen published variations of equidistant conic map projections. They are identical when using the same actual standard parallels, but the parallels are chosen differently. Greater use of the spheroidal form of the equidistant conic with two standard parallels (especially when chosen by minimum-error procedures) is encouraged because of its true meridian scale and low-error compromise between Lambert's conformal conic and Albers' conical equal-area projections. Scale errors and coordinates for the three major conic projections and for their spherical versus spheroidal forms are compared in representative tables for U.S. maps. Relative scale errors using projections based on the sphere rather than the spheroid may also be calculated with relatively simple formulas.Read More
Publication Year: 1978
Publication Date: 1978-09-01
Language: en
Type: article
Indexed In: ['crossref']
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Cited By Count: 27
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