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The modified polyconic projection for the IMW.

Cartographica

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Abstract

The modified polyconic map projection designed by Lallemand and adopted for the International Map of the World between 1909 and 1962 has two meridians and two parallels which are true to scale. Constructed geometrically in the past, forward and inverse coordinate transformations may be calculated analytically in order to transfer data from existing quadrangles to other maps. The equations for these transformations are derived and used to calculate representative tables of coordinates and scale factors. Although the projection is neither equal-area nor conformal, scale does not vary more than 0.06% throughout the quadrangle.-Author

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
The modified polyconic projection for the IMW.
Series title:
Cartographica
Volume
19
Issue:
3-4
Year Published:
1982
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
First page:
31
Last page:
43
Number of Pages:
13