“Magnifying-Glass” Azimuthal Map Projections
American Cartographer
By: John P. Snyder
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Abstract
For maps focusing on a region of interest, but including surrounding areas to provide a setting, new azimuthal projections have been developed with a 'magnifying-glass' effect. On two such projections, inside a circle bounding the region of interest is a standard Azimuthal Equidistant or Lambert Azimuthal Equal-Area projection. Between this circle and an outer bounding circle azimuths remain true and the radial or area scale, respectively, remains constant, but at a reduced value. On four other projections, the inner portion is a standard azimuthal projection, which may be Stereographic, Gnomonic, or the above, but beyond this portion, the radial scale is gradually reduced to zero. Equivalents with rectangular boundaries are also available.
Suggested Citation
Snyder, J., 1987, “Magnifying-Glass” Azimuthal Map Projections: American Cartographer, v. 14, no. 1, p. 61-68, https://doi.org/10.1559/152304087783875318.
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | “Magnifying-Glass” Azimuthal Map Projections |
| Series title | American Cartographer |
| DOI | 10.1559/152304087783875318 |
| Volume | 14 |
| Issue | 1 |
| Publication Date | March 14, 2013 |
| Year Published | 1987 |
| Language | English |
| Publisher | Ingenta Connect |
| Larger Work Type | Article |
| Larger Work Subtype | Journal Article |
| Larger Work Title | American Cartographer |
| First page | 61 |
| Last page | 68 |