“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.
| 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 |
| 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 |
| Google Analytic Metrics | Metrics page |