American Practical Navigator by N. Bowditch

By N. Bowditch

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2. Correct angular relationship. A projection with this characteristic is conformal or orthomorphic. 3. Equal area, or the representation of areas in their correct relative proportions. 4. Constant scale values for measuring distances. 5. Great circles represented as straight lines. 6. Rhumb lines represented as straight lines. Some of these properties are mutually exclusive. For example, a single projection cannot be both conformal and equal area. Similarly, both great circles and rhumb lines cannot be represented on a single projection as straight lines.

For example, a single projection cannot be both conformal and equal area. Similarly, both great circles and rhumb lines cannot be represented on a single projection as straight lines. 303. Types Of Projections The type of developable surface to which the spherical surface is transferred determines the projection’s classification. Further classification depends on whether the projection is centered on the equator (equatorial), a pole (polar), or some point or line between (oblique). The name of a projection indicates its type and its principal features.

5. Great circles represented as straight lines. 6. Rhumb lines represented as straight lines. Some of these properties are mutually exclusive. For example, a single projection cannot be both conformal and equal area. Similarly, both great circles and rhumb lines cannot be represented on a single projection as straight lines. 303. Types Of Projections The type of developable surface to which the spherical surface is transferred determines the projection’s classification. Further classification depends on whether the projection is centered on the equator (equatorial), a pole (polar), or some point or line between (oblique).

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