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| Distribution |
Debian testing |
| Abteilung |
perl |
| Quelle |
libgeo-helmerttransform-perl |
| Version |
1.13-2 |
| Maintainer |
Dominic Hargreaves <dom@earth.li>
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| Beschreibung |
It is usual to describe geographical points in terms of their polar coordinates
(latitude, longitude and altitude) referenced to a "datum ellipsoid", which is
used to approximate the Earth's geoid. The latitude, longitude and altitude of
a given physical point vary depending on which datum ellipsoid is in use.
Unfortunately, a number of ellipsoids are in everyday use, and so it is often
necessary to transform geographical coordinates between different datum
ellipsoids.
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Two different datum ellipsoids may differ in the locations of their centers, or
in their shape; and there may be an angle between their equatorial planes or
the meridians relative to which longitude is measured. The Helmert Transform,
which this module implements, is a linear transformation of coordinates between
pairs of datum ellipsoids in the limit of small angles of deviation between
them.
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| Abhängig von | perl |
| Offizielle Seiten |
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