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Last change
on this file since 5072 was 4285, checked in by bastiK, 13 years ago |
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major projection rework
More modular structure, inspired by Proj.4.
There are almost no semantic changes to the projection algorithms. Mostly factors of 'a' and 180/PI have been moved from one place to the other. In UTM_France_DOM, the ellipsoid conversion for the first 3 projections has been changed from hayford <-> GRS80 to hayford <-> WGS84.
Some redundant algorithms have been removed. In particular:
- UTM_France_DOM used to have its own Transverse Mercator implementation. It is different from the implementation in TransverseMercator.java as it has another series expansion. For EPSG::2975, there are numeric differences on centimeter scale. However, the new data fits better with Proj.4 output.
- Also removed are alternate implementations of LambertConformalConic. (They are all quite similar, though.)
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-
Property svn:eol-style
set to
native
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File size:
914 bytes
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| 1 | // License: GPL. For details, see LICENSE file.
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| 2 | package org.openstreetmap.josm.data.projection.datum;
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| 3 |
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| 4 | import org.openstreetmap.josm.data.coor.LatLon;
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| 5 | import org.openstreetmap.josm.data.projection.Ellipsoid;
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| 6 |
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| 7 | /**
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| 8 | * Represents a geodetic datum.
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| 9 | *
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| 10 | * Basically it provides conversion functions from and to the WGS84 datum.
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| 11 | */
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| 12 | public interface Datum {
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| 13 |
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| 14 | /**
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| 15 | * @return a human readable name of this projection
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| 16 | */
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| 17 | String getName();
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| 18 |
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| 19 | /**
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| 20 | * @return the Proj.4 identifier
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| 21 | * (as reported by cs2cs -ld)
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| 22 | * If no id exists, return null.
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| 23 | */
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| 24 | String getProj4Id();
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| 25 |
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| 26 | /**
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| 27 | * @return the ellipsoid associated with this datum
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| 28 | */
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| 29 | Ellipsoid getEllipsoid();
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| 30 |
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| 31 | /**
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| 32 | * Convert lat/lon from this datum to WGS84 datum.
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| 33 | */
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| 34 | LatLon toWGS84(LatLon ll);
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| 35 |
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| 36 | /**
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| 37 | * Convert lat/lon from WGS84 to this datum.
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| 38 | */
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| 39 | LatLon fromWGS84(LatLon ll);
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| 40 |
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| 41 | }
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