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Last change
on this file since 5040 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:
716 bytes
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| 1 | // License: GPL. For details, see LICENSE file.
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| 2 | package org.openstreetmap.josm.data.projection.proj;
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| 3 |
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| 4 | import static java.lang.Math.*;
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| 5 |
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| 6 | import static org.openstreetmap.josm.tools.I18n.tr;
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| 7 |
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| 8 | /**
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| 9 | * Mercator Projection.
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| 10 | */
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| 11 | public class Mercator implements Proj {
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| 12 |
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| 13 | @Override
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| 14 | public String getName() {
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| 15 | return tr("Mercator");
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| 16 | }
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| 17 |
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| 18 | @Override
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| 19 | public String getProj4Id() {
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| 20 | return "merc";
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| 21 | }
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| 22 |
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| 23 | @Override
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| 24 | public double[] project(double lat_rad, double lon_rad) {
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| 25 | return new double[] { lon_rad, log(tan(PI/4 + lat_rad/2)) };
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| 26 | }
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| 27 |
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| 28 | @Override
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| 29 | public double[] invproject(double east, double north) {
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| 30 | return new double[] { atan(sinh(north)), east };
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| 31 | }
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| 32 |
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| 33 | }
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