|
Last change
on this file since 52 was 52, checked in by imi, 18 years ago |
- fixed data merge (sometime set modified unnecessary)
- fixed rounding (now compare with epsilon instead of round everything)
- Fix: upload does not clear all changes if only some thing got uploaded
|
|
File size:
642 bytes
|
| Line | |
|---|
| 1 | package org.openstreetmap.josm.data.projection;
|
|---|
| 2 |
|
|---|
| 3 | import org.openstreetmap.josm.data.GeoPoint;
|
|---|
| 4 |
|
|---|
| 5 | /**
|
|---|
| 6 | * Implement Mercator Projection code, coded after documentation
|
|---|
| 7 | * from wikipedia.
|
|---|
| 8 | *
|
|---|
| 9 | * The center of the mercator projection is always the 0 grad
|
|---|
| 10 | * coordinate.
|
|---|
| 11 | *
|
|---|
| 12 | * @author imi
|
|---|
| 13 | */
|
|---|
| 14 | public class Mercator implements Projection {
|
|---|
| 15 |
|
|---|
| 16 | public void latlon2xy(GeoPoint p) {
|
|---|
| 17 | p.x = p.lon*Math.PI/180;
|
|---|
| 18 | p.y = Math.log(Math.tan(Math.PI/4+p.lat*Math.PI/360));
|
|---|
| 19 | }
|
|---|
| 20 |
|
|---|
| 21 | public void xy2latlon(GeoPoint p) {
|
|---|
| 22 | p.lon = p.x*180/Math.PI;
|
|---|
| 23 | p.lat = Math.atan(Math.sinh(p.y))*180/Math.PI;
|
|---|
| 24 | }
|
|---|
| 25 |
|
|---|
| 26 | @Override
|
|---|
| 27 | public String toString() {
|
|---|
| 28 | return "Mercator";
|
|---|
| 29 | }
|
|---|
| 30 | }
|
|---|
Note:
See
TracBrowser
for help on using the repository browser.
