Last change
on this file since 116 was 116, checked in by imi, 18 years ago |
- added color for scale bar
- fixed scale bar in EPSG:4236 projection
- added annotation preset system
|
File size:
894 bytes
|
Line | |
---|
1 | package org.openstreetmap.josm.data.projection;
|
---|
2 |
|
---|
3 | import org.openstreetmap.josm.data.coor.EastNorth;
|
---|
4 | import org.openstreetmap.josm.data.coor.LatLon;
|
---|
5 |
|
---|
6 | /**
|
---|
7 | * Implement Mercator Projection code, coded after documentation
|
---|
8 | * from wikipedia.
|
---|
9 | *
|
---|
10 | * The center of the mercator projection is always the 0 grad
|
---|
11 | * coordinate.
|
---|
12 | *
|
---|
13 | * @author imi
|
---|
14 | */
|
---|
15 | public class Mercator implements Projection {
|
---|
16 |
|
---|
17 | public EastNorth latlon2eastNorth(LatLon p) {
|
---|
18 | return new EastNorth(
|
---|
19 | p.lon()*Math.PI/180,
|
---|
20 | Math.log(Math.tan(Math.PI/4+p.lat()*Math.PI/360)));
|
---|
21 | }
|
---|
22 |
|
---|
23 | public LatLon eastNorth2latlon(EastNorth p) {
|
---|
24 | return new LatLon(
|
---|
25 | Math.atan(Math.sinh(p.north()))*180/Math.PI,
|
---|
26 | p.east()*180/Math.PI);
|
---|
27 | }
|
---|
28 |
|
---|
29 | @Override public String toString() {
|
---|
30 | return "Mercator";
|
---|
31 | }
|
---|
32 |
|
---|
33 | public String getCacheDirectoryName() {
|
---|
34 | return "mercator";
|
---|
35 | }
|
---|
36 |
|
---|
37 | public double scaleFactor() {
|
---|
38 | return 1/Math.PI/2;
|
---|
39 | }
|
---|
40 | }
|
---|
Note:
See
TracBrowser
for help on using the repository browser.