/*
* WARNING, All test cases exist in osmdroid-android-it/src/main/java (maven project)
*
* During build time (with gradle), these tests are copied from osmdroid-android-it to OpenStreetMapViewer/src/androidTest/java
* DO NOT Modify files in OpenSteetMapViewer/src/androidTest. You will loose your changes when building!
*
*/
package org.osmdroid;
import org.osmdroid.util.GeoPoint;
import android.graphics.Point;
import android.test.AndroidTestCase;
import android.test.suitebuilder.annotation.Suppress;
import microsoft.mappoint.TileSystem;
/**
* @author Marc Kurtz
* @author Neil Boyd
*
*/
public class TileSystemMathTest extends AndroidTestCase {
@Suppress // this test is here to test timings for issue 512
public void test_divide() {
long start = System.currentTimeMillis();
double delta = 0.0;
for (int i=0; i<10000000; i++){
delta = i/1E6;
}
long diff = System.currentTimeMillis() - start;
assertEquals("fail", 0, diff);
}
@Suppress // this test is here to test timings for issue 512
public void test_multiply() {
long start = System.currentTimeMillis();
double delta = 0.0;
for (int i=0; i<10000000; i++){
delta = i*1E-6;
}
long diff = System.currentTimeMillis() - start;
assertEquals("fail", 0, diff);
}
/**
* lat,long = 60.0, 60.0 <br>
* gdaltransform -s_srs WGS84 -t_srs EPSG:900913 = 6679169.44759642 8399737.88981836<br>
* MetersToPixels(6679169.44759642, 8399737.88981836, 10) = 174763, 76127 <br>
*/
public void test_LatLongToPixelXY() {
final double latitude = 60.0d;
final double longitude = 60.0d;
final int levelOfDetail = 10;
final Point point = TileSystem.LatLongToPixelXY(latitude, longitude, levelOfDetail, null);
assertEquals("TODO describe test", 174763, point.x);
assertEquals("TODO describe test", 76127, point.y);
}
/**
* PixelsToMeters(45, 45, 8) = -2.000999101260658E7, 2.000999101260658E7 <br>
* gdaltransform -s_srs EPSG:900913 -t_srs WGS84 = -179.752807617187 85.0297584051224 <br>
*/
public void test_PixelXYToLatLong() {
final int pixelX = 45;
final int pixelY = 45;
final int levelOfDetail = 8;
final double delta = 1E-3;
final GeoPoint point = TileSystem.PixelXYToLatLong(pixelX, pixelY, levelOfDetail, null);
assertEquals("TODO describe test", -179.752807617187, point.getLongitudeE6() / 1E6, delta);
assertEquals("TODO describe test", 85.0297584051224, point.getLatitudeE6() / 1E6, delta);
assertEquals("TODO describe test", -179.752807617187, point.getLongitude(), delta);
assertEquals("TODO describe test", 85.0297584051224, point.getLatitude(), delta);
}
/**
* Reference values from: http://msdn.microsoft.com/en-us/library/bb259689.aspx
*/
public void test_MapSize() {
assertEquals(512, TileSystem.MapSize(1));
assertEquals(1024, TileSystem.MapSize(2));
assertEquals(2048, TileSystem.MapSize(3));
assertEquals(4096, TileSystem.MapSize(4));
assertEquals(8192, TileSystem.MapSize(5));
assertEquals(16384, TileSystem.MapSize(6));
assertEquals(32768, TileSystem.MapSize(7));
assertEquals(65536, TileSystem.MapSize(8));
assertEquals(131072, TileSystem.MapSize(9));
assertEquals(262144, TileSystem.MapSize(10));
assertEquals(524288, TileSystem.MapSize(11));
assertEquals(1048576, TileSystem.MapSize(12));
assertEquals(2097152, TileSystem.MapSize(13));
assertEquals(4194304, TileSystem.MapSize(14));
assertEquals(8388608, TileSystem.MapSize(15));
assertEquals(16777216, TileSystem.MapSize(16));
assertEquals(33554432, TileSystem.MapSize(17));
assertEquals(67108864, TileSystem.MapSize(18));
assertEquals(134217728, TileSystem.MapSize(19));
assertEquals(268435456, TileSystem.MapSize(20));
assertEquals(536870912, TileSystem.MapSize(21));
assertEquals(1073741824, TileSystem.MapSize(22));
assertEquals(1073741824, TileSystem.MapSize(23));
}
/**
* Reference values from: http://msdn.microsoft.com/en-us/library/bb259689.aspx
*/
public void test_groundResolution() {
final double delta = 1e-4;
assertEquals(78271.5170, TileSystem.GroundResolution(0, 1), delta);
assertEquals(39135.7585, TileSystem.GroundResolution(0, 2), delta);
assertEquals(19567.8792, TileSystem.GroundResolution(0, 3), delta);
assertEquals(9783.9396, TileSystem.GroundResolution(0, 4), delta);
assertEquals(4891.9698, TileSystem.GroundResolution(0, 5), delta);
assertEquals(2445.9849, TileSystem.GroundResolution(0, 6), delta);
assertEquals(1222.9925, TileSystem.GroundResolution(0, 7), delta);
assertEquals(611.4962, TileSystem.GroundResolution(0, 8), delta);
assertEquals(305.7481, TileSystem.GroundResolution(0, 9), delta);
assertEquals(152.8741, TileSystem.GroundResolution(0, 10), delta);
assertEquals(76.4370, TileSystem.GroundResolution(0, 11), delta);
assertEquals(38.2185, TileSystem.GroundResolution(0, 12), delta);
assertEquals(19.1093, TileSystem.GroundResolution(0, 13), delta);
assertEquals(9.5546, TileSystem.GroundResolution(0, 14), delta);
assertEquals(4.7773, TileSystem.GroundResolution(0, 15), delta);
assertEquals(2.3887, TileSystem.GroundResolution(0, 16), delta);
assertEquals(1.1943, TileSystem.GroundResolution(0, 17), delta);
assertEquals(0.5972, TileSystem.GroundResolution(0, 18), delta);
assertEquals(0.2986, TileSystem.GroundResolution(0, 19), delta);
assertEquals(0.1493, TileSystem.GroundResolution(0, 20), delta);
assertEquals(0.0746, TileSystem.GroundResolution(0, 21), delta);
assertEquals(0.0373, TileSystem.GroundResolution(0, 22), delta);
assertEquals(0.0373, TileSystem.GroundResolution(0, 23), delta);
}
/**
* Reference values from: http://msdn.microsoft.com/en-us/library/bb259689.aspx
*/
public void test_groundMapScale() {
final double delta = 1e-2;
assertEquals(295829355.45, TileSystem.MapScale(0, 1, 96), delta);
assertEquals(147914677.73, TileSystem.MapScale(0, 2, 96), delta);
assertEquals(73957338.86, TileSystem.MapScale(0, 3, 96), delta);
assertEquals(36978669.43, TileSystem.MapScale(0, 4, 96), delta);
assertEquals(18489334.72, TileSystem.MapScale(0, 5, 96), delta);
assertEquals(9244667.36, TileSystem.MapScale(0, 6, 96), delta);
assertEquals(4622333.68, TileSystem.MapScale(0, 7, 96), delta);
assertEquals(2311166.84, TileSystem.MapScale(0, 8, 96), delta);
assertEquals(1155583.42, TileSystem.MapScale(0, 9, 96), delta);
assertEquals(577791.71, TileSystem.MapScale(0, 10, 96), delta);
assertEquals(288895.85, TileSystem.MapScale(0, 11, 96), delta);
assertEquals(144447.93, TileSystem.MapScale(0, 12, 96), delta);
assertEquals(72223.96, TileSystem.MapScale(0, 13, 96), delta);
assertEquals(36111.98, TileSystem.MapScale(0, 14, 96), delta);
assertEquals(18055.99, TileSystem.MapScale(0, 15, 96), delta);
assertEquals(9028.00, TileSystem.MapScale(0, 16, 96), delta);
assertEquals(4514.00, TileSystem.MapScale(0, 17, 96), delta);
assertEquals(2257.00, TileSystem.MapScale(0, 18, 96), delta);
assertEquals(1128.50, TileSystem.MapScale(0, 19, 96), delta);
assertEquals(564.25, TileSystem.MapScale(0, 20, 96), delta);
assertEquals(282.12, TileSystem.MapScale(0, 21, 96), delta);
assertEquals(141.06, TileSystem.MapScale(0, 22, 96), delta);
assertEquals(141.06, TileSystem.MapScale(0, 23, 96), delta);
}
/**
* Converts EPSG:900913 to pyramid pixel coordinates in given zoom level. Using google tile
* referencing where the origin [0,0] is the top-left corner.
*/
public Point MetersToPixels(final double mx, final double my, final int zoom) {
final double res = TileSystem.GroundResolution(0, zoom);
final double originShift = 2 * Math.PI * 6378137 / 2.0;
final int px = (int) Math.round((mx + originShift) / res);
int py = (int) Math.round((my + originShift) / res);
// This converts from TMS to Google tiles by flipping the Y-axis
py = TileSystem.MapSize(zoom) - py;
return new Point(px, py);
}
/**
* Converts pixel coordinates in given zoom level of pyramid to EPSG:900913. Using google tile
* referencing where the origin [0,0] is the top-left corner.
*/
public double[] PixelsToMeters(final double px, final double py, final int zoom) {
final double res = TileSystem.GroundResolution(0, zoom);
final double originShift = 2 * Math.PI * 6378137 / 2.0;
final double mx = px * res - originShift;
double my = py * res - originShift;
// This converts from TMS to Google tiles by flipping the Y-axis
my = -my;
return new double[] { mx, my };
}
}