/**
* Convert projection coordinates to a LatLonPoint Note: a new object is not created on each call
* for the return value.
*
* @param world convert from these projection coordinates
* @param result the object to write to
* @return LatLonPoint convert to these lat/lon coordinates
*/
public LatLonPoint projToLatLon(ProjectionPoint world, LatLonPointImpl result) {
double fromX = world.getX() - falseEasting;
double fromY = world.getY() - falseNorthing;
double toLon = Math.toDegrees(fromX / A) + lon0;
double e = Math.exp(-fromY / A);
double toLat = Math.toDegrees(Math.PI / 2 - 2 * Math.atan(e)); // Snyder p 44
result.setLatitude(toLat);
result.setLongitude(toLon);
return result;
}
ObservationUI(PointObsDatatype obs) {
this.obs = obs;
latlonPos.setLatitude(obs.getLocation().getLatitude());
latlonPos.setLongitude(obs.getLocation().getLongitude());
// text bb
Dimension t = textFont.getBoundingBox("O"); // LOOK temp
bb =
new Rectangle2D.Double(
-circleRadius, -circleRadius - t.getHeight(), t.getWidth(), t.getHeight());
// add circle bb
bb.add(circleBB);
}
/**
* Convert projection coordinates to a LatLonPoint Note: a new object is not created on each call
* for the return value.
*
* @param world convert from these projection coordinates
* @param result the object to write to
* @return LatLonPoint convert to these lat/lon coordinates
*/
public LatLonPoint projToLatLon(ProjectionPoint world, LatLonPointImpl result) {
double toLat, toLon;
double fromX = world.getX();
double fromY = world.getY();
double rho = Math.sqrt(fromX * fromX + fromY * fromY);
double c = Math.asin(rho / R);
toLon = lon0;
double temp = 0;
if (Math.abs(rho) > TOLERANCE) {
toLat = Math.asin(Math.cos(c) * sinLat0 + (fromY * Math.sin(c) * cosLat0 / rho));
if (Math.abs(lat0 - PI_OVER_4) > TOLERANCE) { // not 90 or -90
temp = rho * cosLat0 * Math.cos(c) - fromY * sinLat0 * Math.sin(c);
toLon = lon0 + Math.atan(fromX * Math.sin(c) / temp);
} else if (lat0 == PI_OVER_4) {
toLon = lon0 + Math.atan(fromX / -fromY);
temp = -fromY;
} else {
toLon = lon0 + Math.atan(fromX / fromY);
temp = fromY;
}
} else {
toLat = lat0;
}
toLat = Math.toDegrees(toLat);
toLon = Math.toDegrees(toLon);
if (temp < 0) {
toLon += 180;
}
toLon = LatLonPointImpl.lonNormal(toLon);
result.setLatitude(toLat);
result.setLongitude(toLon);
return result;
}
