Coordinates TCXParser::position()
{
Coordinates pos;
qreal val;
bool res;
while (_reader.readNextStartElement()) {
if (_reader.name() == "LatitudeDegrees") {
val = _reader.readElementText().toDouble(&res);
if (!res || (val < -90.0 || val > 90.0))
_reader.raiseError("Invalid LatitudeDegrees");
else
pos.setLat(val);
} else if (_reader.name() == "LongitudeDegrees") {
val = _reader.readElementText().toDouble(&res);
if (!res || (val < -180.0 || val > 180.0))
_reader.raiseError("Invalid LongitudeDegrees");
else
pos.setLon(val);
} else
_reader.skipCurrentElement();
}
return pos;
}
static QPointF tile2mercator(const QPoint &tile, int z)
{
Coordinates m;
m.setLon(tile.x() / pow(2.0, z) * 360.0 - 180);
qreal n = M_PI - 2.0 * M_PI * tile.y() / pow(2.0, z);
m.setLat(rad2deg(atan(0.5 * (exp(n) - exp(-n)))));
return m.toMercator();
}