public int longitudeToUnscaledX(double longitude) {
    double factor = (longitude - mWest) / mDistanceLongitude;
    return (int) (mPixelWidth * factor);
  }
Translate longitude coordinate to an x pixel value, without considering scale.

@param longitude The longitude.
@return The pixel value.
tileview/src/main/java/com/moagrius/tileview/plugins/CoordinatePlugin.java