question: @ SuppressWarnings ( "unchecked" ) public < T extends Point2D > T inverse ( double x , double y , T ret_val ) { if ( ret_val == null ) { ret_val = ( T ) new LatLonPoint . Double ( ) ; } double px = x + ul . x ; double py = - y + ul . y + oy ; if ( px > ProjMath . roundAdjust ( world . x / 2.0 ) ) { px = ProjMath . roundAdjust ( world . x / 2.0 ) ; } else if ( px < ProjMath . roundAdjust ( - world . x / 2.0 ) ) { px = ProjMath . roundAdjust ( - world . x / 2.0 ) ; } if ( py > ProjMath . roundAdjust ( world . y / 2.0 ) ) { py = ProjMath . roundAdjust ( world . y / 2.0 ) ; } else if ( py < ProjMath . roundAdjust ( - world . y / 2.0 ) ) { py = ProjMath . roundAdjust ( - world . y / 2.0 ) ; } double lat_ = normalizeLatitude ( py / spps_y ) ; double lon_ = wrapLongitude ( ( px / spps_x ) + centerX ) ; ret_val . setLocation ( Math . toDegrees ( lon_ ) , Math . toDegrees ( lat_ ) ) ; return ret_val ; }
target:  Inverse project x,y coordinates into a LatLonPoint. <p>