question: public Point2D forward ( double lat , double lon , Point2D p , boolean isRadian ) { if ( isRadian ) { lat = Math . toDegrees ( normalizeLatitude ( lat ) ) ; lon = Math . toDegrees ( ProjMath . wrapLongitude ( lon - cLonRad ) ) ; } else { lat = normalizeLatitudeDeg ( lat ) ; lon = wrapLongitudeDeg ( lon - cLon ) ; } double x = wx + ( lon * ppd ) ; double y = hy - ( ( lat - cLat ) * ppd ) ; p . setLocation ( x , y ) ; return p ; }
target:  Forward projects lat,lon into XY space and returns a Point2D.