abes awgs bbes BesselBLToGaussKrueger BLRauenberg bwgs cbes dx dy dz eqbes eqwgs geometry_transform_gk Geometry_transform_gk gk h1 HelmertTransformation MDC newF Pi point2d_get_datum rotx roty rotz sc tgeompoint_transform_gk Tgeompoint_transform_gk

bwgs double bwgs = 6356752.314