datum2_geog_centroid datum2_geom_centroid datum2_point_eq datum_geog_distance datum_geom_distance2d datum_geom_distance3d datum_point4d datum_point_eq datum_point_same datum_pt_distance2d datum_pt_distance3d ensure_has_M_geo ensure_has_not_M_geo ensure_has_not_Z_geo ensure_has_Z_geo ensure_mline_type ensure_not_empty ensure_not_geodetic ensure_not_geodetic_geo ensure_point_type ensure_same_dimensionality ensure_same_dimensionality_geo ensure_same_dimensionality_tspatial_geo ensure_same_geodetic ensure_same_geodetic_geo ensure_same_geodetic_stbox_geo ensure_same_geodetic_tspatial_base ensure_same_geodetic_tspatial_geo ensure_same_spatial_dimensionality ensure_same_spatial_dimensionality_stbox_geo ensure_same_srid ensure_spatial_validity ensure_srid_known ensure_tgeo_point_type ensure_tgeoinst_point_type ensure_tgeoseq_point_type ensure_tgeoseqset_point_type ensure_valid_spatial_stbox_stbox ensure_valid_stbox_geo ensure_valid_tgeo_geo ensure_valid_tgeo_stbox ensure_valid_tgeo_tgeo ensure_valid_tspatial_base ensure_valid_tspatial_geo ensure_valid_tspatial_tspatial geo_distance_fn geopoint_cmp geopoint_eq geopoint_make geopoint_same gserialized_flags mline_type pt_distance_fn same_dimensionality_tspatial_geo same_spatial_dimensionality spatial_flags tgeo_affine tgeo_centroid tgeo_convex_hull tgeo_scale tgeo_tpoint tgeo_traversed_area tgeogpoint_to_tgeography tgeography_to_tgeogpoint tgeography_to_tgeometry tgeoinst_affine tgeoinst_affine_iter tgeoinst_scale tgeoinst_scale_iter tgeoinst_tpointinst tgeom_tgeog tgeometry_to_tgeography tgeometry_to_tgeompoint tgeominst_tgeoginst tgeompoint_to_tgeometry tgeomseq_tgeogseq tgeomseqset_tgeogseqset tgeoseq_affine tgeoseq_scale tgeoseq_tpointseq tgeoseqset_affine tgeoseqset_scale tgeoseqset_tpointseqset

pt_distance_fn() datum_func2 pt_distance_fn ( int16  flags ) Select the appropriate distance function.