alpha bearing_point_point bearing_tpoint_point bearing_tpoint_tpoint closest_point2d_on_segment_ratio closest_point3dz_on_segment_ratio closest_point_on_segment_sphere datum2_point_eq datum2_point_ne datum_point2d datum_point2d_p datum_point3dz datum_point3dz_p datum_point4d datum_point_eq distance_fn ensure_has_M_gs ensure_has_not_M_gs ensure_has_not_Z ensure_has_not_Z_gs ensure_has_Z ensure_has_Z_gs ensure_non_empty ensure_not_geodetic ensure_point_type ensure_same_dimensionality ensure_same_dimensionality_gs ensure_same_dimensionality_tpoint_gs ensure_same_geodetic ensure_same_spatial_dimensionality ensure_same_spatial_dimensionality_stbox_gs ensure_same_spatial_dimensionality_temp_box ensure_same_srid ensure_same_srid_stbox ensure_same_srid_stbox_gs ensure_same_srid_tpoint_stbox ensure_spatial_validity FLAGS_GET_EXTFLAGS FLAGS_GET_VERSBIT2 geo_serialize geog_azimuth geog_bearing geog_distance geom_azimuth geom_bearing geom_distance2d geom_distance3d geom_intersection2d geopoint_collinear geosegm_interpolate_point geosegm_locate_point get_bearing_fn GS_POINT_PTR gserialized_point2d_p gserialized_point3dz_p gsinter_get_points gspoint_make interpolate_point4d_sphere lw_seg_interact LWFLAG_EXTFLAGS LWFLAG_VERSBIT2 lwline_make lwpoint_cmp lwpoint_sort_cmp lwpointarr_make_trajectory lwpointarr_remove_duplicates lwpointarr_sort MOBDB_SEG_INTER_TYPE parseg2d_intersection point2D_add_z point2D_assemble point2d_on_segment point3dz_on_segment point_get_x point_get_y point_get_z point_on_segment point_on_segment_sphere pt_distance2d pt_distance3d pt_distance_fn seg2d_intersection tgeogpoint_always_eq tgeogpoint_ever_eq tgeogpointsegm_intersection tgeompoint_always_eq tgeompoint_ever_eq tgeompoint_tgeogpoint tgeompointinst_tgeogpointinst tgeompointsegm_intersection tgeompointseq_tgeogpointseq tgeompointseqset_tgeogpointseqset tpoint_add_z tpoint_always_eq tpoint_assemble_coords_xy tpoint_at_geometry tpoint_at_stbox tpoint_at_stbox1 tpoint_azimuth tpoint_cumulative_length tpoint_ever_eq tpoint_geo_min_bearing_at_timestamp tpoint_get_coord tpoint_is_simple tpoint_length tpoint_make_simple tpoint_minus_geometry tpoint_minus_stbox tpoint_minus_stbox1 tpoint_restrict_geometry tpoint_restrict_stbox tpoint_set_srid tpoint_speed tpoint_srid tpoint_trajectory tpoint_twcentroid tpointcontseq_split tpointcontseq_trajectory tpointdiscseq_restrict_geometry tpointdiscseq_split tpointdiscseq_trajectory tpointinst_always_eq tpointinst_ever_eq tpointinst_restrict_geometry tpointinst_set_srid tpointinst_srid tpointsegm_intersection_value tpointsegm_min_bearing_at_timestamp tpointsegm_timestamp_at_value1 tpointseq_always_eq tpointseq_at_geometry tpointseq_azimuth tpointseq_azimuth1 tpointseq_cumulative_length tpointseq_discstep_find_splits tpointseq_discstep_is_simple tpointseq_ever_eq tpointseq_interperiods tpointseq_is_simple tpointseq_length tpointseq_length_2d tpointseq_length_3d tpointseq_linear_at_geometry tpointseq_linear_find_splits tpointseq_make_simple tpointseq_minus_geometry tpointseq_restrict_geometry tpointseq_set_srid tpointseq_speed tpointseq_srid tpointseq_step_at_geometry tpointseq_timestamp_at_value tpointseq_twcentroid tpointseq_twcentroid1 tpointseqset_always_eq tpointseqset_azimuth tpointseqset_cumulative_length tpointseqset_ever_eq tpointseqset_is_simple tpointseqset_length tpointseqset_make_simple tpointseqset_restrict_geometry tpointseqset_set_srid tpointseqset_speed tpointseqset_srid tpointseqset_trajectory tpointseqset_twcentroid

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