circ_tree_distance_tree_internal distance_tgeo_geo distance_tgeo_tgeo geography_shortestline_internal lw_distance_fraction nad_stbox_geo nad_stbox_stbox nad_tgeo_geo nad_tgeo_stbox nad_tgeo_tgeo nai_tgeo_geo nai_tgeo_tgeo nai_tgeoseq_discstep_geo nai_tgeoseq_discstep_geo_iter nai_tgeoseqset_step_geo nai_tpointsegm_linear_geo1 nai_tpointseq_linear_geo nai_tpointseq_linear_geo_iter nai_tpointseqset_linear_geo point2d_min_dist point3d_min_dist shortestline_tgeo_geo shortestline_tgeo_tgeo tgeogpointsegm_distance_turnpt tgeompointsegm_distance_turnpt tpoint_geo_distance_turnpt tpointsegm_distance_turnpt

lw_distance_fraction() static double lw_distance_fraction ( const LWGEOM *  geom1, const LWGEOM *  geom2, int  mode, double *  fraction  ) static Return the distance between two geometries. When the first geometry is a segment it also computes a value between 0 and 1 that represents the location in the segment of the closest point to the second geometry, as a fraction of total segment length. Note Function inspired by PostGIS function lw_dist2d_distancepoint from measures.c