Loading...
Searching...
No Matches
◆ ST_LocateAlong()
| Datum ST_LocateAlong | ( | PG_FUNCTION_ARGS | ) |
Definition at line 82 of file lwgeom_functions_lrs.c.
83{
84 GSERIALIZED *gin = PG_GETARG_GSERIALIZED_P(0);
85 GSERIALIZED *gout;
86 LWGEOM *lwin = NULL, *lwout = NULL;
87 double measure = PG_GETARG_FLOAT8(1);
88 double offset = PG_GETARG_FLOAT8(2);
89
90 lwin = lwgeom_from_gserialized(gin);
91 lwout = lwgeom_locate_along(lwin, measure, offset);
92 lwgeom_free(lwin);
93 PG_FREE_IF_COPY(gin, 0);
94
95 if ( ! lwout )
96 PG_RETURN_NULL();
97
98 gout = geometry_serialize(lwout);
99 lwgeom_free(lwout);
100
101 PG_RETURN_POINTER(gout);
102}
LWGEOM * lwgeom_from_gserialized(const GSERIALIZED *g)
Allocate a new LWGEOM from a GSERIALIZED.
Definition gserialized.c:268
LWGEOM * lwgeom_locate_along(const LWGEOM *lwin, double m, double offset)
Determine the location(s) along a measured line where m occurs and return as a multipoint.
Definition lwlinearreferencing.c:219
Definition liblwgeom.h:443
Definition liblwgeom.h:457
References lwgeom_free(), lwgeom_from_gserialized(), and lwgeom_locate_along().
Referenced by ST_LocateBetween().
Here is the call graph for this function:
Here is the caller graph for this function:
