PostGIS  3.1.6dev-r@@SVN_REVISION@@

◆ lwgeom_reduceprecision()

LWGEOM* lwgeom_reduceprecision ( const LWGEOM geom,
double  gridSize 
)

Definition at line 943 of file liblwgeom/lwgeom_geos.c.

944 {
945 #if POSTGIS_GEOS_VERSION < 39
946  lwerror("Precision reduction requires GEOS-3.9 or higher");
947  return NULL;
948 #else
949 
950  LWGEOM* result;
951  int32_t srid = RESULT_SRID(geom);
952  uint8_t is3d = FLAGS_GET_Z(geom->flags);
953  GEOSGeometry *g1, *g3;
954 
955  if (srid == SRID_INVALID) return NULL;
956 
957  if (lwgeom_is_empty(geom))
958  return lwgeom_clone_deep(geom);
959 
960  initGEOS(lwnotice, lwgeom_geos_error);
961 
962  if (!(g1 = LWGEOM2GEOS(geom, AUTOFIX))) GEOS_FAIL();
963 
964  g3 = GEOSGeom_setPrecision(g1, gridSize, 0);
965 
966  if (!g3) GEOS_FREE_AND_FAIL(g1);
967  GEOSSetSRID(g3, srid);
968 
969  if (!(result = GEOS2LWGEOM(g3, is3d)))
970  GEOS_FREE_AND_FAIL(g1);
971 
972  GEOS_FREE(g1, g3);
973 
974  return result;
975 #endif
976 }
char result[OUT_DOUBLE_BUFFER_SIZE]
Definition: cu_print.c:267
#define GEOS_FREE(...)
#define AUTOFIX
#define RESULT_SRID(...)
#define GEOS_FAIL()
#define GEOS_FREE_AND_FAIL(...)
GEOSGeometry * LWGEOM2GEOS(const LWGEOM *lwgeom, uint8_t autofix)
LWGEOM * GEOS2LWGEOM(const GEOSGeometry *geom, uint8_t want3d)
void lwgeom_geos_error(const char *fmt,...)
#define SRID_INVALID
Definition: liblwgeom.h:233
LWGEOM * lwgeom_clone_deep(const LWGEOM *lwgeom)
Deep clone an LWGEOM, everything is copied.
Definition: lwgeom.c:512
#define FLAGS_GET_Z(flags)
Definition: liblwgeom.h:179
void lwerror(const char *fmt,...)
Write a notice out to the error handler.
Definition: lwutil.c:190
void lwnotice(const char *fmt,...)
Write a notice out to the notice handler.
Definition: lwutil.c:177
static int lwgeom_is_empty(const LWGEOM *geom)
Return true or false depending on whether a geometry is an "empty" geometry (no vertices members)
Definition: lwinline.h:203
lwflags_t flags
Definition: liblwgeom.h:475

References AUTOFIX, LWGEOM::flags, FLAGS_GET_Z, GEOS2LWGEOM(), GEOS_FAIL, GEOS_FREE, GEOS_FREE_AND_FAIL, lwerror(), LWGEOM2GEOS(), lwgeom_clone_deep(), lwgeom_geos_error(), lwgeom_is_empty(), lwnotice(), result, RESULT_SRID, and SRID_INVALID.

Referenced by ST_ReducePrecision().

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