PostGIS  2.2.8dev-r@@SVN_REVISION@@

◆ parse_gml_point()

static LWGEOM* parse_gml_point ( xmlNodePtr  xnode,
bool *  hasz,
int *  root_srid 
)
static

Parse GML point (2.1.2, 3.1.1)

Definition at line 910 of file lwgeom_in_gml.c.

References get_xlink_node(), gml_lwpgerror(), gml_reproject_pa(), is_xlink(), lwpoint_as_lwgeom(), lwpoint_construct(), lwpoint_construct_empty(), POINTARRAY::npoints, parse_gml_data(), parse_gml_srs(), ptarray_flip_coordinates(), struct_gmlSrs::reverse_axis, struct_gmlSrs::srid, and SRID_UNKNOWN.

Referenced by parse_gml().

911 {
912  gmlSrs srs;
913  LWGEOM *geom;
914  POINTARRAY *pa;
915 
916  if (is_xlink(xnode)) xnode = get_xlink_node(xnode);
917 
918  if (xnode->children == NULL)
919  return lwpoint_as_lwgeom(lwpoint_construct_empty(*root_srid, 0, 0));
920 
921  pa = parse_gml_data(xnode->children, hasz, root_srid);
922  if (pa->npoints != 1) gml_lwpgerror("invalid GML representation", 34);
923 
924  parse_gml_srs(xnode, &srs);
925  if (srs.reverse_axis) pa = ptarray_flip_coordinates(pa);
926  if (!*root_srid)
927  {
928  *root_srid = srs.srid;
929  geom = (LWGEOM *) lwpoint_construct(*root_srid, NULL, pa);
930  }
931  else
932  {
933  if (srs.srid != *root_srid)
934  gml_reproject_pa(pa, srs.srid, *root_srid);
935  geom = (LWGEOM *) lwpoint_construct(SRID_UNKNOWN, NULL, pa);
936  }
937 
938  return geom;
939 }
int npoints
Definition: liblwgeom.h:355
static void gml_lwpgerror(char *msg, int error_code)
Definition: lwgeom_in_gml.c:67
static void parse_gml_srs(xmlNodePtr xnode, gmlSrs *srs)
Parse gml srsName attribute.
LWPOINT * lwpoint_construct_empty(int srid, char hasz, char hasm)
Definition: lwpoint.c:120
static POINTARRAY * gml_reproject_pa(POINTARRAY *pa, int srid_in, int srid_out)
Use Proj4 to reproject a given POINTARRAY.
POINTARRAY * ptarray_flip_coordinates(POINTARRAY *pa)
Reverse X and Y axis on a given POINTARRAY.
Definition: ptarray.c:369
static xmlNodePtr get_xlink_node(xmlNodePtr xnode)
Return a xmlNodePtr on a node referenced by a XLink or NULL otherwise.
#define SRID_UNKNOWN
Unknown SRID value.
Definition: liblwgeom.h:172
static bool is_xlink(xmlNodePtr node)
Return true if current node contains a simple XLink Return false otherwise.
static POINTARRAY * parse_gml_data(xmlNodePtr xnode, bool *hasz, int *root_srid)
Parse data coordinates.
LWGEOM * lwpoint_as_lwgeom(const LWPOINT *obj)
Definition: lwgeom.c:254
LWPOINT * lwpoint_construct(int srid, GBOX *bbox, POINTARRAY *point)
Definition: lwpoint.c:98
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