PostGIS  2.1.10dev-r@@SVN_REVISION@@
static LWGEOM* parse_gml_linearring ( xmlNodePtr  xnode,
bool *  hasz,
int *  root_srid 
)
static

Parse GML LinearRing (3.1.1)

Definition at line 1088 of file lwgeom_in_gml.c.

References get_xlink_node(), gml_lwerror(), gml_reproject_pa(), is_xlink(), lwalloc(), lwpoly_construct(), parse_gml_data(), parse_gml_srs(), ptarray_flip_coordinates(), ptarray_is_closed_2d(), ptarray_is_closed_3d(), struct_gmlSrs::reverse_axis, struct_gmlSrs::srid, and SRID_UNKNOWN.

Referenced by parse_gml().

1089 {
1090  gmlSrs srs;
1091  LWGEOM *geom;
1092  POINTARRAY **ppa = NULL;
1093 
1094  if (is_xlink(xnode)) xnode = get_xlink_node(xnode);
1095  parse_gml_srs(xnode, &srs);
1096 
1097  ppa = (POINTARRAY**) lwalloc(sizeof(POINTARRAY*));
1098  ppa[0] = parse_gml_data(xnode->children, hasz, root_srid);
1099 
1100  if (ppa[0]->npoints < 4
1101  || (!*hasz && !ptarray_is_closed_2d(ppa[0]))
1102  || (*hasz && !ptarray_is_closed_3d(ppa[0])))
1103  gml_lwerror("invalid GML representation", 42);
1104 
1105  if (srs.reverse_axis)
1106  ppa[0] = ptarray_flip_coordinates(ppa[0]);
1107 
1108  if (srs.srid != *root_srid && *root_srid != SRID_UNKNOWN)
1109  gml_reproject_pa(ppa[0], srs.srid, *root_srid);
1110 
1111  geom = (LWGEOM *) lwpoly_construct(*root_srid, NULL, 1, ppa);
1112 
1113  return geom;
1114 }
static void parse_gml_srs(xmlNodePtr xnode, gmlSrs *srs)
Parse gml srsName attribute.
int ptarray_is_closed_3d(const POINTARRAY *pa)
Definition: ptarray.c:678
int ptarray_is_closed_2d(const POINTARRAY *pa)
Definition: ptarray.c:672
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:354
static xmlNodePtr get_xlink_node(xmlNodePtr xnode)
Return a xmlNodePtr on a node referenced by a XLink or NULL otherwise.
LWGEOM * geom
LWPOLY * lwpoly_construct(int srid, GBOX *bbox, uint32_t nrings, POINTARRAY **points)
Definition: lwpoly.c:29
#define SRID_UNKNOWN
Unknown SRID value.
Definition: liblwgeom.h:154
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.
static void gml_lwerror(char *msg, int error_code)
Definition: lwgeom_in_gml.c:68
void * lwalloc(size_t size)
Definition: lwutil.c:175

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