PostGIS  2.5.0dev-r@@SVN_REVISION@@
static LWGEOM* parse_gml_line ( xmlNodePtr  xnode,
bool *  hasz,
int *  root_srid 
)
static

Parse GML lineString (2.1.2, 3.1.1)

Definition at line 958 of file lwgeom_in_gml.c.

References get_xlink_node(), gml_lwpgerror(), gml_reproject_pa(), is_xlink(), lwline_as_lwgeom(), lwline_construct(), lwline_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().

959 {
960  gmlSrs srs;
961  LWGEOM *geom;
962  POINTARRAY *pa;
963 
964  if (is_xlink(xnode)) xnode = get_xlink_node(xnode);
965 
966  if (xnode->children == NULL)
967  return lwline_as_lwgeom(lwline_construct_empty(*root_srid, 0, 0));
968 
969  pa = parse_gml_data(xnode->children, hasz, root_srid);
970  if (pa->npoints < 2) gml_lwpgerror("invalid GML representation", 36);
971 
972  parse_gml_srs(xnode, &srs);
973  if (srs.reverse_axis) pa = ptarray_flip_coordinates(pa);
974  if (!*root_srid)
975  {
976  *root_srid = srs.srid;
977  geom = (LWGEOM *) lwline_construct(*root_srid, NULL, pa);
978  }
979  else
980  {
981  if (srs.srid != *root_srid)
982  gml_reproject_pa(pa, srs.srid, *root_srid);
983  geom = (LWGEOM *) lwline_construct(SRID_UNKNOWN, NULL, pa);
984  }
985 
986  return geom;
987 }
LWLINE * lwline_construct_empty(int srid, char hasz, char hasm)
Definition: lwline.c:64
static void gml_lwpgerror(char *msg, int error_code)
Definition: lwgeom_in_gml.c:81
static void parse_gml_srs(xmlNodePtr xnode, gmlSrs *srs)
Parse gml srsName attribute.
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:368
static xmlNodePtr get_xlink_node(xmlNodePtr xnode)
Return a xmlNodePtr on a node referenced by a XLink or NULL otherwise.
LWGEOM * lwline_as_lwgeom(const LWLINE *obj)
Definition: lwgeom.c:329
LWLINE * lwline_construct(int srid, GBOX *bbox, POINTARRAY *points)
Definition: lwline.c:42
#define SRID_UNKNOWN
Unknown SRID value.
Definition: liblwgeom.h:187
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.
uint32_t npoints
Definition: liblwgeom.h:370

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