PostGIS  2.2.7dev-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 945 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().

946 {
947  gmlSrs srs;
948  LWGEOM *geom;
949  POINTARRAY *pa;
950 
951  if (is_xlink(xnode)) xnode = get_xlink_node(xnode);
952 
953  if (xnode->children == NULL)
954  return lwline_as_lwgeom(lwline_construct_empty(*root_srid, 0, 0));
955 
956  pa = parse_gml_data(xnode->children, hasz, root_srid);
957  if (pa->npoints < 2) gml_lwpgerror("invalid GML representation", 36);
958 
959  parse_gml_srs(xnode, &srs);
960  if (srs.reverse_axis) pa = ptarray_flip_coordinates(pa);
961  if (!*root_srid)
962  {
963  *root_srid = srs.srid;
964  geom = (LWGEOM *) lwline_construct(*root_srid, NULL, pa);
965  }
966  else
967  {
968  if (srs.srid != *root_srid)
969  gml_reproject_pa(pa, srs.srid, *root_srid);
970  geom = (LWGEOM *) lwline_construct(SRID_UNKNOWN, NULL, pa);
971  }
972 
973  return geom;
974 }
LWLINE * lwline_construct_empty(int srid, char hasz, char hasm)
Definition: lwline.c:51
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.
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.
LWGEOM * lwline_as_lwgeom(const LWLINE *obj)
Definition: lwgeom.c:249
LWLINE * lwline_construct(int srid, GBOX *bbox, POINTARRAY *points)
Definition: lwline.c:29
#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.

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