parse_kml_polygon()

static LWGEOM* parse_kml_polygon ( xmlNodePtr  xnode, bool *  hasz  )

static

Parse KML Polygon.

Definition at line 416 of file lwgeom_in_kml.c.

{
        int ring;
        xmlNodePtr xa, xb;
        POINTARRAY **ppa = NULL;
        int outer_rings = 0;
 
        for (xa = xnode->children ; xa != NULL ; xa = xa->next)
        {
 
                /* Polygon/outerBoundaryIs */
                if (xa->type != XML_ELEMENT_NODE) continue;
                if (!is_kml_namespace(xa, false)) continue;
                if (!is_kml_element(xa, "outerBoundaryIs")) continue;
 
                for (xb = xa->children ; xb != NULL ; xb = xb->next)
                {
 
                        if (xb->type != XML_ELEMENT_NODE) continue;
                        if (!is_kml_namespace(xb, false)) continue;
                        if (!is_kml_element(xb, "LinearRing")) continue;
 
                        ppa = (POINTARRAY**) lwalloc(sizeof(POINTARRAY*));
                        ppa[0] = parse_kml_coordinates(xb->children, hasz);
 
                        if (ppa[0]->npoints < 4)
                                lwpgerror("invalid KML representation");
 
                        if ((!*hasz && !ptarray_is_closed_2d(ppa[0])) ||
                            ( *hasz && !ptarray_is_closed_3d(ppa[0])))
                        {
                                POINT4D pt;
                                getPoint4d_p(ppa[0], 0, &pt);
                                ptarray_append_point(ppa[0], &pt, LW_TRUE);
                                lwpgnotice("forced closure on an un-closed KML polygon");
                        }
                        outer_rings++;
                }
        }
 
        if (outer_rings != 1)
                lwpgerror("invalid KML representation");
 
        for (ring=1, xa = xnode->children ; xa != NULL ; xa = xa->next)
        {
 
                /* Polygon/innerBoundaryIs */
                if (xa->type != XML_ELEMENT_NODE) continue;
                if (!is_kml_namespace(xa, false)) continue;
                if (!is_kml_element(xa, "innerBoundaryIs")) continue;
 
                for (xb = xa->children ; xb != NULL ; xb = xb->next)
                {
 
                        if (xb->type != XML_ELEMENT_NODE) continue;
                        if (!is_kml_namespace(xb, false)) continue;
                        if (!is_kml_element(xb, "LinearRing")) continue;
 
                        ppa = (POINTARRAY**) lwrealloc(ppa, sizeof(POINTARRAY*) * (ring + 1));
                        ppa[ring] = parse_kml_coordinates(xb->children, hasz);
 
                        if (ppa[ring]->npoints < 4)
                                lwpgerror("invalid KML representation");
 
                        if ((!*hasz && !ptarray_is_closed_2d(ppa[ring])) ||
                            ( *hasz && !ptarray_is_closed_3d(ppa[ring])))
                        {
                                POINT4D pt;
                                getPoint4d_p(ppa[ring], 0, &pt);
                                ptarray_append_point(ppa[ring], &pt, LW_TRUE);
                                lwpgnotice("forced closure on an un-closed KML polygon");
                        }
 
                        ring++;
                }
        }
 
        /* Exterior Ring is mandatory */
        if (ppa == NULL || ppa[0] == NULL) lwpgerror("invalid KML representation");
 
        return (LWGEOM *) lwpoly_construct(4326, NULL, ring, ppa);
}

References getPoint4d_p(), is_kml_element(), is_kml_namespace(), LW_TRUE, lwalloc(), lwpoly_construct(), lwrealloc(), parse_kml_coordinates(), ptarray_append_point(), ptarray_is_closed_2d(), and ptarray_is_closed_3d().

Referenced by parse_kml().

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