/** * Returns the z-coordinate value for point. * * @param node xml element containing gml object(s) * @return z double value * @throws QueryException query exception */ @Deterministic public Dbl z(final ANode node) throws QueryException { final Geometry geo = geo(node, Q_GML_POINT); if (geo == null && checkGeo(node) != null) throw GeoErrors.geoType(node.qname().local(), "Line"); return Dbl.get(geo.getCoordinate().z); }