/** * @param Geometry $geometry The geometry to export as WKT. * * @return string The WKT representation of the given geometry. * * @throws GeometryIOException If the given geometry cannot be exported as WKT. */ protected function doWrite(Geometry $geometry) { $type = strtoupper($geometry->geometryType()); $cs = $geometry->coordinateSystem(); $hasZ = $cs->hasZ(); $hasM = $cs->hasM(); $dimensionality = ''; if ($hasZ || $hasM) { $dimensionality .= ' '; if ($hasZ) { $dimensionality .= 'Z'; } if ($hasM) { $dimensionality .= 'M'; } } if ($geometry instanceof GeometryCollection) { $isEmpty = $geometry->numGeometries() === 0; } else { $isEmpty = $geometry->isEmpty(); } if ($isEmpty) { return $type . $dimensionality . ' EMPTY'; } if ($geometry instanceof Point) { $data = $this->writePoint($geometry); } elseif ($geometry instanceof LineString) { $data = $this->writeLineString($geometry); } elseif ($geometry instanceof CircularString) { $data = $this->writeCircularString($geometry); } elseif ($geometry instanceof CompoundCurve) { $data = $this->writeCompoundCurve($geometry); } elseif ($geometry instanceof Triangle) { $data = $this->writePolygon($geometry); } elseif ($geometry instanceof Polygon) { $data = $this->writePolygon($geometry); } elseif ($geometry instanceof CurvePolygon) { $data = $this->writeCurvePolygon($geometry); } elseif ($geometry instanceof MultiPoint) { $data = $this->writeMultiPoint($geometry); } elseif ($geometry instanceof MultiLineString) { $data = $this->writeMultiLineString($geometry); } elseif ($geometry instanceof MultiPolygon) { $data = $this->writeMultiPolygon($geometry); } elseif ($geometry instanceof GeometryCollection) { $data = $this->writeGeometryCollection($geometry); } elseif ($geometry instanceof TIN) { $data = $this->writePolyhedralSurface($geometry); } elseif ($geometry instanceof PolyhedralSurface) { $data = $this->writePolyhedralSurface($geometry); } else { throw GeometryIOException::unsupportedGeometryType($geometry->geometryType()); } return $type . $dimensionality . $this->prettyPrintSpace . '(' . $data . ')'; }