public static Attribute unmarshalFrom(GeometryElement element) throws ConversionFailedException { AttributeImpl attribute = null; GML311ToJTSGeometryConverter converter = new GML311ToJTSGeometryConverter(); WKTWriter wktWriter = new WKTWriter(); for (Value xmlValue : element.getValue()) { JAXBElement<AbstractGeometryType> xmlGeometry = xmlValue.getGeometry(); Geometry geometry = converter.createGeometry(new DefaultRootObjectLocator(xmlValue), xmlGeometry.getValue()); String wkt = wktWriter.write(geometry); if (attribute == null) { attribute = new AttributeImpl(element.getName(), wkt); } else { attribute.addValue(wkt); } } return attribute; }