メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.655544782404 42.8304434082343, 141.656052626598 42.8312003680469, 141.655326411516 42.831466882662, 141.654163785301 42.8318911272581, 141.652993973824 42.8323205969587, 141.652649354068 42.8318281550862, 141.652324339084 42.8313396830847, 141.651993657182 42.830879524348, 141.653193556353 42.8304590837466, 141.654359252737 42.8300413357517, 141.655077120546 42.8297720396489, 141.655544782404 42.8304434082343)) ^^http://www.opengis.net/ont/geosparql#wktLiteral