メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.458937495232 43.7704884804827, 142.459144861144 43.7727969570019, 142.459145770706 43.7728069590981, 142.457662564135 43.7728843068041, 142.455527410738 43.7730025103926, 142.455477418338 43.7725126921806, 142.455273255322 43.7706801427667, 142.455193223115 43.7699618338648, 142.457423115955 43.769839956684, 142.458867794393 43.7697675922216, 142.458937495232 43.7704884804827)) ^^http://www.opengis.net/ont/geosparql#wktLiteral