メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((140.75557794012 42.8987828065421, 140.756390211812 42.8987433358381, 140.75691852343 42.8987210428624, 140.757038424674 42.8999140261454, 140.75705763273 42.9002402648214, 140.756941236978 42.9002469741786, 140.756509622156 42.9001029992559, 140.756476579813 42.8996920416703, 140.75565736639 42.8997291708157, 140.755649181994 42.8996124543565, 140.75507811585 42.8996341111694, 140.754833243919 42.899648705771, 140.7547108921 42.898828518102, 140.754765483701 42.8988259257799, 140.755007197627 42.8988190976443, 140.75557794012 42.8987828065421)) ^^http://www.opengis.net/ont/geosparql#wktLiteral