メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.396508951711 44.1623413101892, 142.395844501386 44.1622453137395, 142.39581048964 44.162376655795, 142.39511003527 44.1622715926112, 142.395492524214 44.1610065251741, 142.396836466358 44.1612274536356, 142.396595523091 44.1620469050803, 142.396537877521 44.1622429362611, 142.396508951711 44.1623413101892)) ^^http://www.opengis.net/ont/geosparql#wktLiteral