メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.286837401726 43.1020646211232, 141.287417407556 43.1025907743846, 141.288062911725 43.1031517251561, 141.286459416924 43.1041305799653, 141.28486610527 43.1051240566141, 141.283646938916 43.1040191075029, 141.282430611763 43.1029251423136, 141.284026740828 43.1019469835636, 141.28562527333 43.1009652379299, 141.285809991681 43.1011326990564, 141.286047893538 43.1013483600274, 141.286837401726 43.1020646211232)) ^^http://www.opengis.net/ont/geosparql#wktLiteral