メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.898997216624 43.5622505822823, 141.899771793507 43.5637757613976, 141.900157925816 43.5645629231656, 141.900855322167 43.56590649072, 141.899804510863 43.5661617599221, 141.899173758094 43.5648029187396, 141.898789214864 43.564022966701, 141.8980368759 43.5625061122335, 141.897137748807 43.5606716353082, 141.897490042527 43.5605751815879, 141.898077834601 43.5604365527048, 141.898253399845 43.5607799576095, 141.898580414382 43.5614043900715, 141.898997216624 43.5622505822823)) ^^http://www.opengis.net/ont/geosparql#wktLiteral