メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.751712729194 43.2048005404516, 141.751387535849 43.2051428180699, 141.750354327664 43.2062127143743, 141.749509502289 43.2057864234808, 141.749352812573 43.2057073923622, 141.749865535206 43.2051603727374, 141.750096052934 43.2049106588512, 141.750195301401 43.2047890747139, 141.750278474202 43.2046757876661, 141.750366240778 43.2045591448481, 141.75048142542 43.2044459973108, 141.75067687193 43.2042756697648, 141.750701192025 43.2042878726865, 141.751016438057 43.2044464306123, 141.751712729194 43.2048005404516)) ^^http://www.opengis.net/ont/geosparql#wktLiteral