メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.275958137168 43.1074774223551, 141.275508449927 43.1070772242385, 141.275337929653 43.1069168309438, 141.274551733601 43.1061773831422, 141.274503217738 43.1061317489655, 141.277840825837 43.1038909846153, 141.278688151834 43.1044553878453, 141.27922890973 43.1049052944696, 141.279518616817 43.1051403264503, 141.275958137168 43.1074774223551)) ^^http://www.opengis.net/ont/geosparql#wktLiteral