メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.990010693793 34.8790695601038, 136.989767213834 34.8794091661229, 136.9896746227 34.879480727325, 136.989589719103 34.8792195210431, 136.989236842917 34.8782193267453, 136.989001465783 34.8775390526657, 136.990553251541 34.8782440741476, 136.990523550641 34.8782911484924, 136.990010693793 34.8790695601038)) ^^http://www.opengis.net/ont/geosparql#wktLiteral