メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.287097775508 43.1071523451102, 141.288464828148 43.1083770017379, 141.286971265293 43.1093033365282, 141.285508333849 43.1101773056707, 141.284098806741 43.108987420394, 141.284064786998 43.1089594241719, 141.282946041336 43.1080387321486, 141.284385241952 43.1071470152317, 141.286002672795 43.1061493172791, 141.287097775508 43.1071523451102)) ^^http://www.opengis.net/ont/geosparql#wktLiteral