メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((134.925629989415 34.8452575832246, 134.925339915055 34.8454404958253, 134.924833225725 34.8452640871989, 134.924889872395 34.8449975918696, 134.924944245037 34.8447415326947, 134.925852746013 34.8451100725117, 134.925629989415 34.8452575832246)) ^^http://www.opengis.net/ont/geosparql#wktLiteral