メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.821547495717 35.3120171064196, 136.821511124635 35.3120395384441, 136.820804924933 35.3124751387208, 136.820674721879 35.3123937086933, 136.820270830938 35.3112227437209, 136.820450347517 35.3111860736322, 136.820875743948 35.3110925699979, 136.82169443867 35.3108972270548, 136.821547495717 35.3120171064196)) ^^http://www.opengis.net/ont/geosparql#wktLiteral