メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.859021971366 43.330616947295, 141.859240386389 43.3313479776051, 141.858188382816 43.3315116977675, 141.858070700876 43.3310994546024, 141.85798421018 43.3307947090334, 141.857842175179 43.3303350518622, 141.858897037459 43.330165718973, 141.859021971366 43.330616947295)) ^^http://www.opengis.net/ont/geosparql#wktLiteral