メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.397648352823 43.0284303721154, 141.398686010413 43.0287955099052, 141.398171005014 43.0295878240645, 141.397751418922 43.0302313225765, 141.396733222357 43.0298578122645, 141.396711271565 43.0298922509626, 141.396315089647 43.0297725505166, 141.396216088537 43.0297439891433, 141.396043819749 43.0296942895607, 141.396270967859 43.0293107114024, 141.396472331939 43.0289680848219, 141.396685482239 43.0285979751422, 141.396952656835 43.0281477388894, 141.397679255676 43.0283862242112, 141.397648352823 43.0284303721154)) ^^http://www.opengis.net/ont/geosparql#wktLiteral