メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((138.035583953524 37.0796797209448, 138.03541305262 37.0798025297126, 138.033314774902 37.0811134874334, 138.033007690749 37.0807240210723, 138.033268276793 37.0801262311642, 138.033329412978 37.0796774655954, 138.033330788522 37.0794528954496, 138.033064884134 37.0790121302239, 138.03234086529 37.0780689386914, 138.03069289504 37.0760177702672, 138.033860782269 37.0750245074997, 138.037597908549 37.0738849742835, 138.038871390903 37.073926416944, 138.03908684447 37.0741471859041, 138.039246279927 37.0744202550355, 138.039546956265 37.075004619004, 138.039313815808 37.0750849521335, 138.039068726098 37.0751652382673, 138.040189605575 37.0765533787795, 138.040085666995 37.0766256984799, 138.037283755266 37.0784579091013, 138.035583953524 37.0796797209448)) ^^http://www.opengis.net/ont/geosparql#wktLiteral