メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((143.354283660308 44.3540572754971, 143.353672781972 44.35426396305, 143.352885341893 44.3545303967818, 143.35230784678 44.3547251875481, 143.352034538609 44.3543184243125, 143.351391793448 44.3528296835075, 143.353107796765 44.3525709575972, 143.353154509186 44.3525641071747, 143.353846818703 44.3524623511448, 143.354283660308 44.3540572754971)) ^^http://www.opengis.net/ont/geosparql#wktLiteral