メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.348168723777 43.7993133730481, 142.348532450793 43.7995601720392, 142.348575800078 43.7995895983234, 142.34884462748 43.7997779703463, 142.348928813586 43.7998289857187, 142.349167764504 43.7999879003556, 142.349421968805 43.8001596865136, 142.348742441536 43.8006358782504, 142.348051584189 43.8010998038343, 142.345863683669 43.7995554760785, 142.345475908755 43.7992817408686, 142.345854217173 43.7990200546478, 142.34609996365 43.7988427604371, 142.34681691226 43.7983363137741, 142.347467873125 43.7988105734701, 142.348085658834 43.799257010402, 142.348168723777 43.7993133730481)) ^^http://www.opengis.net/ont/geosparql#wktLiteral