メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.329198498564 43.7647062311757, 142.329838651787 43.7649082233275, 142.330322249812 43.7650686909708, 142.329915118664 43.7657954662429, 142.329689784204 43.7661832711137, 142.329671605435 43.7661772179532, 142.329170515641 43.7660285747811, 142.32892868762 43.7659282519419, 142.328548148564 43.7657964157946, 142.327964422546 43.7656197828198, 142.328257996416 43.7650959685425, 142.328437891538 43.7648015150353, 142.328603938702 43.7645199919395, 142.328829171041 43.7645964695822, 142.328865557567 43.7646088210077, 142.329198498564 43.7647062311757)) ^^http://www.opengis.net/ont/geosparql#wktLiteral