我尝试在GraphDB中使用距离geoSPARQL函数，但是我没有得到任何结果。这是一个测试：
PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>
PREFIX wgs84_pos: <http://www.w3.org/2003/01/geo/wgs84_pos#>
PREFIX geoSparql: <http://www.ontotext.com/plugins/geosparql#>
PREFIX geosparql: <http://www.opengis.net/ont/geosparql#>
PREFIX geo: <http://www.opengis.net/ont/geosparql#>
PREFIX geof: <http://www.opengis.net/def/function/geosparql/>
PREFIX uom: <http://www.opengis.net/def/uom/OGC/1.0/>
SELECT ?d
WHERE {
BIND(geof:distance
("<http://www.opengis.net/def/crs/EPSG/0/2154> POINT (420670.213757502 6227859.48099221)",
"<http://www.opengis.net/def/crs/EPSG/0/2154> POINT(627006.586743735 6386592.47021308)",
uom:meter) as ?d)
}
敬祝好运。