geo:equals is a filter function and not a property function. This means it returns a boolean value, thus, you have to use it in a FILTER
(untested) FILTER(geo:equals(?object, "POLYGON((8.463699817657472 48.99872928913063,8.463887572288515 48.998644821906865,8.46399486064911 48.998764483764916,8.46425771713257 48.99865538031766,8.464375734329225 48.998746886450874,8.463919758796694 48.99893693711346,8.463699817657472 48.99872928913063))" ) ) On 18.04.20 12:19, manoj deshpande wrote: > I am using Apache Jena Fuseki Server for Storing Geo Coordinates of > location. How to find out that if two polygons or two rectangles > intersect each other inside Fuseki. > > I have stored geocoordinates in WKT serialization format. When I > execute below query > > |*PREFIX xsd: <http://www.w3.org/2001/XMLSchema#> PREFIX rdf: > <http://www.w3.org/1999/02/22-rdf-syntax-ns#> PREFIX geo: > <http://www.opengis.net/ont/geosparql#> PREFIX xsd: > <http://www.w3.org/2001/XMLSchema#> PREFIX rdfs: > <http://www.w3.org/2000/01/rdf-schema#> PREFIX : > <http://example.org/#> PREFIX geo: > <http://www.opengis.net/ont/geosparql#> PREFIX spatial: > <http://jena.apache.org/spatial#> SELECT ?object WHERE { GRAPH > <http://project/base/default> { ?subject geo:asWKT ?object . } }*||| > I get these below results. > |object 1 "POLYGON((8.463699817657472 > 48.99872928913063,8.463887572288515 > 48.998644821906865,8.46399486064911 > 48.998764483764916,8.46425771713257 > 48.99865538031766,8.464375734329225 > 48.998746886450874,8.463919758796694 > 48.99893693711346,8.463699817657472 48.99872928913063))" 2 > "POLYGON((8.463560342788698 48.99847940651206,8.463560342788698 > 48.99864834137738,8.46377491950989 48.99864834137738,8.46377491950989 > 48.99847940651206,8.463560342788698 48.99847940651206))" 3 > "POLYGON((8.463447690010073 48.99835974396915,8.463447690010073 > 48.99849348443939,8.463646173477175 > 48.99849348443939,8.463646173477175 > 48.99835974396915,8.463447690010073 48.99835974396915))" 4 > "POLYGON((8.463254570961 48.99821544463795,8.463254570961 > 48.99838438039854,8.463635444641115 > 48.99838438039854,8.463635444641115 48.99821544463795,8.463254570961 > 48.99821544463795))" 5 "POLYGON((8.463689088821413 > 48.99826823712468,8.463689088821413 48.99845477012966,8.46402168273926 > 48.99845477012966,8.46402168273926 48.99826823712468,8.463689088821413 > 48.99826823712468))" 6 "POLYGON((8.463892936706545 > 48.99843013373508,8.463892936706545 > 48.998588510344774,8.464316725730898 > 48.998588510344774,8.464316725730898 > 48.99843013373508,8.463892936706545 48.99843013373508))" 7 > "POLYGON((8.463093638420107 48.99805354732974,8.463093638420107 > 48.998243600637835,8.463737368583681 > 48.998243600637835,8.463737368583681 > 48.99805354732974,8.463093638420107 48.99805354732974))" 8 > "POLYGON((8.463619351387026 48.99797963751407,8.463619351387026 > 48.998180249615714,8.464118242263796 > 48.998180249615714,8.464118242263796 > 48.99797963751407,8.463619351387026 48.99797963751407))" 9 > "POLYGON((8.464407920837404 48.998303432084754,8.464407920837404 > 48.99857443244431,8.46477270126343 48.99857443244431,8.46477270126343 > 48.998303432084754,8.464407920837404 48.998303432084754))" 10 > "POLYGON((8.464225530624391 48.99806762537742,8.464225530624391 > 48.99839141937611,8.464820981025698 > 48.99839141937611,8.464820981025698 > 48.99806762537742,8.464225530624391 48.99806762537742))"| > |Then later I want to filter out these geo:WKT objects based on > geo:intersection (Intersection or equals or contains methods). And I > updated my query as below. | > | > |*PREFIX xsd: <http://www.w3.org/2001/XMLSchema#> PREFIX rdf: > <http://www.w3.org/1999/02/22-rdf-syntax-ns#> PREFIX geo: > <http://www.opengis.net/ont/geosparql#> PREFIX xsd: > <http://www.w3.org/2001/XMLSchema#> PREFIX rdfs: > <http://www.w3.org/2000/01/rdf-schema#> PREFIX : > <http://example.org/#> PREFIX geo: > <http://www.opengis.net/ont/geosparql#> PREFIX spatial: > <http://jena.apache.org/spatial#> SELECT ?object WHERE { GRAPH > <http://project/base/default> { ?subject geo:asWKT ?object . ?object > geo:equals "POLYGON((8.463699817657472 > 48.99872928913063,8.463887572288515 > 48.998644821906865,8.46399486064911 > 48.998764483764916,8.46425771713257 > 48.99865538031766,8.464375734329225 > 48.998746886450874,8.463919758796694 > 48.99893693711346,8.463699817657472 48.99872928913063))" } } *| > |Which should result me atleast the coordinates of first geo object > which really equals the POLYGON coordinates but I get empty results as > shown in below image. Please suggest me where I am getting it wrong.**| > But I get no results as attached in snapshot. Please help me regarding this.|
