Simple Features Topological Functions
Metadata
- IRI
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http://www.opengis.net/def/function/sf - Definition
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All Simple Features Functions
- Publisher
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https://defs.opengis.net/org/ogc
- Creator
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https://defs.opengis.net/org/geosparql-swg
- Date Created
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2025-10-14
- Date Modified
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2026-01-19
- Copyright Notice
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(c) 2026 Open Geospatial Consortium
- History Note
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Defined since GeoSPARQL 1.0
- Source
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http://www.opengis.net/doc/geosparql/1.1
- See Also
-
http://www.opengis.net/doc/geosparql/1.1
- Version Iri
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http://www.opengis.net/def/function/geosparql/1.1
Concept Definitions
contains
| IRI |
http://www.opengis.net/def/function/geosparql/sfContains
|
| Preferred Label | contains |
| Definition | A query function that returns true if the first geometry argument spatially contains the second geometry argument. DE-9IM: T*****FF* |
| Is Defined By | http://www.opengis.net/spec/geosparql/1.1/req/geometry-topology-extension/sf-query-functions |
| Example | http://www.opengis.net/doc/IS/geosparql/1.1#B.2.2.1 |
| Source | http://www.opengis.net/doc/geosparql/1.1 |
| See Also | http://www.opengis.net/doc/geosparql/1.1 |
| Status | http://www.opengis.net/def/status/valid |
| Expects | n6305b4bb2c964bacb5c7ae8f8775f399b1 |
| Returns | n6305b4bb2c964bacb5c7ae8f8775f399b3 |
crosses
| IRI |
http://www.opengis.net/def/function/geosparql/sfCrosses
|
| Preferred Label | crosses |
| Definition | A query function that returns true if the first geometry argument spatially crosses the second geometry argument. DE-9IM: T*T***T** |
| Is Defined By | http://www.opengis.net/spec/geosparql/1.1/req/geometry-topology-extension/sf-query-functions |
| Source | http://www.opengis.net/doc/geosparql/1.1 |
| See Also | http://www.opengis.net/doc/geosparql/1.1 |
| Status | http://www.opengis.net/def/status/valid |
| Expects | n6305b4bb2c964bacb5c7ae8f8775f399b4 |
| Returns | n6305b4bb2c964bacb5c7ae8f8775f399b6 |
disjoint
| IRI |
http://www.opengis.net/def/function/geosparql/sfDisjoint
|
| Preferred Label | disjoint |
| Definition | A query function that returns true if the input geometries are disjoint. DE-9IM: FF*FF**** |
| Is Defined By | http://www.opengis.net/spec/geosparql/1.1/req/geometry-topology-extension/sf-query-functions |
| Source | http://www.opengis.net/doc/geosparql/1.1 |
| See Also | http://www.opengis.net/doc/geosparql/1.1 |
| Status | http://www.opengis.net/def/status/valid |
| Expects | n6305b4bb2c964bacb5c7ae8f8775f399b7 |
| Returns | n6305b4bb2c964bacb5c7ae8f8775f399b9 |
equals
| IRI |
http://www.opengis.net/def/function/geosparql/sfEquals
|
| Preferred Label | equals |
| Definition | A query function that returns true if the input geometries are equal. DE-9IM: TFFFTFFFT |
| Is Defined By | http://www.opengis.net/spec/geosparql/1.1/req/geometry-topology-extension/sf-query-functions |
| Source | http://www.opengis.net/doc/geosparql/1.1 |
| See Also | http://www.opengis.net/doc/geosparql/1.1 |
| Status | http://www.opengis.net/def/status/valid |
| Expects | n6305b4bb2c964bacb5c7ae8f8775f399b10 |
| Returns | n6305b4bb2c964bacb5c7ae8f8775f399b12 |
intersects
| IRI |
http://www.opengis.net/def/function/geosparql/sfIntersects
|
| Preferred Label | intersects |
| Definition | A query function that returns true if the input geometries intersect. DE-9IM: T******** ^ *T******* ^ ***T***** ^ ****T**** |
| Is Defined By | http://www.opengis.net/spec/geosparql/1.1/req/geometry-topology-extension/sf-query-functions |
| Source | http://www.opengis.net/doc/geosparql/1.1 |
| See Also | http://www.opengis.net/doc/geosparql/1.1 |
| Status | http://www.opengis.net/def/status/valid |
| Expects | n6305b4bb2c964bacb5c7ae8f8775f399b13 |
| Returns | n6305b4bb2c964bacb5c7ae8f8775f399b15 |
overlaps
| IRI |
http://www.opengis.net/def/function/geosparql/sfOverlaps
|
| Preferred Label | overlaps |
| Definition | A query function that returns true if the first geometry argument spatially overlaps the second geometry argument. DE-9IM: T*T***T** |
| Is Defined By | http://www.opengis.net/spec/geosparql/1.1/req/geometry-topology-extension/sf-query-functions |
| Source | http://www.opengis.net/doc/geosparql/1.1 |
| See Also | http://www.opengis.net/doc/geosparql/1.1 |
| Status | http://www.opengis.net/def/status/valid |
| Expects | n6305b4bb2c964bacb5c7ae8f8775f399b16 |
| Returns | n6305b4bb2c964bacb5c7ae8f8775f399b18 |
touches
| IRI |
http://www.opengis.net/def/function/geosparql/sfTouches
|
| Preferred Label | touches |
| Definition | A query function that returns true if the input geometries touch. DE-9IM: FT******* ^ F**T***** ^ F***T**** |
| Is Defined By | http://www.opengis.net/spec/geosparql/1.1/req/geometry-topology-extension/sf-query-functions |
| Example | http://www.opengis.net/doc/IS/geosparql/1.1#B.2.2.3 |
| Source | http://www.opengis.net/doc/geosparql/1.1 |
| See Also | http://www.opengis.net/doc/geosparql/1.1 |
| Status | http://www.opengis.net/def/status/valid |
| Expects | n6305b4bb2c964bacb5c7ae8f8775f399b19 |
| Returns | n6305b4bb2c964bacb5c7ae8f8775f399b21 |
within
| IRI |
http://www.opengis.net/def/function/geosparql/sfWithin
|
| Preferred Label | within |
| Definition | A query function that returns true if the first geometry argument is spatially within the second geometry argument. DE-9IM: T*F**F*** |
| Is Defined By | http://www.opengis.net/spec/geosparql/1.1/req/geometry-topology-extension/sf-query-functions |
| Example | http://www.opengis.net/doc/IS/geosparql/1.1#B.2.2.2 |
| Source | http://www.opengis.net/doc/geosparql/1.1 |
| See Also | http://www.opengis.net/doc/geosparql/1.1 |
| Status | http://www.opengis.net/def/status/valid |
| Expects | n6305b4bb2c964bacb5c7ae8f8775f399b22 |
| Returns | n6305b4bb2c964bacb5c7ae8f8775f399b24 |
Namespaces
- cs
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http://www.opengis.net/def/function/sf - dcterms
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http://purl.org/dc/terms/ - fno
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https://w3id.org/function/ontology# - geo
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http://www.opengis.net/ont/geosparql# - geof
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http://www.opengis.net/def/function/geosparql/ - geofo
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http://www.opengis.net/def/function/output/geosparql/ - geofp
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http://www.opengis.net/def/function/parameter/geosparql/ - ns1
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http://www.opengis.net/spec/geosparql/1.1/req/geometry-topology-extension/ - ns2
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http://www.opengis.net/doc/geosparql/ - owl
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http://www.w3.org/2002/07/owl# - policy
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http://www.opengis.net/def/metamodel/ogc-na/ - rdf
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http://www.w3.org/1999/02/22-rdf-syntax-ns# - rdfs
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http://www.w3.org/2000/01/rdf-schema# - schema
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https://schema.org/ - sd
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http://www.w3.org/ns/sparql-service-description# - skos
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http://www.w3.org/2004/02/skos/core# - spec11
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http://www.opengis.net/doc/IS/geosparql/1.1# - status
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http://www.opengis.net/def/status/ - xsd
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http://www.w3.org/2001/XMLSchema#