@prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
@prefix xsd: <http://www.w3.org/2001/XMLSchema#> .
@prefix owl: <http://www.w3.org/2002/07/owl#> .
@prefix : <https://w3id.org/itsdata/location/v1/> .
@prefix dcterms: <http://purl.org/dc/terms/> .
@prefix its-core: <https://w3id.org/itsdata/core/v1/> .
@prefix cdm1: <https://w3id.org/citydata/part1/v1/> .
@prefix schema: <https://schema.org/> .
@prefix skos: <http://www.w3.org/2004/02/skos/core#> .
@prefix vann: <http://purl.org/vocab/vann/> .
@prefix sf: <http://www.opengis.net/ont/sf#> .

:PointPattern
    a owl:Ontology ;
    dcterms:title "ITS Point Referencing"@en ;
    skos:definition "A module of the ITS Location Ontology that defines concepts for point-based locations and representations of those locations."@en ;
    dcterms:creator "Kenneth Vaughn" ;
    dcterms:created "Draft" ;
    dcterms:modified "2026-04-29"^^xsd:date ;
    dcterms:license "http://creativecommons.org/licenses/by/4.0/" ;
    its-core:draft "true" ;
    owl:imports :LocationCorePattern ;
    owl:versionInfo "0.0.1" ;
    owl:versionIRI <https://w3id.org/itsdata/location/v1/PointPattern/r0.1> ;
    vann:preferredNamespacePrefix "its-location" ;
    vann:preferredNamespaceUri "https://w3id.org/itsdata/location/v1/" .

#################################################################
# Classes
#################################################################

:PointLocation
    a owl:Class ;
    rdfs:subClassOf :Location ;
    skos:definition "A spatial location with no length in any of the spatial dimensions."@en .

:PointRepresentation
    a owl:Class ;
    rdfs:subClassOf :Geometry ;
    skos:definition "A representation of a point location using a specific method (e.g., coordinates or an external code)."@en .

:PointByCoordinates
    a owl:Class ;
    rdfs:subClassOf :PointRepresentation ;
    rdfs:subClassOf :CoordinateGeometry ;
    skos:definition "A coordinate tuple defining the geodetic position of a single point location using a known geodetic reference system"@en .

:PointByGeoCoordinates
    a owl:Class ;
    rdfs:subClassOf :PointByCoordinates ;
    skos:definition "A point location representation encoded as latitude/longitude and optional elements, such as elevation and metadata."@en .

:PointByProjectedCoordinates
    a owl:Class ;
    rdfs:subClassOf :PointByCoordinates ;
    skos:definition "A point location representation encoded as projected coordinates and optional elements, such as elevation and metadata."@en .

:Elevation
    a owl:Class ;
    rdfs:subClassOf :LocationThing ;
    skos:definition "An elevation for a point location along with metadata."@en .

:ElevationHeightCode
    a owl:Class ;
    rdfs:subClassOf its-core:Code ;
    rdfs:subClassOf :LocationThing ;
    skos:definition "A code that identifies the height value for an elevation value  (e.g., 'ground layer 1', 'elevated layer 1', 'elevated layer 2', 'tunnel layer 1')."@en .

:ElevationReferenceCode
    a owl:Class ;
    rdfs:subClassOf its-core:Code ;
    rdfs:subClassOf :LocationThing ;
    skos:definition "A code that identifies the reference system for an elevation value  (e.g., 'ellipsoidal', 'gravityRelated', 'ground level', 'EPSG:5701', 'coded height')."@en .

:DistanceAccuracy
    a owl:Class ;
    rdfs:subClassOf :LocationThing ;
    skos:definition "A statement of distance accuracy for a point representation."@en .

:ElevationAccuracy
    a owl:Class ;
    rdfs:subClassOf :DistanceAccuracy ;
    skos:definition "A statement of elevation accuracy for a point representation."@en .

:PositionAccuracy
    a owl:Class ;
    rdfs:subClassOf :DistanceAccuracy ;
    skos:definition "A statement of positional accuracy for a point representation."@en .

:PositionConfidenceEllipse
    a owl:Class ;
    rdfs:subClassOf :LocationThing ;
    skos:definition "A confidence ellipse describing uncertainty of a point position in a horizontal plane."@en .

:MeasurementErrorCode
    a owl:Class ;
    rdfs:subClassOf its-core:Code ;
    rdfs:subClassOf :LocationThing ;
    skos:definition "A code identifying an error condition or qualification for a measurement value."@en .

:PointByCode
    a owl:Class ;
    rdfs:subClassOf :PointRepresentation ;
    rdfs:subClassOf :LocationCode ;
    skos:definition "A point location representation using a code that references an entry in an external location referencing system."@en .

#################################################################
# Properties 
#################################################################

:latitude
    a owl:DatatypeProperty ;
    schema:domainIncludes :PointByGeoCoordinates ;
    schema:rangeIncludes xsd:decimal ;
    skos:definition "Latitude of a point coordinate (decimal degrees; CRS implied or supplied by the representation context)."@en .

:longitude
    a owl:DatatypeProperty ;
    schema:domainIncludes :PointByGeoCoordinates ;
    schema:rangeIncludes xsd:decimal ;
    skos:definition "Longitude of a point coordinate (decimal degrees; CRS implied or supplied by the representation context)."@en .

:northing
    a owl:DatatypeProperty ;
    schema:domainIncludes :PointByProjectedCoordinates ;
    schema:rangeIncludes xsd:decimal ;
    skos:definition "The northerly (y) dimension of a point coordinate expressed in some linear unit."@en .

:easting
    a owl:DatatypeProperty ;
    schema:domainIncludes :PointByProjectedCoordinates ;
    schema:rangeIncludes xsd:decimal ;
    skos:definition "The easterly (x) dimension of a point coordinate expressed in some linear unit."@en .

:hasElevation
    a owl:ObjectProperty ;
    rdfs:subPropertyOf :LocationObjectProperty ;
    schema:domainIncludes :PointRepresentation ;
    schema:rangeIncludes :Elevation ;
    skos:definition "Associates a point representation with an elevation value."@en .

:hasElevationDistance
    a owl:ObjectProperty ;
    schema:domainIncludes :Elevation ;
    schema:rangeIncludes cdm1:Length ;
    skos:definition "Elevation distance of a point location, as measured from the elevation reference system."@en .

:hasElevationHeightCode
    a owl:ObjectProperty ;
    schema:domainIncludes :Elevation ;
    schema:rangeIncludes :ElevationHeightCode ;
    skos:definition "Coded elevation height value of a point location."@en .

:hasElevationReference
    a owl:ObjectProperty ;
    schema:domainIncludes :Elevation ;
    schema:rangeIncludes :ElevationReferenceCode ;
    skos:definition "Reference system for the elevation value."@en .

:hasElevationAccuracy
    a owl:ObjectProperty ;
    rdfs:subPropertyOf :LocationObjectProperty ;
    schema:domainIncludes :Elevation ;
    schema:rangeIncludes :ElevationAccuracy ;
    skos:definition "Associates a point representation with an elevation accuracy statement."@en .

:hasPositionAccuracy
    a owl:ObjectProperty ;
    rdfs:subPropertyOf :LocationObjectProperty ;
    schema:domainIncludes :PointRepresentation ;
    schema:rangeIncludes :PositionAccuracy ;
    skos:definition "Associates a point representation with a statement of positional accuracy."@en .

:hasPositionConfidenceEllipse
    a owl:ObjectProperty ;
    rdfs:subPropertyOf :LocationObjectProperty ;
    schema:domainIncludes :PointRepresentation ;
    schema:rangeIncludes :PositionConfidenceEllipse ;
    skos:definition "Associates a point representation with a confidence ellipse statement."@en .

:hasDistanceAccuracy
    a owl:ObjectProperty ;
    rdfs:subPropertyOf :LocationObjectProperty ;
    schema:domainIncludes :DistanceAccuracy ;
    schema:rangeIncludes cdm1:Length ;
    skos:definition "The upper limit of the accuracy, expressed as a simple length value (e.g., within 10 meters)."@en .

:confidencePercentage
    a owl:ObjectProperty ;
    rdfs:subPropertyOf :LocationObjectProperty ;
    schema:domainIncludes :DistanceAccuracy ;
    schema:rangeIncludes cdm1:Ratio ;
    skos:definition "Percent confidence in a reported value as defined by the percentile of the cumulative distribution of position errors (e.g., 95% confidence)."@en .

:distanceAccuracyErrorCode
    a owl:ObjectProperty ;
    rdfs:subPropertyOf :LocationObjectProperty ;
    schema:domainIncludes :DistanceAccuracy ;
    schema:rangeIncludes :MeasurementErrorCode ;
    skos:definition "A code that identifies the error code for a distance accuracy value."@en .

:semiMajorAxisLength
    a owl:ObjectProperty ;
    rdfs:subPropertyOf :LocationObjectProperty ;
    schema:domainIncludes :PositionConfidenceEllipse ;
    schema:rangeIncludes cdm1:Length ;
    skos:definition "Semi-major axis length of the confidence ellipse."@en .

:semiMinorAxisLength
    a owl:ObjectProperty ;
    rdfs:subPropertyOf :LocationObjectProperty ;
    schema:domainIncludes :PositionConfidenceEllipse ;
    schema:rangeIncludes cdm1:Length ;
    skos:definition "Semi-minor axis length of the confidence ellipse."@en .

:semiMajorAxisOrientation
    a owl:ObjectProperty ;
    rdfs:subPropertyOf :LocationObjectProperty ;
    schema:domainIncludes :PositionConfidenceEllipse ;
    schema:rangeIncludes its-core:Bearing ;
    skos:definition "Orientation of the semi-major axis of the confidence ellipse."@en .

:semiMajorAxisLengthErrorCode
    a owl:ObjectProperty ;
    rdfs:subPropertyOf :LocationObjectProperty ;
    schema:domainIncludes :PositionConfidenceEllipse ;
    schema:rangeIncludes :MeasurementErrorCode ;
    skos:definition "A code qualifying the semi-major axis length measurement."@en .

:semiMinorAxisLengthErrorCode
    a owl:ObjectProperty ;
    rdfs:subPropertyOf :LocationObjectProperty ;
    schema:domainIncludes :PositionConfidenceEllipse ;
    schema:rangeIncludes :MeasurementErrorCode ;
    skos:definition "A code qualifying the semi-minor axis length measurement."@en .

:semiMajorAxisOrientationErrorCode
    a owl:ObjectProperty ;
    rdfs:subPropertyOf :LocationObjectProperty ;
    schema:domainIncludes :PositionConfidenceEllipse ;
    schema:rangeIncludes :MeasurementErrorCode ;
    skos:definition "A code qualifying the semi-major axis orientation measurement."@en .

:bearing
    a owl:ObjectProperty ;
    rdfs:subPropertyOf :LocationObjectProperty ;
    schema:domainIncludes :PointLocation ;
    schema:rangeIncludes its-core:Bearing ;
    skos:definition "Bearing of a point location."@en .