This page is part of the FHIR Specification (v4.5.0: R5 Preview #3). The current version which supercedes this version is 5.0.0. For a full list of available versions, see the Directory of published versions . Page versions: R4B R4 R3

• Content
• Detailed Descriptions
• Mappings
• XML
• JSON

Extension: Geolocation

URL for this extension:

http://hl7.org/fhir/StructureDefinition/geolocation

Status: draft. Extension maintained by: Health Level Seven International (FHIR Infrastructure)

The absolute geographic location of the Location, expressed using the WGS84 datum (This is the same co-ordinate system used in KML).

Comment:

The extension can be further extended to include unique geolocation identifiers, confidence, altitude, etc.

Context of Use: Use on Element ID Address

Extension Content

• Summary
• Full Structure
• XML
• JSON
• All

Summary

Name	Flags	Card.	Type	Description & Constraints
Geolocation		0..1	Extension	URL = http://hl7.org/fhir/StructureDefinition/geolocation Geolocation: The absolute geographic location of the Location, expressed using the WGS84 datum (This is the same co-ordinate system used in KML). Use on Element ID Address
latitude		1..1	decimal	Latitude. The value domain and the interpretation are the same as for the text of the latitude element in KML (see notes below).
longitude		1..1	decimal	Longitude. The value domain and the interpretation are the same as for the text of the longitude element in KML (see notes below).
Documentation for this format

Full Structure

Name	Flags	Card.	Type	Description & Constraints
extension		0..1	Extension	URL = http://hl7.org/fhir/StructureDefinition/geolocation Geolocation: The absolute geographic location of the Location, expressed using the WGS84 datum (This is the same co-ordinate system used in KML). Use on Element ID Address
extension	I	0..*	Extension	Additional content defined by implementations Slice: Unordered, Open by value:url
extension:latitude	I	1..1	Extension	Latitude with WGS84 datum
id		0..1	string	Unique id for inter-element referencing
extension	I	0..0
url		1..1	uri	"latitude"
value[x]	I	1..1	decimal	Value of extension
extension:longitude	I	1..1	Extension	Longitude with WGS84 datum
id		0..1	string	Unique id for inter-element referencing
extension	I	0..0
url		1..1	uri	"longitude"
value[x]	I	1..1	decimal	Value of extension
url		1..1	uri	"http://hl7.org/fhir/StructureDefinition/geolocation"
value[x]	I	0..0
valueBase64Binary			base64Binary
valueBoolean			boolean
valueCanonical			canonical(Any)
valueCode			code
valueDate			date
valueDateTime			dateTime
valueDecimal			decimal
valueId			id
valueInstant			instant
valueInteger			integer
valueInteger64			integer64
valueMarkdown			markdown
valueOid			oid
valuePositiveInt			positiveInt
valueString			string
valueTime			time
valueUnsignedInt			unsignedInt
valueUri			uri
valueUrl			url
valueUuid			uuid
valueAddress			Address
valueAge			Age
valueAnnotation			Annotation
valueAttachment			Attachment
valueCodeableConcept			CodeableConcept
valueCoding			Coding
valueContactPoint			ContactPoint
valueCount			Count
valueDistance			Distance
valueDuration			Duration
valueHumanName			HumanName
valueIdentifier			Identifier
valueMoney			Money
valuePeriod			Period
valueQuantity			Quantity
valueRange			Range
valueRatio			Ratio
valueReference			Reference(Any)
valueSampledData			SampledData
valueSignature			Signature
valueTiming			Timing
valueContactDetail			ContactDetail
valueContributor			Contributor
valueDataRequirement			DataRequirement
valueExpression			Expression
valueParameterDefinition			ParameterDefinition
valueRelatedArtifact			RelatedArtifact
valueTriggerDefinition			TriggerDefinition
valueUsageContext			UsageContext
valueDosage			Dosage
valueMeta			Meta
Documentation for this format

XML Template

<!-- Geolocation -->

<extension xmlns="http://hl7.org/fhir"
     url="http://hl7.org/fhir/StructureDefinition/geolocation" >
 <-- extension sliced by value:url  in the specified orderOpen-->
 <extension url="latitude">  1..1 Extension  <!--  1..1 Latitude with WGS84 datum -->
  <valueDecimal value="[decimal]"/><!--  1..1 Value of extension -->
 </extension>
 <extension url="longitude">  1..1 Extension  <!--  1..1 Longitude with WGS84 datum -->
  <valueDecimal value="[decimal]"/><!--  1..1 Value of extension -->
 </extension>
</extension>

JSON Template

{ // Geolocation
    "extension" : [ //  sliced by value:url  in the specified order, Open 
      { // Latitude with WGS84 datum // C? R! 
        // from Element: extension
        "extension" : [ //  sliced by value:url  in the specified order, Open ]
        "url" : "latitude", // R! 
        "valueDecimal" : <decimal> // C? R! Value of extension
      },
      { // Longitude with WGS84 datum // C? R! 
        // from Element: extension
        "extension" : [ //  sliced by value:url  in the specified order, Open ]
        "url" : "longitude", // R! 
        "valueDecimal" : <decimal> // C? R! Value of extension
      }
    ],
    "url" : "http://hl7.org/fhir/StructureDefinition/geolocation", // R! 
// value[x]: Value of extension. One of these 51:
  }

Summary

Name	Flags	Card.	Type	Description & Constraints
Geolocation		0..1	Extension	URL = http://hl7.org/fhir/StructureDefinition/geolocation Geolocation: The absolute geographic location of the Location, expressed using the WGS84 datum (This is the same co-ordinate system used in KML). Use on Element ID Address
latitude		1..1	decimal	Latitude. The value domain and the interpretation are the same as for the text of the latitude element in KML (see notes below).
longitude		1..1	decimal	Longitude. The value domain and the interpretation are the same as for the text of the longitude element in KML (see notes below).
Documentation for this format

Full Structure

Name	Flags	Card.	Type	Description & Constraints
extension		0..1	Extension	URL = http://hl7.org/fhir/StructureDefinition/geolocation Geolocation: The absolute geographic location of the Location, expressed using the WGS84 datum (This is the same co-ordinate system used in KML). Use on Element ID Address
extension	I	0..*	Extension	Additional content defined by implementations Slice: Unordered, Open by value:url
extension:latitude	I	1..1	Extension	Latitude with WGS84 datum
id		0..1	string	Unique id for inter-element referencing
extension	I	0..0
url		1..1	uri	"latitude"
value[x]	I	1..1	decimal	Value of extension
extension:longitude	I	1..1	Extension	Longitude with WGS84 datum
id		0..1	string	Unique id for inter-element referencing
extension	I	0..0
url		1..1	uri	"longitude"
value[x]	I	1..1	decimal	Value of extension
url		1..1	uri	"http://hl7.org/fhir/StructureDefinition/geolocation"
value[x]	I	0..0
valueBase64Binary			base64Binary
valueBoolean			boolean
valueCanonical			canonical(Any)
valueCode			code
valueDate			date
valueDateTime			dateTime
valueDecimal			decimal
valueId			id
valueInstant			instant
valueInteger			integer
valueInteger64			integer64
valueMarkdown			markdown
valueOid			oid
valuePositiveInt			positiveInt
valueString			string
valueTime			time
valueUnsignedInt			unsignedInt
valueUri			uri
valueUrl			url
valueUuid			uuid
valueAddress			Address
valueAge			Age
valueAnnotation			Annotation
valueAttachment			Attachment
valueCodeableConcept			CodeableConcept
valueCoding			Coding
valueContactPoint			ContactPoint
valueCount			Count
valueDistance			Distance
valueDuration			Duration
valueHumanName			HumanName
valueIdentifier			Identifier
valueMoney			Money
valuePeriod			Period
valueQuantity			Quantity
valueRange			Range
valueRatio			Ratio
valueReference			Reference(Any)
valueSampledData			SampledData
valueSignature			Signature
valueTiming			Timing
valueContactDetail			ContactDetail
valueContributor			Contributor
valueDataRequirement			DataRequirement
valueExpression			Expression
valueParameterDefinition			ParameterDefinition
valueRelatedArtifact			RelatedArtifact
valueTriggerDefinition			TriggerDefinition
valueUsageContext			UsageContext
valueDosage			Dosage
valueMeta			Meta
Documentation for this format

XML Template

<!-- Geolocation -->

<extension xmlns="http://hl7.org/fhir"
     url="http://hl7.org/fhir/StructureDefinition/geolocation" >
 <-- extension sliced by value:url  in the specified orderOpen-->
 <extension url="latitude">  1..1 Extension  <!--  1..1 Latitude with WGS84 datum -->
  <valueDecimal value="[decimal]"/><!--  1..1 Value of extension -->
 </extension>
 <extension url="longitude">  1..1 Extension  <!--  1..1 Longitude with WGS84 datum -->
  <valueDecimal value="[decimal]"/><!--  1..1 Value of extension -->
 </extension>
</extension>

JSON Template

{ // Geolocation
    "extension" : [ //  sliced by value:url  in the specified order, Open 
      { // Latitude with WGS84 datum // C? R! 
        // from Element: extension
        "extension" : [ //  sliced by value:url  in the specified order, Open ]
        "url" : "latitude", // R! 
        "valueDecimal" : <decimal> // C? R! Value of extension
      },
      { // Longitude with WGS84 datum // C? R! 
        // from Element: extension
        "extension" : [ //  sliced by value:url  in the specified order, Open ]
        "url" : "longitude", // R! 
        "valueDecimal" : <decimal> // C? R! Value of extension
      }
    ],
    "url" : "http://hl7.org/fhir/StructureDefinition/geolocation", // R! 
// value[x]: Value of extension. One of these 51:
  }

Constraints

• ele-1: All FHIR elements must have a @value or children (xpath: @value|f:*|h:div)
• ext-1: Must have either extensions or value[x], not both (xpath: exists(f:extension)!=exists(f:*[starts-with(local-name(.), 'value')]))
• ele-1: On Extension.extension: All FHIR elements must have a @value or children (xpath on Extension.extension: @value|f:*|h:div)
• ext-1: On Extension.extension: Must have either extensions or value[x], not both (xpath on Extension.extension: exists(f:extension)!=exists(f:*[starts-with(local-name(.), "value")]))
• ele-1: On Extension.extension: All FHIR elements must have a @value or children (xpath on Extension.extension: @value|f:*|h:div)
• ext-1: On Extension.extension: Must have either extensions or value[x], not both (xpath on Extension.extension: exists(f:extension)!=exists(f:*[starts-with(local-name(.), "value")]))
• ele-1: On Extension.extension.extension: All FHIR elements must have a @value or children (xpath on Extension.extension.extension: @value|f:*|h:div)
• ext-1: On Extension.extension.extension: Must have either extensions or value[x], not both (xpath on Extension.extension.extension: exists(f:extension)!=exists(f:*[starts-with(local-name(.), "value")]))
• ele-1: On Extension.extension.value[x]: All FHIR elements must have a @value or children (xpath on Extension.extension.value[x]: @value|f:*|h:div)
• ele-1: On Extension.extension: All FHIR elements must have a @value or children (xpath on Extension.extension: @value|f:*|h:div)
• ext-1: On Extension.extension: Must have either extensions or value[x], not both (xpath on Extension.extension: exists(f:extension)!=exists(f:*[starts-with(local-name(.), "value")]))
• ele-1: On Extension.extension.extension: All FHIR elements must have a @value or children (xpath on Extension.extension.extension: @value|f:*|h:div)
• ext-1: On Extension.extension.extension: Must have either extensions or value[x], not both (xpath on Extension.extension.extension: exists(f:extension)!=exists(f:*[starts-with(local-name(.), "value")]))
• ele-1: On Extension.extension.value[x]: All FHIR elements must have a @value or children (xpath on Extension.extension.value[x]: @value|f:*|h:div)
• ele-1: On Extension.value[x]: All FHIR elements must have a @value or children (xpath on Extension.value[x]: @value|f:*|h:div)