CMAltimeter
E494401
CMAltimeter is an iOS Core Motion class that provides access to barometric altimeter data, allowing apps to track relative altitude changes using the device’s pressure sensor.
All labels observed (1)
| Label | Occurrences |
|---|---|
| CMAltimeter canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T5100956 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: CMAltimeter Context triple: [CoreMotion, APIClass, CMAltimeter]
-
A.
EASy flight deck
EASy flight deck is Dassault Aviation’s advanced integrated avionics system designed to enhance situational awareness, automation, and pilot workload management in business jets like the Falcon 7X.
-
B.
Ramport Aero
Ramport Aero is the company responsible for managing and operating Zhukovsky International Airport near Moscow, Russia.
-
C.
A Method of Reaching Extreme Altitudes
A Method of Reaching Extreme Altitudes is a pioneering 1919 technical report by Robert H. Goddard that laid the theoretical foundations for modern rocketry and spaceflight.
-
D.
Honeywell Primus 1000
The Honeywell Primus 1000 is an integrated glass cockpit avionics suite widely used in regional and business aircraft, providing advanced flight management, navigation, and display capabilities.
-
E.
Altior
Altior is a celebrated British National Hunt racehorse renowned for his exceptional unbeaten streak over fences and multiple Grade 1 victories.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: CMAltimeter Target entity description: CMAltimeter is an iOS Core Motion class that provides access to barometric altimeter data, allowing apps to track relative altitude changes using the device’s pressure sensor.
-
A.
EASy flight deck
EASy flight deck is Dassault Aviation’s advanced integrated avionics system designed to enhance situational awareness, automation, and pilot workload management in business jets like the Falcon 7X.
-
B.
Ramport Aero
Ramport Aero is the company responsible for managing and operating Zhukovsky International Airport near Moscow, Russia.
-
C.
A Method of Reaching Extreme Altitudes
A Method of Reaching Extreme Altitudes is a pioneering 1919 technical report by Robert H. Goddard that laid the theoretical foundations for modern rocketry and spaceflight.
-
D.
Honeywell Primus 1000
The Honeywell Primus 1000 is an integrated glass cockpit avionics suite widely used in regional and business aircraft, providing advanced flight management, navigation, and display capabilities.
-
E.
Altior
Altior is a celebrated British National Hunt racehorse renowned for his exceptional unbeaten streak over fences and multiple Grade 1 victories.
- F. None of above. chosen
Statements (40)
| Predicate | Object |
|---|---|
| instanceOf |
Core Motion class
ⓘ
barometric altimeter API ⓘ iOS framework class ⓘ |
| category |
motion data API
ⓘ
sensors API ⓘ |
| conformsTo | NSObject ⓘ |
| dataUnit |
kilopascals for pressure
ⓘ
meters for relative altitude ⓘ |
| developedBy | Apple Inc. ⓘ |
| documentationURL | https://developer.apple.com/documentation/coremotion/cmaltimeter ⓘ |
| frameworkImport | import CoreMotion ⓘ |
| hasMethod |
authorizationStatus()
ⓘ
isRelativeAltitudeAvailable() ⓘ startRelativeAltitudeUpdates(to:withHandler:) ⓘ stopRelativeAltitudeUpdates() ⓘ |
| hasProperty | isRelativeAltitudeAvailable ⓘ |
| introducedIn |
iOS 8
ⓘ
watchOS 2 ⓘ
linked to:
watchOS
|
| languageSupport |
Objective-C
ⓘ
Swift ⓘ |
| partOf |
Core Motion framework
ⓘ
linked to:
CoreMotion
|
| platform |
iOS
ⓘ
watchOS ⓘ |
| provides |
barometric altimeter data
ⓘ
pressure data ⓘ relative altitude data ⓘ |
| requires |
barometer-capable device
ⓘ
user motion & fitness authorization ⓘ |
| returnsDataType | CMAltitudeData ⓘ |
| securityDomain | Health and motion data privacy ⓘ |
| supportsFeature |
background altimeter updates
ⓘ
continuous altitude updates ⓘ relative altitude tracking ⓘ |
| threadingModel | delivers updates on specified OperationQueue ⓘ |
| usedFor |
altitude-based game mechanics
ⓘ
fitness tracking apps ⓘ hiking and elevation tracking apps ⓘ stair climbing detection ⓘ |
| usesSensor |
barometer
ⓘ
pressure sensor ⓘ |
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: CMAltimeter Description of subject: CMAltimeter is an iOS Core Motion class that provides access to barometric altimeter data, allowing apps to track relative altitude changes using the device’s pressure sensor.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.