CMMagnetometerData
E494403
CMMagnetometerData is an iOS Core Motion framework class that encapsulates raw magnetometer measurements and related metadata from a device’s motion sensors.
All labels observed (1)
| Label | Occurrences |
|---|---|
| CMMagnetometerData canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T5100961 — 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: CMMagnetometerData Context triple: [CoreMotion, APIClass, CMMagnetometerData]
-
A.
Fluxgate Magnetometer
A fluxgate magnetometer is a highly sensitive scientific instrument used to measure the strength and direction of magnetic fields, commonly employed on spacecraft and in geophysical surveys.
-
B.
TMAG
TMAG is a major cultural institution in Hobart, Tasmania, combining a museum, art gallery, and herbarium that showcases the region’s natural and cultural heritage.
-
C.
Magnetes
Magnetes were an ancient Greek tribe from the region of Magnesia in Thessaly, known from myth and history as participants in wider Hellenic religious and political affairs.
-
D.
Magnet
Magnet is a Norwegian musician and singer-songwriter known for his atmospheric, melodic indie and folk-influenced music.
-
E.
CMAG
CMAG is the abbreviated name for the Commonwealth Ministerial Action Group, a body of foreign ministers that addresses serious or persistent violations of Commonwealth political values by member states.
- 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: CMMagnetometerData Target entity description: CMMagnetometerData is an iOS Core Motion framework class that encapsulates raw magnetometer measurements and related metadata from a device’s motion sensors.
-
A.
Fluxgate Magnetometer
A fluxgate magnetometer is a highly sensitive scientific instrument used to measure the strength and direction of magnetic fields, commonly employed on spacecraft and in geophysical surveys.
-
B.
TMAG
TMAG is a major cultural institution in Hobart, Tasmania, combining a museum, art gallery, and herbarium that showcases the region’s natural and cultural heritage.
-
C.
Magnetes
Magnetes were an ancient Greek tribe from the region of Magnesia in Thessaly, known from myth and history as participants in wider Hellenic religious and political affairs.
-
D.
Magnet
Magnet is a Norwegian musician and singer-songwriter known for his atmospheric, melodic indie and folk-influenced music.
-
E.
CMAG
CMAG is the abbreviated name for the Commonwealth Ministerial Action Group, a body of foreign ministers that addresses serious or persistent violations of Commonwealth political values by member states.
- F. None of above. chosen
Statements (41)
| Predicate | Object |
|---|---|
| instanceOf |
Class
ⓘ
Core Motion class ⓘ |
| accessPattern | read-only properties ⓘ |
| availability | requires hardware with magnetometer sensor ⓘ |
| category |
motion sensing
ⓘ
sensor data ⓘ |
| conformsTo | NSCopying NERFINISHED ⓘ |
| dataSource | device magnetometer ⓘ |
| definedInFramework | CoreMotion.framework NERFINISHED ⓘ |
| documentationURL | https://developer.apple.com/documentation/coremotion/cmmagnetometerdata ⓘ |
| hasComponent |
magneticField.x
ⓘ
magneticField.y ⓘ magneticField.z ⓘ |
| hasProperty |
accuracy
ⓘ
magneticField ⓘ sensorLocation ⓘ timestamp ⓘ |
| hasType | CMMagneticField for magneticField property ⓘ |
| inheritsFrom | NSObject NERFINISHED ⓘ |
| introducedBy | Apple Core Motion API NERFINISHED ⓘ |
| isImmutable | true ⓘ |
| language |
Objective-C
NERFINISHED
ⓘ
Swift NERFINISHED ⓘ |
| metadataIncludes |
measurement accuracy
ⓘ
sensor location information ⓘ timestamp ⓘ |
| namespace | Core Motion NERFINISHED ⓘ |
| platform |
iOS
ⓘ
iPadOS ⓘ tvOS NERFINISHED ⓘ watchOS NERFINISHED ⓘ |
| provides |
magnetic field data
ⓘ
raw magnetometer measurements ⓘ |
| purpose |
access raw magnetic field values from device sensors
ⓘ
support sensor fusion and motion processing ⓘ |
| threading | typically delivered on NSOperationQueue callbacks ⓘ |
| unitOfMeasure | microteslas for magneticField components ⓘ |
| usedWith |
CMMotionManager
NERFINISHED
ⓘ
magnetometerData property of CMMotionManager ⓘ startMagnetometerUpdates ⓘ startMagnetometerUpdatesToQueue:withHandler: ⓘ |
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: CMMagnetometerData Description of subject: CMMagnetometerData is an iOS Core Motion framework class that encapsulates raw magnetometer measurements and related metadata from a device’s motion sensors.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.