Lambert azimuthal equal-area projection
E279123
The Lambert azimuthal equal-area projection is a map projection that preserves area while representing the Earth on a circular, azimuthally symmetric plane, commonly used for mapping continents and polar regions.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Lambert azimuthal equal-area projection canonical | 1 |
| Lambert projections | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T2566434 — 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: Lambert azimuthal equal-area projection Context triple: [Johann Heinrich Lambert, knownFor, Lambert azimuthal equal-area projection]
-
A.
Gauss map
The Gauss map is a differential geometry concept that assigns to each point on a surface the corresponding point on the unit sphere determined by the surface’s normal vector at that point.
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B.
WGS84
WGS84 is the global geodetic reference system and standard coordinate framework used for GPS and most modern mapping applications.
-
C.
The Naked Earth
The Naked Earth is a 1958 British drama film set in colonial Africa, starring Sydney Chaplin and directed by Vincent Sherman.
-
D.
Mapam
Mapam was a left-wing socialist Zionist political party in Israel that played a significant role in the early decades of the state, particularly within the kibbutz movement and peace-oriented politics.
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E.
Humboldt meridian
The Humboldt meridian is a principal survey meridian used as a reference line for land surveying and mapping in parts of northern California.
- 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: Lambert azimuthal equal-area projection Target entity description: The Lambert azimuthal equal-area projection is a map projection that preserves area while representing the Earth on a circular, azimuthally symmetric plane, commonly used for mapping continents and polar regions.
-
A.
Gauss map
The Gauss map is a differential geometry concept that assigns to each point on a surface the corresponding point on the unit sphere determined by the surface’s normal vector at that point.
-
B.
WGS84
WGS84 is the global geodetic reference system and standard coordinate framework used for GPS and most modern mapping applications.
-
C.
The Naked Earth
The Naked Earth is a 1958 British drama film set in colonial Africa, starring Sydney Chaplin and directed by Vincent Sherman.
-
D.
Mapam
Mapam was a left-wing socialist Zionist political party in Israel that played a significant role in the early decades of the state, particularly within the kibbutz movement and peace-oriented politics.
-
E.
Humboldt meridian
The Humboldt meridian is a principal survey meridian used as a reference line for land surveying and mapping in parts of northern California.
- F. None of above. chosen
Statements (46)
| Predicate | Object |
|---|---|
| instanceOf |
azimuthal map projection
ⓘ
equal-area projection ⓘ map projection ⓘ |
| advantage |
accurate comparison of areas
ⓘ
suitable for statistical mapping ⓘ |
| canBeDefinedOn |
ellipsoid
ⓘ
sphere ⓘ |
| centerOption |
North Pole
ⓘ
South Pole ⓘ any chosen point on Earth ⓘ |
| commonlyUsedBy |
international organizations
ⓘ
national mapping agencies ⓘ |
| coordinateSystem | spherical coordinates ⓘ |
| disadvantage |
increasing shape distortion toward map edge
ⓘ
not conformal ⓘ |
| distortionCharacteristic |
distorts scale away from center
ⓘ
distorts shape away from center ⓘ |
| doesNotPreserve |
angles
ⓘ
distances except from center ⓘ true shapes ⓘ |
| introducedBy | Johann Heinrich Lambert ⓘ |
| introducedInCentury | 18th century ⓘ |
| ISOStandardUsage | used in some ISO-based spatial reference systems ⓘ |
| mapEdgeShape | circle when centered on a point ⓘ |
| mathematicalBasis | trigonometric transformation from sphere to plane ⓘ |
| namedAfter | Johann Heinrich Lambert ⓘ |
| preserves | relative area of regions ⓘ |
| projectionFamily |
Lambert projections
ⓘ
linked to:
Lambert azimuthal equal-area projection
|
| projectionSurface | plane ⓘ |
| projectionType | azimuthal ⓘ |
| propertyPreserved | area ⓘ |
| relatedTo |
Lambert conformal conic projection
ⓘ
Lambert cylindrical equal-area projection ⓘ |
| suitableFor |
climate maps
ⓘ
global distributions ⓘ mapping continents ⓘ mapping polar regions ⓘ population density maps ⓘ thematic maps ⓘ |
| symmetry | azimuthally symmetric ⓘ |
| typicalMapShape | circle ⓘ |
| usageDomain |
cartography
ⓘ
geographic information systems ⓘ thematic cartography ⓘ |
| usedFor |
global equal-area maps
ⓘ
regional equal-area maps ⓘ |
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: Lambert azimuthal equal-area projection Description of subject: The Lambert azimuthal equal-area projection is a map projection that preserves area while representing the Earth on a circular, azimuthally symmetric plane, commonly used for mapping continents and polar regions.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: Lambert azimuthal equal-area projection