Gemma Frisius
E1012595
Gemma Frisius was a 16th-century Dutch mathematician, cartographer, and instrument maker known for his pioneering work in triangulation and contributions to early modern geography.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Gemma Frisius canonical | 3 |
How this entity was disambiguated
This entity first appeared as the object of triple T12984485 — 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: Gemma Frisius Context triple: [Gerard de Kremer, studiedUnder, Gemma Frisius]
-
A.
Willebrord Snellius
Willebrord Snellius was a Dutch mathematician and astronomer best known for formulating the law that describes how light bends when passing between different media.
-
B.
Cornelis Janssens van Ceulen
Cornelis Janssens van Ceulen was a Dutch Golden Age portrait painter renowned for his elegant, detailed likenesses of English and Dutch sitters.
-
C.
Hans Vredeman de Vries
Hans Vredeman de Vries was a Dutch Renaissance architect, painter, and influential designer whose treatises on perspective and ornament profoundly shaped Northern European art and architecture.
-
D.
Georg Joachim Rheticus
Georg Joachim Rheticus was a 16th-century mathematician and astronomer best known for being a key disciple of Nicolaus Copernicus and for helping to introduce and defend the heliocentric model of the cosmos.
-
E.
Regiomontanus
Regiomontanus was a 15th-century German mathematician and astronomer whose advanced astronomical tables and theoretical work significantly shaped the development of Renaissance astronomy and influenced later figures like Copernicus.
- 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: Gemma Frisius Target entity description: Gemma Frisius was a 16th-century Dutch mathematician, cartographer, and instrument maker known for his pioneering work in triangulation and contributions to early modern geography.
-
A.
Willebrord Snellius
Willebrord Snellius was a Dutch mathematician and astronomer best known for formulating the law that describes how light bends when passing between different media.
-
B.
Cornelis Janssens van Ceulen
Cornelis Janssens van Ceulen was a Dutch Golden Age portrait painter renowned for his elegant, detailed likenesses of English and Dutch sitters.
-
C.
Hans Vredeman de Vries
Hans Vredeman de Vries was a Dutch Renaissance architect, painter, and influential designer whose treatises on perspective and ornament profoundly shaped Northern European art and architecture.
-
D.
Georg Joachim Rheticus
Georg Joachim Rheticus was a 16th-century mathematician and astronomer best known for being a key disciple of Nicolaus Copernicus and for helping to introduce and defend the heliocentric model of the cosmos.
-
E.
Regiomontanus
Regiomontanus was a 15th-century German mathematician and astronomer whose advanced astronomical tables and theoretical work significantly shaped the development of Renaissance astronomy and influenced later figures like Copernicus.
- F. None of above. chosen
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
academic
ⓘ
astronomer ⓘ cartographer ⓘ human ⓘ instrument maker ⓘ mathematician ⓘ physician ⓘ |
| academicDegree | Doctor of Medicine ⓘ |
| birthDate | 1508-12-09 ⓘ |
| birthName | Jemme Reinerszoon NERFINISHED ⓘ |
| birthPlace |
Dokkum
NERFINISHED
ⓘ
Friesland NERFINISHED ⓘ Habsburg Netherlands NERFINISHED ⓘ |
| collaboratedWith |
Gaspar Myrica
NERFINISHED
ⓘ
Gerardus Mercator NERFINISHED ⓘ |
| countryOfCitizenship | Habsburg Netherlands NERFINISHED ⓘ |
| deathDate | 1555-05-25 ⓘ |
| deathPlace |
Duchy of Brabant
NERFINISHED
ⓘ
Leuven NERFINISHED ⓘ |
| educatedAt | University of Leuven NERFINISHED ⓘ |
| employer | University of Leuven NERFINISHED ⓘ |
| era |
16th century
ⓘ
Renaissance ⓘ |
| ethnicGroup | Dutch ⓘ |
| fieldOfWork |
astronomy
ⓘ
cartography ⓘ geography ⓘ instrument making ⓘ mathematics ⓘ |
| hasNotableStudent | Gerardus Mercator NERFINISHED ⓘ |
| influenced |
Abraham Ortelius
NERFINISHED
ⓘ
Gerardus Mercator NERFINISHED ⓘ cartography in the Low Countries ⓘ |
| knownFor |
contributions to early modern cartography
ⓘ
design of scientific instruments ⓘ development of triangulation in surveying ⓘ improvements to globes and maps ⓘ proposal of longitude determination using accurate clocks ⓘ |
| languageOfWorkOrName |
Dutch
ⓘ
Latin NERFINISHED ⓘ |
| name | Gemma Frisius NERFINISHED ⓘ |
| notableWork |
De principiis astronomiae et cosmographiae
NERFINISHED
ⓘ
De radio astronomico et geometrico NERFINISHED ⓘ Libellus de locorum describendorum ratione NERFINISHED ⓘ |
| occupation | professor at the University of Leuven ⓘ |
| studentOf | Johannes Dantiscus NERFINISHED ⓘ |
| taught | Gerardus Mercator NERFINISHED ⓘ |
| workLocation | Leuven NERFINISHED ⓘ |
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: Gemma Frisius Description of subject: Gemma Frisius was a 16th-century Dutch mathematician, cartographer, and instrument maker known for his pioneering work in triangulation and contributions to early modern geography.
Referenced by (3)
Full triples — surface form annotated when it differs from this entity's canonical label.