Statements (19)
| Predicate | Object |
|---|---|
| gptkbp:instanceOf |
scientific instrument
|
| gptkbp:alsoKnownAs |
gptkb:Jacob's_staff
|
| gptkbp:category |
scientific instrument
|
| gptkbp:hasPart |
main staff
sliding crosspiece |
| https://www.w3.org/2000/01/rdf-schema#label |
cross-staff
|
| gptkbp:inventedBy |
14th century
|
| gptkbp:length |
typically 60-100 cm
|
| gptkbp:material |
wood
|
| gptkbp:originatedIn |
gptkb:Europe
|
| gptkbp:replacedBy |
sextant
|
| gptkbp:usedBy |
astronomer
navigators |
| gptkbp:usedFor |
determining latitude
measuring angles measuring altitude of celestial bodies |
| gptkbp:bfsParent |
gptkb:Jacob's_staff
gptkb:backstaff |
| gptkbp:bfsLayer |
7
|