Graphometer
Grafómetro
- Date
- c. 1597 · confidence low
- Place
- Paris, Île-de-France, France
- Credited to
- Philippe Danfrie l'ancien
- Field
- Knowledge & symbols
What it is
The graphometer is a surveying instrument formed by a semicircular limb graduated in 180 degrees with sights and a rotating alidade, used to measure horizontal angles in the field.
What it led to
- precision topography and surveying
- later angular instruments such as the theodolite
- more accurate cartography in the 17th and 18th centuries
- standardization of field angle measurement