Artefact gallery
Angular measurement instruments
A critical component to the surveying process is the measurement of angles. Initially compasses assisted surveyors to define their direction, putting the survey on a magnetic meridian. Theodolites were developed to allow more accurate measurement of angles both in the horizontal and vertical plane.
In this guide:
- Distance measurement instruments
- Drafting and mapping instruments
- Angular measurement instruments
- Heighting instruments
- Surveying accessories
- Astronomical observing instruments and timekeeping
- Artefact gallery
- Photographic equipment
- Calculations