https://albertalandsurveyhistory.ca/evolution-of-land-survey-technology/34-measuring-by-speed-of-light-the-geodimeter/
34. Measuring by Speed of Light - The Geodimeter - Alberta Geomatics Historical Society
Aug 17, 2025 - The Geodimeter applied the speed of light to measure distances.
speed of lighthistorical societymeasuringgeodimeteralberta