In 1600 the surveyors Johan Sems (1572-before 1656) from Leeuwarden and Jan Pietersz Dou (1572-1635) from Leiden published theirĀ Practijck des lantmetensĀ (The Practice of Surveying). From 1612 on it w…
Illustration from the book Practijck des landmeten by Jan Pietersz.Ā Dou and Johan Sems (1600).Ā The image uses quadrants with which an angle of up to 90 degrees could be measured.Ā To remove this limita…
Land surveying is of course one of the oldest professions known to man. Needless to say, there are professional surveying companies and associations across the globe, which we should allā¦