Levelling Over short distances the horizontal line and level line coincide. For a distance of 100m the effect of the curvature is less than 1 mm.
{"Image DocumentName": "LevellingOver short distances the horizontal line and level line coincide. For a distance of 100m the effect of the curvature is less than 1 mm.", "Image ImageDescription": "The levelling device (called level) must be set up so, that the line of sight is perpendicular to the gravity vector (plumb line). -> the line of sight is horizontal.", "Image XResolution": "37", "Image YResolution": "37", "Image ResolutionUnit": "Pixels/Centimeter", "Image Software": "SlidePlayer", "Image YCbCrPositioning": "Centered"}