11 pages matching offsets in this book
Results 1-3 of 11
What people are saying - Write a review
We haven't found any reviews in the usual places.
adjustment alidade angle of 30 back reading bearing Bisect chain line circle construct contour convenient curved describe an arc describe arcs diagonal scale diaphragm distance divided draw a line draw lines drawn Dumpy level edge error eye-piece feet field-book figure fixed flag foot foot-screws fore reading ground height hence horizontal plane inches inches long instrument intersection length Let A B line A B line of collimation line parallel magnetic magnetic bearing measured meridian method necessary needle object glass obtained offsets paper parallax parallelogram pencil perpendicular perspective projection picture plane placed plane-table plotted position primary scale prism prismatic compass protractor radius describe rays rectangle reduced level regular polygon represent rhombus right angles screws sides sight-vane spirit level square staff station straight line surface survey surveyor telescope tion triangle Vernier scale vertical plane XY line