Above chart is an indispensable visualization tool which will help to illustrate the 'real-world' differences between high and low precision equipments . Being able to understand the inherent errors contained in any particular shot is important . A Level or Theodolite or Total Station's optical tolerance is a critical consideration for machine alignment projects .
This second chart is a rare and very interesting exercise in real-world visualization . It may also provide a useful tool for machine alignments , in the case of that rare time a blueprint provide's a particular angle measurements only .