bucks,
When you do these charts, it is to a relative scale, the actual scale is not set per any criteria. In reality, most charts already are to a scale, (scale fit) because you pull the procedure from a cad system. It is a real pain to break the lines in a procedure for the chart...
Many of the charts for the RNP procedures in Canada begin from the STAR to TCH...all to scale.
This is actually to scale on the public: (except the breaks at BIXER and OOSK) and was to scale on the tailored plate.
This is to scale for the most part: