Scale
|
The scale of the road maps has been estimated by measuring the
segments of road from mile spot to mile spot. Mile intervals
were measured on two plates. Only straight segments of road
were meassured.
The strip map scale, assuming a modern statute mile, is about:-
1 to 160000
2.5 miles to 1 inch
The measurements made are listed below, mm per mile segment.
pl.25 pl.30
9.0 23.0 (2)
27.3 (3) 11.0
19.6 (2) 12.6
16.9 (2) 11.8
9.8 12.9
27.7 (3) 13.1
18.0 (2) 14.0
27.5 (3) 11.0
9.1 23.5 (2)
9.1 22.9 (2)
18.1 (2) 12.6
8.9 11.0
8.9 24.1 (2)
9.1 13.0
18.1 (2) 11.6
26 miles=237.1mm 19 miles=228.1mm
scale 1 to 176478 scale 1 to 112886
2.8 miles to 1 inch 1.8 miles to 1 inch
The two sheets are significantly different scales.
The average, taking the two sheets together is
45 miles=465.2mm
thus:-
1 to 155676
|