To find the scale ratio, you can express the relationship between the map distance and the ground distance. In this case:
1 ft (map) corresponds to 100 m (ground).
To express this as a scale ratio, you can set it up as a fraction:
Scale Ratio = (Map Distance / Ground Distance)
Scale Ratio = (1 ft / 100 m)
Now, you can simplify this ratio:
Scale Ratio = (1/100) ft/m
So, the scale ratio is 1:100, which means that every 1 unit on the map represents 100 units on the ground.