Scara 1:1.000.000 inseamna ca 1 cm de pe harta inseamna 1.000.000cm pe teren.
Deci 1cm pe harta inseamna 10.000m in teren sau 10km in teren.
Deci putem aplca regula de trei simpla astfel:
a)
1 cm----------------------10km
x cm----------------------60km
x=60/10=6cm
b)
La fel:
1 cm----------------------10km
x cm----------------------1400km
x=1400/10=140cm=1,4m
c)
1 cm----------------------10km
25cm----------------------x Km
x=25×10=250km