SLOPE = VERTICAL DISTANCE/HORIZONTAL DISTANCE X 100
= RISE/RUN X 100 =%
LINEAR UNIT MEASUREMENTS
12 inches = 1 foot
3 feet = 1 yard
5280 feet = 1 mile
66 feet = 1 chain
80 chains = 1 mile
AREA UNIT MEASUREMENTS
1 acre = 208 feet x 208 feet
1 acre = 43560 sq feet
1 acre = 10 sq chains
640 acres = 1 sq mile
1 section = 1 sq mile
1/2 section = 320 acres
1/4 section = 160 acres
1 hectare = 2.4 acres
GEOGRAPHIC LOCATION SYSTEMS CONVERSIONS
60 seconds (60") = 1 minute (1')
60 minutes (60') = 1 degree (1°)
7.5 minutes = 1/8 of 60 minutes = 1/8 of a degree
Degrees minutes seconds to degrees decimal minutes:
48°20'30" to 48°20.5'
Degrees decimal minutes to degrees minutes seconds:
48°20.5' to 48°20'30"
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