According to the DLG (p. 3), Pern has a diameter of approx. 6500 miles. Earth's diameter is 7900 miles, telling me that Pern is 17.73% smaller than Earth. In applying this formula, I've come up with Perns approx. circumference and diameter at both the equator and at the poles, as well as the number of miles per degree in both latitude and longitude. The numbers are as follows:

EARTH:

Diameter-
-equator = 7,927 miles
-poles = 7,900 miles
Circumference-
-equator = 24,902 miles
-poles = 24, 860 miles

Giving Earth approx. 69.05 miles per degree of latitude & 69.17 miles per degree of longitude at the equator.

PERN:

Diameter-
-equator = 6,522 miles
-poles = 6,500 miles
Circumference-
-equator = 20,487 miles
-poles = 20,452 miles

Giving Pern approx. 56.81 miles per degree of latitude & 56.90 miles per degree of longitude at the equator.

The only argument with this fact from the books is the Atlas, which has mileage scales on its maps that translate to approx. 8 miles per degree. Personally, I think that is absurd since that scale would give Pern a circumference of only 2,880 miles (meaning the trip from New York to Los Angeles would be greater than a round-trip of Pern). So I based my numbers off the DLG - the best source I've found for such numbers. My Earth numbers came from various sources, one being an online textbook.

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