<Dl> <Dd> δ m (φ) = M (φ) δ φ = a (1 − e 2) (1 − e 2 sin 2 ⁡ φ) − 3 2 δ φ (\ displaystyle \ delta m (\ phi) = M (\ phi) \, \ delta \ phi = a (1 - e ^ (2)) \ left (1 - e ^ (2) \ sin ^ (2) \ phi \ right) ^ (- (\ frac (3) (2))) \, \ delta \ phi) </Dd> </Dl> <Dd> δ m (φ) = M (φ) δ φ = a (1 − e 2) (1 − e 2 sin 2 ⁡ φ) − 3 2 δ φ (\ displaystyle \ delta m (\ phi) = M (\ phi) \, \ delta \ phi = a (1 - e ^ (2)) \ left (1 - e ^ (2) \ sin ^ (2) \ phi \ right) ^ (- (\ frac (3) (2))) \, \ delta \ phi) </Dd> <Table> <Tr> <Th> φ (\ displaystyle \ phi) </Th> <Th> Δ </Th> <Th> Δ </Th> </Tr> <Tr> <Td> 0 ° </Td> <Td> 110.574 km </Td> <Td> 111.320 km </Td> </Tr> <Tr> <Td> 15 ° </Td> <Td> 110.649 km </Td> <Td> 107.550 km </Td> </Tr> <Tr> <Td> 30 ° </Td> <Td> 110.852 km </Td> <Td> 96.486 km </Td> </Tr> <Tr> <Td> 45 ° </Td> <Td> 111.132 km </Td> <Td> 78.847 km </Td> </Tr> <Tr> <Td> 60 ° </Td> <Td> 111.412 km </Td> <Td> 55.800 km </Td> </Tr> <Tr> <Td> 75 ° </Td> <Td> 111.618 km </Td> <Td> 28.902 km </Td> </Tr> <Tr> <Td> 90 ° </Td> <Td> 111.694 km </Td> <Td> 0.000 km </Td> </Tr> </Table> <Tr> <Th> φ (\ displaystyle \ phi) </Th> <Th> Δ </Th> <Th> Δ </Th> </Tr>

At the equator one degree of latitude is equal to