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hardconvergency

The formula for convergency between two meridians is:

Q: The formula for convergency between two meridians is:

Change of longitude × sin(latitude). Convergency = change of longitude × sin(mean latitude). At the equator (sin 0 = 0) convergency is zero; at the poles (sin 90 = 1) it equals the change of longitude.

Change of longitude × cos(latitude)

Change of latitude × cos(longitude)

Change of latitude × sin(longitude)

Change of longitude × sin(latitude)

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