1) How many kilometers are spanned by an arc of 0.5° latitude (Dj = 1°) along the DateLine?
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1) How many kilometers are spanned by an arc of 0.5° latitude (Dj = 1°) along the DateLine?
2) At what latitude is the zonal distance spanned by an arc of 1° longitude (Dl = 1°) exactly half as long as the equivalent meridional distance spanned by an arc of 1° latitude (Dj =1°)?
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