van nostkand's engineekhstg magazine. 116 ence of an ellipse whose semi-major axis ellipse that we shall need most particu- is a and eccentricity e, these radii are larly to use are the length of the quad- rant and of the radius of curvature at a(l-e2) any point. These are deduced in mathe- 1… … meridian ellipse, the radius of curvature Equating these values gives the two of the curve at that point is following conditions: r,(l-e2) 57.29578 ~ A/(l-e9sin9Q"' 9 1 V(l-e2sm\)s For the equator, where 1—0°, this has a(l-e2) Til 57.29578 2 9, A/(l-e2sin72)3 its least value — , but for the poles…
Engineering
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