10.7.2, replace the 2nd sentence with:

" If ( λ1, φ1) and ( λ2, φ2) are the surface celestiodetic coordinates of two points lying on the oblate ellipsoid, dG (( λ1, φ1), (λ2, φ2)) denotes the geodesic distance between the points. On a sphere, the value of dG (( λ1, φ1), (λ2, φ2)) may be computed using the methods of spherical trigonometry. However, in the general case of an oblate ellipsoid, closed form solutions typically involve elliptic integrals that usually require numerical approximation. Solutions may also be approximated using a variety of techniques including iterative algorithms and/or numerical methods for systems of differential equations (see [RAPP2]). "

 

10.7.2, NOTE, change the 1st sentence to read:

" The development of approximation equations for dG has been the subject of much research. "

 

Bibliography, remove the entry for Identifier "PEAR".

 

I.6, change equations for dp, ds, and E to the more general forms:

dp = (RN + h)cos(φ)

ds = (RM + h)

formula or figure,

and remove the next to last sentence in the 6th paragraph, which begins: "For P and Pa sufficiently close together ...".

 

I.6, 5th paragraph (starting "For an ..."), 2nd sentence:

Change "arc length along a meridian through P" to read "arc length along a meridian at height h through P", and change "length of the parallel passing through P" to read "length of the parallel at height h passing through P".