CanonicalLocal tangent space Euclidean SRF

Given any SRF based on an oblate ellipsoid ORM (or sphere ORM),

and a point (?o, ?o) on the ellipsoid, the CanonicalLocal tangent space Euclidean (CLTSE) SRF at (? o, ? o) is the

Local tangent space Euclidean SRF with parameters:

? = ?o

? = ?o

? = 0

h0 = 0

uF = vF = 0

CLTSE SRFs are useful for defining a vector direction in

an SRF with a curvilinear CS.

CLTSE SRFs also useful in instancing an abstract model at a point in an SRF. (E.g.: SEDRIS DRM Geometry/Feature Model Instance.)

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