Defining a CanonicalLocal Tangent Plane SRF

• A local tangent plane is defined at the point p

• Orthogonal X-Y axes are defined at p, and the normal to the local surface is used to define the Z-axis

• The resulting rectangular system is called a Local Tangent Plane (LTP) coordinate system

• If the surface is an ORS, and the Y-axis is defined to point to true north (the pole), the resulting system is a Canonical LTP (CLTP) spatial reference frame

• A linear vector space can be associated with a CLTP

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