5 Coordinate systems 25



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FC is localized by composing FC with the localization operator. The localized CS is of the same CS type (3D or surface, respectively). Its generating function is and has the same CS domain as FC.

There are two localization operations for a 2D CS. One uses localization parameters in and produces a surface CS. The other uses localization parameters in and produces a 2D CS.

  1. A 2D CS with generating function FC is localized by composing F with the localization operator. The localized CS is a surface CS. Its generating function is and has the same CS domain as FC.

  2. A 2D CS with generating function FC is localized by composing F with the localization operator. The localized CS is a surface CS. Its generating function is and has the same CS domain as FC.

The localization operator parameter, q, shall be called the lococentre. A localized CS may be called a lococentric CS.

NOTE     CS localization preserves the following CS properties: linear/curvilinear, orthogonal, Cartesian, orthonormal.

The relationship between a CS type and its localized version(s) is summarized in Table 5.4.

Table 5.4 — Localized CS type relationships



CS type

Localization operator

Lococentric CS type

3D



3D

Surface



Surface

2D





2D


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