FC is localized by composing FC with the  localization operator. The localized CS is of the same CS type (CS type 3D or CS type 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.
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.
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, and 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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