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Changes between Version 27 and Version 28 of GridTopologies

v27	v28
8	8	We will assume that warped grid will be described via `ReferenceableGridByArray`, although an alternative description via origin, offset vectors and matrices of coefficients is also possible.
9	9	In case of mixed rectilinear/curvilinear geometries, a non-standard so-called `ReferenceableGridByArrayAndVectors` type ![1] will be used, for a more compact and convenient GML description. Coefficients in a `ReferenceableGridByVector` are also kept optional, to allow mixing of regularly and irregularly spaced axis in a same geometry (see again ![1]).
	10
	11	It should be noted that in some examples the type of the geometry gets ''simplified'' from a referenceable to a rectified grid (e.g. see [#a2a-ITS case 2a-ITS]). This might happen that trimming or slicing would extract a part of the whole grid with simpler geometry indeed (think of a time slice in an irregular time series of regularly gridded images). Geometry simplification is not mandatory however, nor it is prescribed by WCS standard. A regular grid can always we described via a !ReferenceableGridBy* GML type.
10	12
11	13	When determining which CRS type should be bound to a certain coverage, the term `SpatialCRS` will mean any Earth or Planetary (or Image) related CRS, like `VerticalCRS`, `GeographicCRS`, `ProjectedCRS`, etc. See GML 3.2.1 (OGC 07-036) for more info on the available CRS types.