This dictionary specifies the standard values of interpolation types specified in the WCS 1.1 specification, based on ISO 19123 Geographic information - Schema for coverage geometry and functions. This dictionary also lists the standard values of null resistance specified in the WCS 1.1 specification. In addition, this dictionary specifies definition URNs in the "ogc" URN namespace for these interpolation types and null resistance values.
ISO 19123 specifies two-dimensional versions of the interpolation types, namely, bilinear, biquadratic, and bicubic. This dictionary has removed the two dimension restriction by deleting the prefix "bi" from the interpolation types. For example, when also interpolating in the elevation dimension of a 3D CRS, the 3D extensions of these interpolation types shall be used. Similarly, when interpolating in only one spatial dimension, the 1D simplifications of these interpolation types shall be used.
Interpolation methods standard values
Identifier of nearest neighbour interpolation defined in Annex C of ISO 19123.
nearest
urn:ogc:def:interpolation:OGC:1.0:nearest
Identifier of linear interpolation defined in Annex C of ISO 19123.
linear
urn:ogc:def:interpolation:OGC:1.0:linear
Identifier of quadratic interpolation defined in Annex C of ISO 19123.
quadratic
urn:ogc:def:interpolation:OGC:1.0:quadratic
Identifier of cubic interpolation defined in Annex C of ISO 19123.
cubic
urn:ogc:def:interpolation:OGC:1.0:cubic
Identifier that no interpolation is available; requests must be for locations that are among the original domain locations.
none
urn:ogc:def:interpolation:OGC:1.0:none
Identifier that nulls in the input grid(s) have no effect on the interpolated value; resampling uses only non-null valued cells.
full
urn:ogc:def:nullResistance:OGC:1.0:full
Identifier that interpolated value is Null if any one input value is Null.
zero
urn:ogc:def:nullResistance:OGC:1.0:zero
Identifier that interpolated value is Null if half or more of the input values are Null.
half
urn:ogc:def:nullResistance:OGC:1.0:half
Identifier that resampling treats nulls differently from any method described above.
other
urn:ogc:def:nullResistance:OGC:1.0:other