raster_enums: Raster resample, pixel, comression types
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resample, pixel, comression types

R Documentation

Raster resample, pixel, comression types

The following table shows the pixel_type value and the range of values stored for different bit depths:

Pixel type	Bit depth	Range of values that each cell can contain
`"U1"`	1 bit	0 to 1
`"U2"`	2 bits	0 to 3
`"U4"`	4 bits	0 to 15
`"U8"`	Unsigned 8 bit integers	0 to 255
`"S8"`	8 bit integers	-128 to 128
`"U16"`	Unsigned 16 bit integers	0 to 65535
`"S16"`	16 bit integers	-32768 to 32767
`"U32"`	Unsigned 32 bit integers	0 to 4294967295
`"S32"`	32 bit integers	-2147483648 to 2147483647
`"F32"`	32 bit Single precision floating point	-3.402823466e+38 to 3.402823466e+38
`"F64"`	64 bit Double precision floating point	0 to 18446744073709551616

The following table shows the resamp_type value:

Resample type	Definition
`"NearestNeighbor"`	- Performs a nearest neighbor assignment and is the fastest of the interpolation methods. This is the default.
`"BilinearInterpolation"`	- Performs a bilinear interpolation and determines the new value of a cell based on a weighted distance average of the four nearest input cell centers.
`"CubicConvolution"`	- Performs a cubic convolution and determines the new value of a cell based on fitting a smooth curve through the 16 nearest input cell centers.
`"Majority"`	- Performs a majority algorithm and determines the new value of the cell based on the most popular values within the filter window.
`"BilinearInterpolationPlus"`	TODO
`"BilinearGaussBlur"`	TODO
`"BilinearGaussBlurPlus"`	TODO
`"Average"`	TODO
`"Minimum"`	TODO
`"Average"`	TODO
`"VectorAverage"`	TODO

Note The Bilinear and Cubic options should not be used with categorical data, since the cell values may be altered.

The following table shows the compression_type value:

Compression type	Lossy or lossless	Notes
`"LZ77"`	Lossless
`"JPEG"`	Lossy	Can define a compression quality
`"JPEG 2000"`	Lossy or lossless	Can define a compression quality
`"PackBits"`	Lossless	Applies to TIFF only
`"LZW"`	Lossless
`"RLE"`	Lossless
`"CCITT GROUP 3"`	Lossless	Applies to TIFF only
`"CCITT GROUP 4"`	Lossless	Applies to TIFF only
`"CCITT (1D)"`	Lossless	Applies to TIFF only
`"None"`	No data compression