raster_enums: Raster resample, pixel, comression types

resample, pixel, comression typesR Documentation

Raster resample, pixel, comression types

Description

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

References

  1. ArcGIS Help: Pixel Types

See Also

arc.raster, arc.raster-class


R-ArcGIS/r-bridge documentation built on May 3, 2024, 9:47 a.m.