NAME¶

pkreclass - replace pixel values in raster image

SYNOPSIS¶

pkreclass
-i input [ -c from -r to ] -o output [options]

DESCRIPTION¶

pkreclass is a program to replace pixel values in raster images.

OPTIONS¶

-i filename, --input filename

Input image

-m mask, --mask mask

Mask image(s)

-msknodata value, --msknodata value

Mask value(s) where image has nodata. Use one value for each mask, or multiple values for a single mask.

-nodata value, --nodata value

nodata value to put in image if not valid (0)

-code filename, --code filename

Recode text file (2 colums: from to)

-c classes, --class classes

list of classes to reclass (in combination with reclass option)

-r classes, --reclass classes

list of recoded classes (in combination with class option)

-ct filename, --ct filename

color table (file with 5 columns: id R G B ALFA (0: transparent, 255: solid))

-o filename, --output filename

Output mask file

-ot type, --otype type

Data type for output image ({Byte / Int16 / UInt16 / UInt32 / Int32 / Float32 / Float64 / CInt16 / CInt32 / CFloat32 / CFloat64}). Empty string: inherit type from input image

-of format, --oformat format

Output image format (see also gdal_translate(1)).

-b band, --band band

band index(es) to replace (other bands are copied to output)

-n name, --fname name

field name of the shape file to be replaced default: label

-co option, --co option

Creation option for output file. Multiple options can be specified.

-d description, --description description

Set image description

-v level, --band band

Band index(es) to extract. Leave empty to use all bands

-v level, --verbose level

Verbose mode if > 0

EXAMPLE¶

pkreclass -i input1.tif -o output.tif -c 1 -r 0 -c 2 -r 0
      

replace pixel values 1 and 2 with value 0

pkreclass -i vector.shp -o output.shp -c FROM -r TO -n INFIELD
      

replace FROM with TO in field INFIELD (of type string) in vector file vector.shp and write to new vector output.shp

for((i=0;i<256;++i));do if(($i<100));then echo "$i 1";else echo "$i 0";fi;done >  code.txt; pkreclass -i input1.tif -o output.tif --code code.txt
      

replace all values smaller than 100 with 1, all other values with 0

pkreclass -i input1.tif -o output.tif $(for((i=0;i<256;++i));do if(($i<100));then echo -n " -c $i " " -r 1";else echo " -c $i " " -r 0";fi;done)
      

same as previous but without temporary file