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NAME

g.compare.md5 - Checks if two GRASS GIS maps are identical.

KEYWORDS

general, map management, list

SYNOPSIS

g.compare.md5
g.compare.md5 --help
g.compare.md5 [-gct] ainput=name binput=string type=datatype[,datatype,...] [--help] [--verbose] [--quiet] [--ui]

Flags:

-g
Return output in shell script style (0 fail, 1 success)
-c
Does not consider the color table for raster
-t
Does not consider the topology for vector
--help
Print usage summary
--verbose
Verbose module output
--quiet
Quiet module output
--ui
Force launching GUI dialog

Parameters:

ainput=name [required]
Name of first map to check
binput=string [required]
Name of second map to check
type=datatype[,datatype,...] [required]
Data type(s)
Options: rast, vector
Default: rast

Table of contents

DESCRIPTION

g.compare.md5 is a module that checks if two GRASS maps are identical. It uses the MD5 cryptographic hash function. For vector map layers it does not check if the attribute table(s) are identical, too.

EXAMPLE

North Carolina example, with elevation map:
# copy a raster map
g.copy raster=elevation,dem

# now check and return TRUE
g.compare.md5 ainput=elevation binput=dem

# now change the color table
r.colors map=dem color=srtm

# check again and it should return FALSE
g.compare.md5 ainput=elevation binput=dem

# but when adding the -c flag (ignore color table), TRUE is returned
g.compare.md5 -c ainput=elevation binput=dem

AUTHOR

Luca Delucchi, Fondazione Edmund Mach, Research and Innovation Centre, Department of Biodiversity and Molecular Ecology, GIS and Remote Sensing Unit, Italy

SOURCE CODE

Available at: g.compare.md5 source code (history)


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© 2003-2018 GRASS Development Team, GRASS GIS 7.4.2svn Reference Manual