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NAME

       t.rast.export  - Exports space time raster dataset.

KEYWORDS

       temporal, export, raster, time

SYNOPSIS

       t.rast.export
       t.rast.export --help
       t.rast.export     input=name    output=name     [directory=name]      [compression=string]
       [format=string]               [type=string]                [createopt=string[,string,...]]
       [metaopt=string[,string,...]]      [nodata=float]      [where=sql_query]     [--overwrite]
       [--help]  [--verbose]  [--quiet]  [--ui]

   Flags:
       --overwrite
           Allow output files to overwrite existing files

       --help
           Print usage summary

       --verbose
           Verbose module output

       --quiet
           Quiet module output

       --ui
           Force launching GUI dialog

   Parameters:
       input=name [required]
           Name of the input space time raster dataset

       output=name [required]
           Name of a space time raster dataset archive

       directory=name
           Path to the work directory, default is /tmp
           Default: /tmp

       compression=string
           Compression method of the tar archive
           Options: no, gzip, bzip2
           Default: bzip2

       format=string
           The export format of a single raster map
           Supported are GTiff, AAIGrid via r.out.gdal and the GRASS package format of r.pack
           Options: GTiff, AAIGrid, pack
           Default: GTiff

       type=string
           Data type
           Supported only for GTiff
           Options: Byte,  Int16,  UInt16,  Int32,  UInt32,  Float32,  Float64,  CInt16,  CInt32,
           CFloat32, CFloat64

       createopt=string[,string,...]
           Creation option(s) to pass to the output format driver
           In the form of "NAME=VALUE", separate multiple entries with a comma

       metaopt=string[,string,...]
           Metadata key(s) and value(s) to include
           In the form of "META-TAG=VALUE", separate multiple entries with a comma. Not supported
           by all output format drivers.

       nodata=float
           Assign a specified nodata value to output bands
           If given, the nodata value is always written to metadata even if  there  are  no  NULL
           cells in the input band (enhances output compatibility).

       where=sql_query
           WHERE  conditions  of  SQL  statement without ’where’ keyword used in the temporal GIS
           framework
           Example: start_time > ’2001-01-01 12:30:00’

DESCRIPTION

       t.rast.export exports a space time raster dataset (strds) as a tar  archive.  The  archive
       contains  the  raster maps either as GeoTIFF files or as GRASS binary files exported using
       r.pack. The map specific color tables are exported in case of GeoTIFF files.  In  addition
       several  metadata  files are created in the archive that describe the temporal layout. All
       time stamps are stored in the file "list.txt", for each map one row. The name of the  map,
       the start time and the end time are written. In case of a time instance, the start time is
       equal to the end time. The "init.txt" file stores the temporal type, the number  of  maps,
       the  chosen  export  format  and  some  other  metadata.  The  "proj.txt"  file stores the
       projection information as a proj4 string of the location the space time raster dataset was
       exported  from.  The file "readme.txt" describes the file format. The output of r.info for
       each raster map in the space time dataset is stored in "metadata.txt".

       The tar archive can be compressed using the compress option. Gzip and bzip2 (default)  are
       available.  A  where  option  can  be specified, to export only a subset of the space time
       dataset. Archives exported with t.rast.export can be imported with t.rast.import.

NOTES

       The name of output file has to carry the suffix of the archive type, the following  suffix
       can be used:

           ·   .tar in the case of compress=no

           ·   .tar.bzip2 in the case of compress=bzip2

           ·   .tar.gzip in the case of compress=gzip

EXAMPLE

       In this example, all the raster maps of 2012 of "tempmean_monthly" will be exported:
       t.rast.export input=tempmean_monthly output=tempmean_monthly.tar.bzip2 \
                     where="start_time >= ’2012-01-01’ and start_time < ’2013-01-01’"
       tar xvjf precipitation_daily.tar.bzip2
       2012_01_tempmean.tif
       2012_01_tempmean.color
       2012_02_tempmean.tif
       2012_02_tempmean.color
       2012_03_tempmean.tif
       2012_03_tempmean.color
       2012_04_tempmean.tif
       2012_04_tempmean.color
       2012_05_tempmean.tif
       2012_05_tempmean.color
       2012_06_tempmean.tif
       2012_06_tempmean.color
       2012_07_tempmean.tif
       2012_07_tempmean.color
       2012_08_tempmean.tif
       2012_08_tempmean.color
       2012_09_tempmean.tif
       2012_09_tempmean.color
       2012_10_tempmean.tif
       2012_10_tempmean.color
       2012_11_tempmean.tif
       2012_11_tempmean.color
       2012_12_tempmean.tif
       2012_12_tempmean.color
       list.txt
       proj.txt
       init.txt
       readme.txt
       metadata.txt
       cat init.txt
       stds_type=strds
       format=GTiff
       temporal_type=absolute
       semantic_type=mean
       number_of_maps=48
       north=320000.0
       south=10000.0
       east=935000.0
       west=120000.0
       cat proj.txt
       +proj=lcc
       +lat_1=36.16666666666666
       +lat_2=34.33333333333334
       +lat_0=33.75
       +lon_0=-79
       +x_0=609601.22
       +y_0=0
       +no_defs
       +a=6378137
       +rf=298.257222101
       +towgs84=0.000,0.000,0.000
       +to_meter=1
       cat list.txt
       2012_01_tempmean|2012-01-01 00:00:00|2012-02-01 00:00:00
       2012_02_tempmean|2012-02-01 00:00:00|2012-03-01 00:00:00
       2012_03_tempmean|2012-03-01 00:00:00|2012-04-01 00:00:00
       2012_04_tempmean|2012-04-01 00:00:00|2012-05-01 00:00:00
       2012_05_tempmean|2012-05-01 00:00:00|2012-06-01 00:00:00
       2012_06_tempmean|2012-06-01 00:00:00|2012-07-01 00:00:00
       2012_07_tempmean|2012-07-01 00:00:00|2012-08-01 00:00:00
       2012_08_tempmean|2012-08-01 00:00:00|2012-09-01 00:00:00
       2012_09_tempmean|2012-09-01 00:00:00|2012-10-01 00:00:00
       2012_10_tempmean|2012-10-01 00:00:00|2012-11-01 00:00:00
       2012_11_tempmean|2012-11-01 00:00:00|2012-12-01 00:00:00
       2012_12_tempmean|2012-12-01 00:00:00|2013-01-01 00:00:00
       cat readme.txt
       This space time raster dataset was exported with t.rast.export of GRASS GIS 7
       Files:
              *.tif  -- GeoTIFF raster files
            *.color  -- GRASS GIS raster color rules
            proj.txt -- Projection information in PROJ.4 format
            init.txt -- GRASS GIS space time raster dataset information
            list.txt -- Time series file, lists all maps by name with interval
                        time stamps in ISO-Format. Field separator is |
        metadata.txt -- The output of t.info
          readme.txt -- This file

SEE ALSO

        t.rast.import, t.create, t.info, r.out.gdal, r.pack, t.vect.export

AUTHOR

       Sören Gebbert, Thünen Institute of Climate-Smart Agriculture

       Last changed: $Date: 2016-11-13 18:50:28 +0100 (Sun, 13 Nov 2016) $

SOURCE CODE

       Available at: t.rast.export source code (history)

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       © 2003-2018 GRASS Development Team, GRASS GIS 7.4.0 Reference Manual