Provided by: grass-doc_8.3.0-1_all 
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 directory where output is written
If not given, the default is the current working directory
Default: ./
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 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
SOURCE CODE
Available at: t.rast.export source code (history)
Accessed: Tuesday Jun 27 11:14:36 2023
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