Temporal data processing - Revision history

Neteler: /* References */

2025-07-02T08:51:36Z

References

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	* Gebbert, S., Pebesma, E. 2014. ''TGRASS: A temporal GIS for field based environmental modeling''. Environmental Modelling & Software 53, 1-12 ([https://doi.org/10.1016/j.envsoft.2013.11.001 DOI]) - [https://ifgi.uni-muenster.de/~epebe_01/tgrass.pdf preprint PDF]		* Gebbert, S., Pebesma, E. 2014. ''TGRASS: A temporal GIS for field based environmental modeling''. Environmental Modelling & Software 53, 1-12 ([https://doi.org/10.1016/j.envsoft.2013.11.001 DOI]) - [https://ifgi.uni-muenster.de/~epebe_01/tgrass.pdf preprint PDF]
	* Gebbert, S., Pebesma, E. 2017. ''The GRASS GIS temporal framework''. International Journal of Geographical Information Science 31, 1273-1292 ([https://doi.org/10.1080/13658816.2017.1306862 DOI]) - [https://figshare.com/articles/journal_contribution/The_GRASS_GIS_temporal_framework/4834013/1/files/8024429.pdf PDF]		* Gebbert, S., Pebesma, E. 2017. ''The GRASS GIS temporal framework''. International Journal of Geographical Information Science 31, 1273-1292 ([https://doi.org/10.1080/13658816.2017.1306862 DOI]) - [https://figshare.com/articles/journal_contribution/The_GRASS_GIS_temporal_framework/4834013/1/files/8024429.pdf PDF]
	* Gebbert, S., Leppelt, T., Pebesma, E., 2019. ''A topology based spatio-temporal map algebra for big data analysis''. Data 4, 86. ([https://doi.org/10.3390/data4020086 DOI]) - [https://www.mdpi.com/2306-5729/4/2/86/pdf?version=1560849201 PDF]		* Gebbert, S., Leppelt, T., Pebesma, E., 2019. ''A topology based spatio-temporal map algebra for big data analysis''. Data 4, 86. ([https://doi.org/10.3390/data4020086 DOI]) - [https://www.mdpi.com/2306-5729/4/2/86/pdf?version=1560849201 PDF]. Content:
			** Object oriented code design
			** Code examples
			*** Registration of existing raster layers
			*** Temporal aggregation of a raster time series
			*** Sampling a raster time series at vector points
			*** Spatio-temporal intersection of trajectories
			*** Benchmark Python code

	== See also ==		== See also ==

Neteler: /* References */

2025-07-02T08:49:47Z

References

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	== References ==		== References ==
	* Gebbert, S., Pebesma, E. 2014. ''TGRASS: A temporal GIS for field based environmental modeling''. Environmental Modelling & Software 53, 1-12 ([~~http~~://~~dx.~~doi.org/10.1016/j.envsoft.2013.11.001 DOI]) - [~~http~~://ifgi.uni-muenster.de/~epebe_01/tgrass.pdf preprint PDF]		* Gebbert, S., Pebesma, E. 2014. ''TGRASS: A temporal GIS for field based environmental modeling''. Environmental Modelling & Software 53, 1-12 ([https://doi.org/10.1016/j.envsoft.2013.11.001 DOI]) - [https://ifgi.uni-muenster.de/~epebe_01/tgrass.pdf preprint PDF]
	* Gebbert, S., Pebesma, E. 2017. ''The GRASS GIS temporal framework''. International Journal of Geographical Information Science 31, 1273-1292 ([~~http~~://~~dx.~~doi.org/10.1080/13658816.2017.1306862 DOI]) - [https://figshare.com/articles/journal_contribution/The_GRASS_GIS_temporal_framework/4834013/1/files/8024429.pdf PDF]		* Gebbert, S., Pebesma, E. 2017. ''The GRASS GIS temporal framework''. International Journal of Geographical Information Science 31, 1273-1292 ([https://doi.org/10.1080/13658816.2017.1306862 DOI]) - [https://figshare.com/articles/journal_contribution/The_GRASS_GIS_temporal_framework/4834013/1/files/8024429.pdf PDF]
	* Gebbert, S., Leppelt, T., Pebesma, E., 2019. ''A topology based spatio-temporal map algebra for big data analysis''. Data 4, 86. ([https://doi.org/10.3390/data4020086 DOI]) - [https://www.mdpi.com/2306-5729/4/2/86/pdf?version=1560849201 PDF]		* Gebbert, S., Leppelt, T., Pebesma, E., 2019. ''A topology based spatio-temporal map algebra for big data analysis''. Data 4, 86. ([https://doi.org/10.3390/data4020086 DOI]) - [https://www.mdpi.com/2306-5729/4/2/86/pdf?version=1560849201 PDF]

Neteler: Cleanup

2025-07-02T08:43:17Z

Cleanup

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	== Online tutorials and courses ==		== Online tutorials and courses ==

	* [~~http~~://www.geostat-course.org/~~Topic_Gebbert~~ The temporal GRASS GIS framework: Introduction and application] by Sören Gebbert (2012)		* [https://web.archive.org/web/20160119125858/www.geostat-course.org/topic_gebbert/ The temporal GRASS GIS framework: Introduction and application] by Sören Gebbert (2012)
	* ~~[http~~://fatra.cnr.ncsu.edu/temporal-grass-workshop/ Spatio-temporal data handling and visualization in GRASS GIS] - FOSS4G 2014 workshop by Vaclav Petras, Anna Petrasova, Helena Mitasova, Markus Neteler (2014)		* CZ: [https://web.archive.org/web/20180316200749/https://training.gismentors.eu/grass-gis-pokrocily/tgrass/index.html Úvod do časoprostorových analýz] (Introduction to space-time analysis) by Martin Landa (2015)
	* [~~http~~://~~www~~.~~openniche~~.org/~~processing-era-interim-dataset-in-ncdf-using-gdal-and-grass-gis~~/ ~~Processing ERA-Interim dataset in netcdf using GDAL and GRASS GIS] by Sajid Pareeth (2015)~~		* [https://gismentors.github.io/grass-gis-workshop-jena/units/21.html Sentinel spatio-temporal processing] by Martin Landa (2020)
	* CZ: [http://training.gismentors.eu/grass-gis-pokrocily/tgrass/index.html Úvod do časoprostorových analýz] (Introduction to space-time analysis) by Martin Landa (2015)
	* [https://~~training~~.~~gismentors~~.eu/grass-gis-workshop-jena/units/21.html Sentinel spatio-temporal processing] by Martin Landa (2020)
	* [https://github.com/veroandreo/tgrass_workshop_foss4g_eu TGRASS: temporal data processing with GRASS GIS] FOSS4G-EU workshop by Veronica Andreo, Luca Delucchi and Markus Neteler (2017)		* [https://github.com/veroandreo/tgrass_workshop_foss4g_eu TGRASS: temporal data processing with GRASS GIS] FOSS4G-EU workshop by Veronica Andreo, Luca Delucchi and Markus Neteler (2017)
	* [https://gitpitch.com/veroandreo/grass-gis-geostat-2018/master?p=tgrass&grs=gitlab Spatio-temporal data processing and visualization with GRASS GIS], GEOSTAT Summer School lecture by Veronica Andreo (2018)

	== References ==		== References ==

Neteler: Restore page (revert Wiki glitch)

2022-12-20T17:55:58Z

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Neteler: added links to PDF

2022-12-20T17:54:05Z

added links to PDF

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Neteler: +Sentinel spatio-temporal processing

2021-06-28T21:08:57Z

+Sentinel spatio-temporal processing

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	* [http://www.openniche.org/processing-era-interim-dataset-in-ncdf-using-gdal-and-grass-gis/ Processing ERA-Interim dataset in netcdf using GDAL and GRASS GIS] by Sajid Pareeth (2015)		* [http://www.openniche.org/processing-era-interim-dataset-in-ncdf-using-gdal-and-grass-gis/ Processing ERA-Interim dataset in netcdf using GDAL and GRASS GIS] by Sajid Pareeth (2015)
	* CZ: [http://training.gismentors.eu/grass-gis-pokrocily/tgrass/index.html Úvod do časoprostorových analýz] (Introduction to space-time analysis) by Martin Landa (2015)		* CZ: [http://training.gismentors.eu/grass-gis-pokrocily/tgrass/index.html Úvod do časoprostorových analýz] (Introduction to space-time analysis) by Martin Landa (2015)
			* [https://training.gismentors.eu/grass-gis-workshop-jena/units/21.html Sentinel spatio-temporal processing] by Martin Landa (2020)
	* [https://github.com/veroandreo/tgrass_workshop_foss4g_eu TGRASS: temporal data processing with GRASS GIS] FOSS4G-EU workshop by Veronica Andreo, Luca Delucchi and Markus Neteler (2017)		* [https://github.com/veroandreo/tgrass_workshop_foss4g_eu TGRASS: temporal data processing with GRASS GIS] FOSS4G-EU workshop by Veronica Andreo, Luca Delucchi and Markus Neteler (2017)
	* [https://gitpitch.com/veroandreo/grass-gis-geostat-2018/master?p=tgrass&grs=gitlab Spatio-temporal data processing and visualization with GRASS GIS], GEOSTAT Summer School lecture by Veronica Andreo (2018)		* [https://gitpitch.com/veroandreo/grass-gis-geostat-2018/master?p=tgrass&grs=gitlab Spatio-temporal data processing and visualization with GRASS GIS], GEOSTAT Summer School lecture by Veronica Andreo (2018)

Neteler: grass76 --> grass-stable

2021-06-27T20:10:04Z

grass76 --> grass-stable

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	== Introduction ==		== Introduction ==

	TGRASS is the temporal enabled GRASS GIS~~. It is available from [http://grass.osgeo.org/grass7/ GRASS GIS 7] onwards~~.		TGRASS is the temporal enabled GRASS GIS.
	TGRASS is completely metadata based, i.e. it does not change any data but simply handles the organization of raster, vector, raster3D maps actually stored in a GRASS GIS mapset by registering in an additional internal database. This is done specifically for managing temporal and spatial extent including temporal topology.		TGRASS is completely metadata based, i.e. it does not change any data but simply handles the organization of raster, vector, raster3D maps actually stored in a GRASS GIS mapset by registering in an additional internal database. This is done specifically for managing temporal and spatial extent including temporal topology.

	Manual overview: https://grass.osgeo.org/~~grass76~~/manuals/temporalintro.html		Manual overview: https://grass.osgeo.org/grass-stable/manuals/temporalintro.html

	== Terminology Overview ==		== Terminology Overview ==
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	</source>		</source>

	to set the default temporal GIS database connection for the current mapset. If the connection is not ~~iniatially~~ set with {{cmd\|t.connect}}, any temporal module that you try to run for the first time will first set the connection to the temporal database for you. The default TGIS database of type ''sqlite3'' is located in the PERMANENT mapset directory. Temporal GIS content from all created mapsets will be stored there.		to set the default temporal GIS database connection for the current mapset. If the connection is not initially set with {{cmd\|t.connect}}, any temporal module that you try to run for the first time will first set the connection to the temporal database for you. The default TGIS database of type ''sqlite3'' is located in the PERMANENT mapset directory. Temporal GIS content from all created mapsets will be stored there.

	=== Creating a STRDS and registering maps ===		=== Creating a STRDS and registering maps ===
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	</source>		</source>

	Another option would be to use ~~[https://grass.osgeo.org/grass71/manuals/t.rast.what.html~~ t.rast.what] that samples a space time raster dataset at specific vector point coordinates and writes the output to stdout or text file using different layouts. This module doesn't write the vector's attribute table.		Another option would be to use {{cmd\|t.rast.what}} that samples a space time raster dataset at specific vector point coordinates and writes the output to stdout or text file using different layouts. This module doesn't write the vector's attribute table.

	<source lang="bash">		<source lang="bash">
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	* Introduction: [http://www.slideshare.net/Luis_de_Sousa/presentation-soeren GRASS as a Temporal GIS] by Sören Gebbert (slides)		* Introduction: [http://www.slideshare.net/Luis_de_Sousa/presentation-soeren GRASS as a Temporal GIS] by Sören Gebbert (slides)
	* [https://archive.org/details/TheTemporalGrassGisFrameworkIntroductionAndApplication# The temporal GRASS GIS framework: Introduction and application] Video of Sören Gebbert's presentation in [http://www.geostat-course.org/Muenster_2012 GEOSTAT course] 2012		* [https://archive.org/details/TheTemporalGrassGisFrameworkIntroductionAndApplication# The temporal GRASS GIS framework: Introduction and application] Video of Sören Gebbert's presentation in [http://www.geostat-course.org/Muenster_2012 GEOSTAT course] 2012
	* [~~http~~://grass.osgeo.org/~~grass76~~/manuals/temporalintro.html Introduction to temporal modules] (GRASS GIS manual)		* [https://grass.osgeo.org/grass-stable/manuals/temporalintro.html Introduction to temporal modules] (GRASS GIS manual)
	* [~~http~~://grass.osgeo.org/~~grass76~~/manuals/temporal.html Available temporal modules] (GRASS GIS manual)		* [https://grass.osgeo.org/grass-stable/manuals/temporal.html Available temporal modules] (GRASS GIS manual)
	* [~~http~~://trac.osgeo.org/grass/wiki/Grass7/TemporalExtension Temporal Extension] (background info in trac)		* [https://trac.osgeo.org/grass/wiki/Grass7/TemporalExtension Temporal Extension] (background info in trac)
	* [[GRASS GSoC 2013 Temporal GIS Algebra for raster and vector data in GRASS]]		* [[GRASS GSoC 2013 Temporal GIS Algebra for raster and vector data in GRASS]]

Neteler: refer to extracting timestamps from map names examples

2020-12-29T12:42:17Z

refer to extracting timestamps from map names examples

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	This module (and TGRASS in general) supports '''absolute time''' and '''relative time'''. The ''absolute'' temporal type refers to a fixed date or interval in the Gregorian calendar, while the ''relative'' temporal type refers to data without fixed time stamps (e.g., sequential maps used to calculate multi-decadal averages). Refer to the [http://www.geostat-course.org/system/files/Presentation_0.pdf TGRASS overview slides] for background.		This module (and TGRASS in general) supports '''absolute time''' and '''relative time'''. The ''absolute'' temporal type refers to a fixed date or interval in the Gregorian calendar, while the ''relative'' temporal type refers to data without fixed time stamps (e.g., sequential maps used to calculate multi-decadal averages). Refer to the [http://www.geostat-course.org/system/files/Presentation_0.pdf TGRASS overview slides] for background.

	Maps can be registered by command line argument (i.e., a list of comma separated map names) or using an input file. The start time, end time and a temporal increment can be provided either by command line or in the input file. End time and increment are mutually exclusive. Maps can be registered in several space time datasets using the same timestamp. For a more detailed explanation and examples on how to register maps in stds, see also [https://grasswiki.osgeo.org/wiki/Temporal_data_processing/maps_registration maps registration] wiki.		Maps can be registered by command line argument (i.e., a list of comma separated map names) or using an input file. The start time, end time and a temporal increment can be provided either by command line or in the input file. End time and increment are mutually exclusive. Maps can be registered in several space time datasets using the same timestamp. For a more detailed explanation and examples on how to register maps in stds, see also [https://grasswiki.osgeo.org/wiki/Temporal_data_processing/maps_registration maps registration] wiki page.

	Start time and end time with absolute time must be provided using the format yyyy-mm-dd HH:MM:SS +HHMM. It is also supported to specify the date yyyy-mm-dd only. In case of relative time, the temporal unit (years, months, days, hours, minutes or seconds) must be provided. The relative start time, end time and the increment are integers (see also {{cmd\|t.register}}).		Start time and end time with absolute time must be provided using the format yyyy-mm-dd HH:MM:SS +HHMM. It is also supported to specify the date yyyy-mm-dd only. In case of relative time, the temporal unit (years, months, days, hours, minutes or seconds) must be provided. The relative start time, end time and the increment are integers (see also {{cmd\|t.register}}).
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	t.rast.colors input=cla rules=path/to/your/color_table		t.rast.colors input=cla rules=path/to/your/color_table
	</source>		</source>

			Further examples of '''extracting timestamps from map names''' can be found here: [https://grasswiki.osgeo.org/wiki/Temporal_data_processing/maps_registration maps registration] wiki page.

	=== Getting some basic info and statistics ===		=== Getting some basic info and statistics ===

Neteler: /* References */ +Gebbert et al 2019: A topology based spatio-temporal map algebra for big data analysis

2019-06-21T12:28:49Z

References: +Gebbert et al 2019: A topology based spatio-temporal map algebra for big data analysis

← Older revision		Revision as of 12:28, 21 June 2019
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	* Gebbert, S., Pebesma, E. 2014. ''TGRASS: A temporal GIS for field based environmental modeling''. Environmental Modelling & Software 53, 1-12 ([http://dx.doi.org/10.1016/j.envsoft.2013.11.001 DOI]) - [http://ifgi.uni-muenster.de/~epebe_01/tgrass.pdf preprint PDF]		* Gebbert, S., Pebesma, E. 2014. ''TGRASS: A temporal GIS for field based environmental modeling''. Environmental Modelling & Software 53, 1-12 ([http://dx.doi.org/10.1016/j.envsoft.2013.11.001 DOI]) - [http://ifgi.uni-muenster.de/~epebe_01/tgrass.pdf preprint PDF]
	* Gebbert, S., Pebesma, E. 2017. ''The GRASS GIS temporal framework''. International Journal of Geographical Information Science 31, 1273-1292 ([http://dx.doi.org/10.1080/13658816.2017.1306862 DOI])		* Gebbert, S., Pebesma, E. 2017. ''The GRASS GIS temporal framework''. International Journal of Geographical Information Science 31, 1273-1292 ([http://dx.doi.org/10.1080/13658816.2017.1306862 DOI])
			* Gebbert, S., Leppelt, T., Pebesma, E., 2019. ''A topology based spatio-temporal map algebra for big data analysis''. Data 4, 86. ([https://doi.org/10.3390/data4020086 DOI])

	== See also ==		== See also ==

Neteler: G72 -> G76

2019-04-01T09:25:15Z

G72 -> G76

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	TGRASS is completely metadata based, i.e. it does not change any data but simply handles the organization of raster, vector, raster3D maps actually stored in a GRASS GIS mapset by registering in an additional internal database. This is done specifically for managing temporal and spatial extent including temporal topology.		TGRASS is completely metadata based, i.e. it does not change any data but simply handles the organization of raster, vector, raster3D maps actually stored in a GRASS GIS mapset by registering in an additional internal database. This is done specifically for managing temporal and spatial extent including temporal topology.

	Manual overview: https://grass.osgeo.org/~~grass72~~/manuals/temporalintro.html		Manual overview: https://grass.osgeo.org/grass76/manuals/temporalintro.html

	== Terminology Overview ==		== Terminology Overview ==
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	* Introduction: [http://www.slideshare.net/Luis_de_Sousa/presentation-soeren GRASS as a Temporal GIS] by Sören Gebbert (slides)		* Introduction: [http://www.slideshare.net/Luis_de_Sousa/presentation-soeren GRASS as a Temporal GIS] by Sören Gebbert (slides)
	* [https://archive.org/details/TheTemporalGrassGisFrameworkIntroductionAndApplication# The temporal GRASS GIS framework: Introduction and application] Video of Sören Gebbert's presentation in [http://www.geostat-course.org/Muenster_2012 GEOSTAT course] 2012		* [https://archive.org/details/TheTemporalGrassGisFrameworkIntroductionAndApplication# The temporal GRASS GIS framework: Introduction and application] Video of Sören Gebbert's presentation in [http://www.geostat-course.org/Muenster_2012 GEOSTAT course] 2012
	* [http://grass.osgeo.org/~~grass72~~/manuals/temporalintro.html Introduction to temporal modules] (GRASS GIS manual)		* [http://grass.osgeo.org/grass76/manuals/temporalintro.html Introduction to temporal modules] (GRASS GIS manual)
	* [http://grass.osgeo.org/~~grass72~~/manuals/temporal.html Available temporal modules] (GRASS GIS manual)		* [http://grass.osgeo.org/grass76/manuals/temporal.html Available temporal modules] (GRASS GIS manual)
	* [http://trac.osgeo.org/grass/wiki/Grass7/TemporalExtension Temporal Extension] (background info in trac)		* [http://trac.osgeo.org/grass/wiki/Grass7/TemporalExtension Temporal Extension] (background info in trac)
	* [[GRASS GSoC 2013 Temporal GIS Algebra for raster and vector data in GRASS]]		* [[GRASS GSoC 2013 Temporal GIS Algebra for raster and vector data in GRASS]]