---
name: "t.topology"
section: "1grass"
platform: "linux"
package: "grass-doc"
version: "8.4.1-1"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/t.topology"
---

# t.topology(1grass)

Lists temporal topology of a space time dataset.

## NAME

**t.topology**  - Lists temporal topology of a space time dataset.

## KEYWORDS

temporal, topology, time

## SYNOPSIS

**t.topology**\
 **t.topology --help**\
 **t.topology** \[-**ms**\] **input**=*name*  \[**type**=*name*\]   \[**where**=*sql\_query*\]   \[--**help**\]  \[--**verbose**\]  \[--**quiet**\]  \[--**ui**\]

### Flags:

- **-m**

  Print temporal topological relationships and exit

- **-s**

  Print spatio-temporal topological relationships and exit

- **--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 dataset

- **type**=*name*

  Type of the input space time dataset\
   Options: *strds, stvds, str3ds*\
   Default: *strds*

- **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

The module *t.topology* lists temporal relations of the maps in a space time dataset.

## EXAMPLE

In order to obtain information about space time dataset topology, run:\

```
t.topology tempmean_monthly@climate_2009_2012
 +-------------------- Basic information -------------------------------------+
 | Id: ........................ tempmean_monthly@climate_2009_2012
 | Name: ...................... tempmean_monthly
 | Mapset: .................... climate_2009_2012
 | Creator: ................... lucadelu
 | Temporal type: ............. absolute
 | Creation time: ............. 2014-11-28 10:40:55.060096
 | Modification time:.......... 2014-11-28 16:08:42.166628
 | Semantic type:.............. mean
 +-------------------- Temporal topology -------------------------------------+
 | Is subset of dataset: ...... False
 | Temporal topology is: ...... valid
 | Number of intervals: ....... 48
 | Invalid time stamps: ....... 0
 | Number of points: .......... 0
 | Number of gaps: ............ 0
 | Granularity: ............... 1 month
 +-------------------- Topological relations ---------------------------------+
 | Overlaps: .................. 0
 | Overlapped: ................ 0
 | Finishes: .................. 0
 | Started: ................... 0
 | Follows: ................... 47
 | Contains: .................. 0
 | Equal:...................... 0
 | Finished: .................. 0
 | Precedes: .................. 47
 | Starts: .................... 0
 | During: .................... 0
 +----------------------------------------------------------------------------+
```

## SEE ALSO

*t.create,* *t.info*

## AUTHOR

Sören Gebbert, Thünen Institute of Climate-Smart Agriculture

## SOURCE CODE

Available at: t.topology source code (history)

Accessed: Monday Feb 24 17:51:46 2025

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