t.topology(1grass)

💖 t.topology — the GLOW UP 💖

okay so bestie, this one lives in the GRASS User's Manual, and it's literally called t.topology. She's a whole temporal icon whose entire personality is listing the temporal topology of a space time dataset. that's it. that's the job. and she ATE. 🎀

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✨ NAME ✨

t.topology — lists temporal topology of a space time dataset. periodt. 💅

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🌈 KEYWORDS 🌈

temporal, topology, time

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🦋 SYNOPSIS 🦋

t.topology
t.topology --help
t.topology [-ms] input=name  [type=name]   [where=sql_query]   [--help]
[--verbose]  [--quiet]  [--ui]

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👑 FLAGS 👑

• -m — prints the temporal topological relationships and then dips. that's it, that's the whole vibe.
• -s — prints the spatio-temporal topological relationships and then dips. also iconic, also final.
• --help — prints the usage summary so you're not out here guessing. 🫶
• --verbose — verbose module output, aka she tells you everything, no secrets.
• --quiet — quiet module output, aka she's giving mysterious minimalism.
• --ui — force launches the GUI dialog. clicky clicky, main character energy. ✨

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🎀 PARAMETERS 🎀

• input=name [required] — the name of the input space time dataset. yeah, this one's mandatory, no skipping it bestie.
• type=name — the type of the input space time dataset.
  • Options: strds, stvds, str3ds
  • Default: strds
• where=sql_query — WHERE conditions of the SQL statement, without the 'where' keyword, used in the temporal GIS framework.
  • Example: start_time > '2001-01-01 12:30:00'

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💜 DESCRIPTION 💜

so the tea is: the module t.topology lists the temporal relations of the maps inside a space time dataset. that's the whole plot. she looks at your dataset and tells you how everything relates in time. simple. elegant. slay. 💖

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🌸 EXAMPLE 🌸

when you wanna get the info about your space time dataset topology, you literally just run this:

t.topology tempmean_monthly@climate_2009_2012

and she serves you this masterpiece, no notes:

 +-------------------- 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
 +----------------------------------------------------------------------------+

look at those Follows: ................... 47 and Precedes: .................. 47 lines. she's thriving. 😭✨

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🔥 SEE ALSO 🔥

t.create, t.info

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💅 AUTHOR 💅

Sören Gebbert, Thünen Institute of Climate-Smart Agriculture — thank you for your service king 🫡👑

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⭐ SOURCE CODE ⭐

Available at: t.topology source code (history)

Latest change: Thursday Dec 18 07:11:47 2025 in commit: cf870a5e49fd2643a55de543467edf5c2e61d640

Main index | Temporal index | Topics index | Keywords index | Graphical index | Full index

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okay so that's the whole page bestie, and now the cute sign-off: this is GRASS 8.5.0, straight out of the GRASS 8.5.0 Reference Manual, and the copyright is © 2003-2026 GRASS Development Team 🦋💖 so like, respect the elders, they built all this. mwah. 😘✨