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

# t.vect.what.strds(1grass)

Stores raster map values at spatial and temporal positions of vector points as vector attributes.

## NAME

**t.vect.what.strds**  - Stores raster map values at spatial and temporal positions of vector points as vector attributes.

## KEYWORDS

temporal, sampling, vector, time

## SYNOPSIS

**t.vect.what.strds**\
 **t.vect.what.strds --help**\
 **t.vect.what.strds** **input**=*name* **strds**=*name*  \[**column**=*string*\]  **method**=*string*  \[**where**=*sql\_query*\]   \[**t\_where**=*sql\_query*\]   \[**sampling**=*name*\[,*name*,...\]\]   \[--**help**\]  \[--**verbose**\]  \[--**quiet**\]  \[--**ui**\]

### Flags:

- **--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 vector dataset

- **strds**=*name* **\[required\]**

  Name of the input space time raster dataset

- **column**=*string*

  Name of the vector column to be created and to store sampled raster values\
   The use of a column name forces t.vect.what.rast to sample only values from the first map found in an interval. Otherwise the raster map names are used as column names

- **method**=*string* **\[required\]**

  Aggregate operation to be performed on the raster maps\
   Options: *disabled, average, count, median, mode, minimum, min\_raster, maximum, max\_raster, stddev, range, sum, variance, diversity, slope, offset, detcoeff, quart1, quart3, perc90, quantile, skewness, kurtosis*\
   Default: *disabled*

- **where**=*sql\_query*

  WHERE conditions of SQL statement without ’where’ keyword\
   Example: income \< 1000 and population \>= 10000

- **t\_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’

- **sampling**=*name\[,name*,...\]

  The method to be used for sampling the input dataset\
   Options: *start, during, overlap, contain, equal, follows, precedes*\
   Default: *start*

## DESCRIPTION

The module *t.vect.what.strds* samples a space time raster dataset (STRDS) at the spatio-temporal locations of a space time vector dataset (STVDS).

## EXAMPLE

The example is based on the space time vector dataset "precip\_stations@climate\_2009\_2012" created in the t.vect.observe.strds example. In the example below, the module fills the new column "new\_temp" with values extracted from the "tempmean\_monthly" space time raster dataset:\

```
t.vect.what.strds input=precip_stations@climate_2009_2012 \
                  strds=tempmean_monthly@climate_2009_2012 \
                  column=new_temp method=average
```

## SEE ALSO

*r.univar,* *v.univar,* *v.what.rast,* *v.what.rast3,* *v.what.strds,* *v.what.vect,* *t.create,* *t.info*

## AUTHOR

Sören Gebbert, Thünen Institute of Climate-Smart Agriculture

## SOURCE CODE

Available at: t.vect.what.strds source code (history)

Accessed: Monday Feb 24 17:51:47 2025

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