t.vect.db.select(1)

NAME
t.vect.db.select.py - Prints attributes of vector maps registered in a space time vector dataset.

KEYWORDS
temporal, attribute table, vector, database, select, time

SYNOPSIS
t.vect.db.select.py
t.vect.db.select.py --help
t.vect.db.select.py input=name [columns=name[,name,...]] [separator=character] [layer=string] [where=sql_query] [t_where=sql_query] [--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

columns=name[,name,...]
    Name of attribute column(s)

separator=character
    Field separator character between the output columns
    Special characters: pipe, comma, space, tab, newline
    Default: pipe

layer=string
    Layer number or name
    Vector features can have category values in different layers. This number determines which layer to use. When used with direct OGR access this is the layer name.
    Default: 1

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’

DESCRIPTION
The module t.vect.db.select prints attributes of vector maps registered in a space time vector dataset.

EXAMPLE
The example is querying the shoreline space time dataset:

t.vect.db.select input=shoreline
start_time|end_time|cat|DESCR|SOURCE|DATE
1849|1873|1|T-736|NOAA/USGS|01/01/1858
1849|1873|2|T-657|NOAA/USGS|01/01/1857
1849|1873|3|T-381(2)|NOAA/USGS|01/01/1852
1849|1873|4|T-381(1)|NOAA/USGS|01/01/1852
1849|1873|5|T-381(1)|NOAA/USGS|01/01/1852
...
2009||44|2009 USDA NAIP|2009-07-11|VA, SAND, Wet / Dry
2009||45|2009 USDA NAIP|2009-07-11|Carolina Beach, SAND, Wet / Dry
2009||46|2009 USDA NAIP|2009-07-11|Carolina Beach, REVETMENT-ROCK, Hard Structure
2009||47|2009 USDA NAIP|2009-07-11|Fort Fisher, REVETMENT-ROCK, Hard Structure

In the following example it print only DATE and SOURCE columns for data before 1900-01-01.

t.vect.db.select input=shoreline column=DATE,SOURCE t_where="start_time < 1900"
start_time|end_time|DATE|SOURCE
1849|1873|01/01/1858|NOAA/USGS
1849|1873|01/01/1857|NOAA/USGS
1849|1873|01/01/1852|NOAA/USGS
1849|1873|01/01/1852|NOAA/USGS
...
1849|1873|01/01/1860|NOAA/USGS
1849|1873|01/01/1860|NOAA/USGS
1849|1873|01/01/1873|Coastal Carolina University
1849|1873|01/01/1873|Coastal Carolina University
1849|1873|01/01/1873|Coastal Carolina University

SEE ALSO
t.create, t.info

AUTHOR
Sören Gebbert, Thünen Institute of Climate-Smart Agriculture

SOURCE CODE

Available at: t.vect.db.select source code (history)

Accessed: Sat Jun 18 04:33:12 2022

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

© 2003-2022 GRASS Development Team, GRASS GIS 8.2.0 Reference Manual