t.vect.db.select - GRASS GIS manual

Note: This document is for an older version of GRASS GIS that has been discontinued. You should upgrade, and read the current manual page.

NAME

t.vect.db.select - 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

t.vect.db.select --help

t.vect.db.select 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
EXAMPLE
SEE ALSO
AUTHOR

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

AUTHOR

Sören Gebbert, Thünen Institute of Climate-Smart Agriculture

SOURCE CODE

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

Latest change: Thursday Jan 26 14:10:26 2023 in commit: cdd84c130cea04b204479e2efdc75c742efc4843