xenial (1) t.vect.what.strds.1grass.gz

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 inhab >= 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 at spatio-temporal locations of a  space
       time vector dataset.

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 below example the command 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

       Last changed: $Date: 2015-09-25 17:45:54 +0200 (Fri, 25 Sep 2015) $

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

       © 2003-2016 GRASS Development Team, GRASS GIS 7.0.3 Reference Manual