DESCRIPTION
t.rast.to.vect is designed to convert a space time raster dataset
into a space time vector dataset. This module works as a front-end to
r.to.vect and therefore supports all parameter
of this module. Hence, all raster map layers in a space time raster dataset
are passed to r.to.vect that converts them into
vector map layers (using point,line or area as conversion criteria).
Please refer to the r.to.vect documentation
for a detailed description of the raster to vector conversion options.
The new generated vector map
layers will be registered in the output space time vector dataset, using
the same time stamps as their raster map layer origins.
This module supports the parallel processing of r.to.vect
module instances. The number of parallel processes
can be set with the nprocs option.
However, this will only work in conjunction with the -t
flag, that avoids the creation of attribute tables.
The parallel creation of attribute tables is not supported.
The where option allows selecting subsets of the input space time raster
dataset.
The flag -n can be used to force the registration of empty
vector map layers. Empty vector maps may occur in case that empty
raster map layers should be converted into vector map layers.
SEE ALSO
r.to.vect,
t.rast.db.select,
t.info
AUTHOR
Sören Gebbert, Geoinformatikbüro Dassau
Last changed: $Date$