[Angus Carr]

If the file is in a raster by id number, you could run r.stats
to determine which are above the minimum size. The -a switch will 
report size in square metres.

After that, it should be easy to rig up a reclass using r.reclass, 
reclassing the smaller polygons to 0. If you need to do this 
repeatedly, then a script to rig the reclass rules would not be hard 
to code.

Angus Carr.

> I hope you have a simple answer to my hopefully simple question.  I have a
> file with around 1000 polygons.  I need to have displayed or selected only
> those polygons that are less than 1544 acres.  This file exists in vector
> and raster format.  What command in GRASS would be used to 
> accomplish this?