Local catalogues

GAIA allows you to save remote catalogue queries to a local file. These can then be re-loaded and plotted as if on-line catalogues. This is very useful if you need to re-plot catalogues, but equally useful is the fact that local catalogues may be modified. So you can edit, sort, select and delete records (using a tool like TOPCAT or a simple editor if the facilities GAIA offers are not sufficient).