[GRASS-user] red square around node topology information?

[Hamish]

Giovanni wrote:
> I haven't been able to find an explanation for the meaning of
> the square boxes that appear around my lines layer's nodes,
> when I display topological informations on the map. 
>
> I thought they could indicate errors, but my layer appear to be
> topologically ok. 

they are just simple boxes drawn around all nodes.
see {D|G}_plot_icon() at the end of d.vect/topo.c
https://trac.osgeo.org/grass/browser/grass/trunk/display/d.vect/topo.c#L75


Hamish