[josm-dev] Dropped arrows / visualize node connectivity

[Florian Lohoff]

On Tue, Mar 10, 2009 at 07:24:46PM +0100, Dirk Stöcker wrote:
> On Tue, 10 Mar 2009, Florian Lohoff wrote:
> > i just tried to delete my preferences and start from fresh after 1 1/2
> > Years and i like the visual changes i see. The only missing thing are
> > the arrows on every street. I know i can turn them on again but i'd just
> > like to make a point about visualizing.
> >
> > Typically the arrows indicated quite well if streets were connected.
> > On a crossing both ways would have at least a single arrow towards the
> > common node.
> >
> > Now the arrows get removed completely which is a good thing on one hand
> > but i would prefer a second mode which made "arrows" on both ends.
> >
> > Example:
> >
> > O<--------->O<-------->O
> >             ^
> >             |
> >             |
> >             |
> >
> > This would even more indicate a correct connection between ways.
> 
> Why? It would look exactly the same even if there are two overlaying nodes 
> in the middle.

The most common error i stumble upon is unconnected ways. Duplicate
nodes are rare in comparison. So visualizing connections more
prominently might reduce those errors i would expect - at least it did
for me in the past.

> > An even more interesting mode would be to make the first and last nodes
> > "arrows" on a way different from the others so one could see where a way
> > is split up instead of selecting the way and detect it by the highlighting
> >
> > I put arrows in " because it would not necessarily be arrows but some
> > end/start of segment indicator - probably just some change in line
> > thickness or something.
> 
> We could introduce some other colors/sizes for nodes (i.e. end-node, 
> multi-way-node). That would solve your suggestion.

Hmm - i'd rather visualize a way participating in a node. Your
suggestion only solves the case with 2 ways. Having more than 2 ways on
a node would probably visualize a multi-way-node although one of the
ways just heads over the node.

Flo
-- 
Florian Lohoff                  flo at rfc822.org             +49-171-2280134
	Those who would give up a little freedom to get a little 
          security shall soon have neither - Benjamin Franklin
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