[josm-dev] Relation member sort cleanup

[Dirk Stöcker]

On Thu, 9 Jul 2009, Christiaan Welvaart wrote:

>> >  It was mentioned that the sort feature is not really useful. Why is 
>> >  that, and
>> >  how could it be made (more) useful?
>>
>>  I should have been more verbose. I did not deep-analyse the mechanism but
>>  it seems you only sort the first block of ways. This does not work for
>>  splintered relations.
>
> Sure, that is a limitation of this simple feature. But I do not see how one 
> could sort a branched two-way route relation into a linear list.

Not branched two-way. Unfinished single way. This will consist of multiple 
snippets which are unconnected, but should be connected by the ways 
inbetween. The sort function should leave a sorting, which makes fixing 
remaining bugs much easier than it is now.

So the general tasks is to leave as many connected parts as possible (i.e. 
minimize unconnected parts).

>>  In multipolygon drawing of mappaint I choosed to join all ways at there
>>  end points and the as a result I have multiple groups of joined ways. This
>>  can be done in relation sort as well. The last step would then be to
>>  bring these groups in correct order (i.e. sort them by minimal distance of
>>  end points.
>
> Since multipolygons are often nested, it would make sense to group those in 
> nesting order. But then such groups should be marked in the relation editor, 
> e.g. in a tree structure. Maybe this can be implemented in a separate 
> multipolygon editor...

I don't talk about multipolygons. I only took that as demonstration how it 
can be done.

Currently route relations are the relation type which needs sorting most 
(at least from my point of view).

Ciao
-- 
http://www.dstoecker.eu/ (PGP key available)