[OSM-talk] multiple overlapping ways or snipped up ways?

[Peter Miller]

I am unclear how I should be mapping roads where the attributes change
frequently, for example for bridges, changes in name, changes in 'ref',
changes in  'ncn-ref', 'surface' etc etc.

 

It seems that one is allowed to have overlapping ways (certainly JOSM allows
this to happen) each with some of the tags; however it is impossible to
maintain in JOSM if one does do this, normally by mistake I my case  then
MapLint complains about it.

 

However.. if I snip up the ways every time there is the slightest change in
the associated tags then OSM_Render messes up the rendering, repeating the
names each time. See Woodbridge Road on the linked example.

http://www.informationfreeway.org/?lat=52.06124230525096
<http://www.informationfreeway.org/?lat=52.06124230525096&lon=1.172157272125
5897&zoom=17&layers=B000F00> &lon=1.1721572721255897&zoom=17&layers=B000F00

 

I do notice that Mapnik sorts out name rendering and must merge the
appropriate ways in one for naming purposes.

 

This 'snipping' is going to get worse because I now intend to add references
for the local and regional cycle routes, and these tend to duck and dive on
and off roads.

 

So. should I somehow be using multiple overlapping ways (I hope not), or
should I be snipping the ways up whenever a tag changes and leave it to
OSM_render to sort out the rendering side in due course.

 

A Final question; if a road has a local cycle route name (4A for example), a
national name (N1 for example) and also possibly a regional name ('suffolk
coastal route', 'R21') then should I put all of these under the same ncn-ref
tag separated by a semi-colon ('4A;N1;Suffolk Coastal Route') or should we
be inventing a new tag for local cycle routes ('lcn_ref' for example) and
regional cycle route ('rcn_ref' for example).

 

 

 

Thanks,

 

 

 

 

 

Peter

 

 

 

 

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.openstreetmap.org/pipermail/talk/attachments/20070609/09250f92/attachment.html>