On Friday 31 May 2019, Andy Townsend wrote: > > I suspect that the OSM Carto style would be open to pull requests > that looked at the sub-tags of canals etc. if it could be done in a > way that wasn't over-complicated - look at OSM Carto's handling of > leaf type for a possible way forward.
Indeed. There is discussion on this happening in: https://github.com/gravitystorm/openstreetmap-carto/issues/3354 The important thing is to look at the data and to do it world wide and to avoid wishful thinking along the lines of "this tag looks like it could be useful to differentiate rendering so let's just assume is is actually used in the a way it would be helpful". leaf_type is easy because it represents a simple and well defined biological fact. Characterizing canals as human built structures in a similarly clear way is much harder. > A bigger problem is the lack of granularity of rendering width at > various zoom levels (see for example > https://www.openstreetmap.org/#map=13/54.1856/-0.8334 , > https://www.openstreetmap.org/#map=14/54.1850/-0.8258 and compare > with > https://map.atownsend.org.uk/maps/map/map.html#zoom=14&lat=54.18504&l >on=-0.80956 ). Yes. As mentioned in https://github.com/gravitystorm/openstreetmap-carto/issues/3354#issuecomment-496449087 the whole waterway line with stepping across zoom levels is full of fairly strange historic artefacts and not really well thought through. Combined with removing minor waterways from z13 waterways are quite a mess now. And more generally speaking creating a map style that does an equally decent job at representing all kinds of geographic settings around the world as it is the stated aim of OSM-Carto is inevitably a constant uphill battle because the vast majority of mappers and developers in OSM simply are from urban environments in Europe and North America which brings an inherent bias with it. How well OSM-Carto manages to fulfill its function to create a map for the whole OSM community to a large extent depends on how well we manage to compensate for this inherent bias. -- Christoph Hormann http://www.imagico.de/ _______________________________________________ Tagging mailing list Tagging@openstreetmap.org https://lists.openstreetmap.org/listinfo/tagging
