We map rivers as lines, then -add- water polygons to them. The same logic should prevail when it comes to roads IMHO : the abstract road axis should remain after someone maps the exact walkable area in detail. I'm cases where the axis is missing, I'd say add it in. To increase practical usability, I believe it is best to share a node where the axis line enters and leaves the polygon. Op 18-feb.-2016 21:12 schreef "Santens Seppe" <seppe.sant...@stad.gent>:
> Hi Glenn, > > To be clear: I didn't mean merging datasets, but just drawing the axes > from the GRB WMS. I'm asking this question because I'm looking at > pedestrian routing through the pedestrian zone in Ghent. Say we take > Poeljemarkt / Emile Braunplein and Sint-Baafsplein as an example. A route > planner seems to guide you along the edges of the pedestrian area or make a > detour along highways that are already in OSM, e.g. like this [1]. If you > look at the GRB map [2], you see that Agiv has drawn road axes through > (most of) these squares/areas. Of course, there are endless possible ways > to cross a square (but also some impossible ways). However, the road axes > in the GRB usually seem to be a "logical" or often used way. When adding > these axes to OSM, the routing algorithm could "snap" to them, like in this > example: [3]. I added the road axes in this example myself, but afterwards > wondered whether I should continue doing this, hence my email. Maybe this > is too much mapping for the renderer/router? > > [1] > https://www.openstreetmap.org/directions?engine=mapzen_foot&route=51.05348%2C3.72545%3B51.05418%2C3.72460#map=17/51.05412/3.72500 > [2] > http://www.geopunt.be/kaart?viewer_url=http%3A%2F%2Fmaps.geopunt.be%2Fresources%2Fapps%2FGeopunt-kaart_app%2Findex.html%3Fid%3Dff80808152f3febb0152f4a662340009 > [3] > https://www.openstreetmap.org/directions?engine=mapzen_foot&route=51.05553%2C3.72031%3B51.05533%2C3.72185#map=18/51.05537/3.72184 > > Seppe > > -----Oorspronkelijk bericht----- > Van: Glenn Plas [mailto:gl...@byte-consult.be] > Verzonden: donderdag 18 februari 2016 13:59 > Aan: OpenStreetMap Belgium > Onderwerp: Re: [OSM-talk-be] road axes in pedestrian areas > > Hi Seppe, > > > I would hold off merging GRB data like axes into OSM. which is the > dataset you found these in? See > http://wiki.openstreetmap.org/wiki/WikiProject_Belgium/GRB > > What is the added value in your view ? > > Glenn > > > On 18-02-16 12:30, Santens Seppe wrote: > > Hi all, > > > > > > > > Are there any sensitivities I should know of when adding “road” axes > > in pedestrian areas? My idea is to add to OSM the axes that are in the > > GRB > > (Agiv) to aid pedestrian routing. I’ve seen this in some places, in > > others not (yet?). Is it considered ok to do this? Or would you advice > > against this because these “virtual axes” cannot be verified in the > field? > > > > > > > > Seppe > > > > > > > > _______________________________________________ > > Talk-be mailing list > > Talk-be@openstreetmap.org > > https://lists.openstreetmap.org/listinfo/talk-be > > > > > _______________________________________________ > Talk-be mailing list > Talk-be@openstreetmap.org > https://lists.openstreetmap.org/listinfo/talk-be > _______________________________________________ > Talk-be mailing list > Talk-be@openstreetmap.org > https://lists.openstreetmap.org/listinfo/talk-be >
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