Bonjour,
Comment signaler une erreur sur une carte ?
Ici :
le symbole [Train] de la gare « Conflans Fin d’Oise » est mal placé au milieu des jardins des maisons, mais je n’ai pas trouvé le calque correspondant sur https://www.openstreetmap.org
Merci.
Bonjour.
I think that is the name of the OpenStreetMap relation, specifically this one.
I might be wrong, and it could be completely something else, but I think mapy.cz is rendering the icon for the relation in an approximate centre of the relation area. Because that relation covers a wide area, that point where the icon appears happens to be the centre.
I don’t think there’s an error to fix here.
p.s. sorry, my French is a bit rusty, you can use the translation feature of the forum software:
Thanks for this explanation, I’ve understood that the [Train] icon is placed in the center of the zone, so there’s no technical error to correct, but it does create an information error for someone who doesn’t know the area, in fact for this station, two train lines intersect. Wouldn’t it make more sense in this particular case to create two zones rather than a single, one for each train platform, so that the icons would be centered on the train line and not in the center of a single zone for the two platforms in the gardens?
It might have worked better in theory, but have no idea why this had been mapped like that in the first place. I don’t know for sure, but perhaps officially the whole public transport area includes those two stations, and they are named the same, ¯\_(ツ)_/¯.
It’s true: when two train lines intersect, with a possible connection for passengers, the station has a single name for both lines. Is an area necessarily rectangular?
Where an area (that is not necessarily rectangular) has a name, it’s the maps themselves that decide where to put that name.
Different maps are made with different map technologies, and each map technology may offer the mapmaker a choice of algorithm for where to place the name. These might include “the geographic centre, which might not be in the area at all” and “within the area, and somewhat central”.
It’s up to the mapmaker to decide, of the options they have available, where to place the name. In this case that is mapy.cz so I would suggest asking them.
Here it’s not the location of the name but the location of the icon.
When I reported what I thought was an error to mapy.cz, they told me that they would report it to openstreetmap but that next time I should report it directly to openstreetmap.
It sounds like the helpdesk person you were talking to had been told by their boss to reduce the number of people calling their helpdesk. Lots of app providers do this (with a DWG hat on I’ve heard that story lots of times!).
To be fair, the OSM data is a bit confusing. There is a railway=station, a public_transport=station (on a different object, because “reasons”), and the previously mentioned public_transport=stop_area. However, the choice of which of those to show (and how to show them) is entirely down to mapy.cz and the tools that they’re using. There might be very good reasons that have led them to represent things the way that they do (based on “most stations in OSM”) but it’s absolutely their choice.
it would be genuinely interesting (and not just in a 
sort of way) to hear their side of the story - perhaps you can mention this forum topic to them?
I have just mentioned this forum topic to mapy.cz with a suggestion to make an exception for cases where two train lines cross at right angles: don’t define a single zone for the station, but one zone for each train line platform, so that you have two well-placed train icons.
I’ll let you know if I get a reply.
