[OSM-talk-fr] [OSM-talk] highway=* + area=yes vs area:highway=*

Jérôme Seigneuret jerome.seigneuret at gmail.com
Ven 10 Aou 12:20:33 UTC 2018


@djakk all object are area but that don't make sens use it in database
because data are an abstraction.

area is documented!

highway are in model linestring but in other context it is as an area so
highway area are forced with area=yes to map this object. there is no other
solution to set an highway as a linstring because you can't easily have a
good reprensentation with low level scale and can't map name correctly.
But for micro mapping and set more realistic area (use in zoom level 19, 20
for representation) and data analyse there is an other model and you can
join twice solution. It can be similar to interlis (suisse model)
reprensetion based on data abstraction multilevel. Same data have multiple
object type representation of your information with level scale definition.

database is just a container and store an abstraction of information with a
specific model. You can translate with same model or an other but there is
a limitation corresponding to you abstraction level. an highway is also a
3D reprensation with concrete layers, kerb, and sidewalk...

In other way you separete highway, cycleway, footway and other is there is
a separator but this is the same global 3D object but you need use vector
line and contrains for routing and it can use just in global polygon
object. in this base you need use polygon and line solution.

Other limitation is time cycle, number of contributors, resource
materials.... and you will do choices to add udpated data in time.

Jerome

Le ven. 10 août 2018 à 13:23, djakk djakk <djakk.djakk at gmail.com> a écrit :

> No, all highways are areas :) Mapping them as a line is a manual
> generalization ;)
>
>
> djakk
>
>
> Le ven. 10 août 2018 à 12:15, Andy Townsend <ajt1047 at gmail.com> a écrit :
>
>>
>> > So basing on your opinions, it looks like highway=* + area=yes isn't
>> incorrect, it's just not documented.
>>
>> I'd suggest that it depends what you're mapping. If it's a predominantly
>> linear feature then it would be wrong to try and "somehow record the width"
>> using area=yes on the highway tag - use area:highway (or width) for that.
>>
>> If it really is an area, then area=yes would make sense.  Most highways
>> are not, though.
>>
>> Best Regards,
>> Andy
>>
>>
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