[Tagging] Layers (was Eruvs etc.)

[Peter Elderson]

True. A relational or "layering" setup has pros and cons. In general, people understand the flat setup with the basic types nodes, ways and areas (further detailed by attribute tags) better then a setup with multiple node types, way types and area types whose base attributes are defined by the layer they are assigned to. The issues with interconnecting nodes, ways and objects exists in both setups.

Fr Gr Peter Elderson

> Op 7 sep. 2022 om 23:15 heeft Marc_marc <marc_marc at mailo.com> het volgende geschreven:
> 
> Le 07.09.22 à 22:21, Greg Troxel a écrit :
> about GIS
>> When editing, often people turn on "snapping" so that positioninng a
>>   point object or a vertex of a line/polygon will result in exact match
>>   of an object in some other layer.
> 
> it seems it solves little or nothing compared to what is already possible in josm:
> 2 layers have a node at the same position, e.g. the entrance to the underground parking under a shopping centre
> tomorrow someone realigns the roads in the relevant layer:
> - if the system has stored that it is a shared between 2 layers, the car entrance ends up at a twisted location in the building layer
> - if the system has not stored that it is a shared position, then the road no longer reaches the building
> 
> 
> 
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