|Definition:||A way is marked with trailblazes|
Provide a simple boolean property to classify a trail as being marked, wikipedia:Trail_blazing. This is to provide a simple tagging scheme, not competing with the symbol, colour attributes to Relation:route.
We need a simple tagging scheme, as several trails may not necessarily be part of a given route. Some regions may have a standard convention for marked hiking trails that may or may not be part of a route network, but not a specific route itself.
The proposal intends to replace the simple uses of Proposed features/Marked trail, but not to describe route specific trailblazing of routes, as these can be covered by Relation:route where colour=* and symbol=* can be used to describe route specific trail blazes.
Such simplified tagging will make implementation of consistent looking hiking maps easier.
Usage, Tags and Values
Marked trails are often indicated on maps with various visual methods:
- Red lines or blue dots (conventions used in Norway).
- Colored lines - Purple markings == purple line on map (convention in USA)
- marked_trail=* or any other tagging scheme is not established or widely used.
- implementation of marked_trail=* and relation:route:colour is combersome.
- maps implementing the actual colours and shapes may be noisy, and not generic.
- marked_trail="colourname" are insufficient in occurences where specialized trail blazes are made for a given route, which are more suitably mapped as a relation.
Numbers for related tagging schemes from osmdoc at the time of writing, (#ways/#relations, dominating country/region):
- marked_trail=*: 1411 / 15, Austria, Slovakia
- trailblazed=yes: 1167 / 0, Slovenia, Norway
- marked_trail=blue: 1076 / 6, Norway
- marked_trail_blue=yes: 1303 / 12, Slovakia, Poland
- osmc:symbol=*: 42 / 1894, France, Germany, Switzerland
- color=*: 72 / 298
- symbol=*: 209 / 3348, Alps (German speaking)