Tag:barrier=wall
 barrier = wall
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A freestanding structure, designed to restrict or prevent movement across a boundary, typically made from solid brick, concrete or rocks, and almost always built so that it is opaque to vision. 
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| Group: barriers |
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Status: approved
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The tag barrier=wall is used to map a wall: a freestanding structure, designed to restrict or prevent movement across a boundary, typically made from solid brick, concrete or rocks, and almost always built so that it is opaque (cannot be seen through).
Also see barrier=fence for fences, barrier=retaining_wall for retaining walls, and barrier=city_wall for town walls.
How to map
Create a line 
(way) and add the tag barrier=wall
Additional tags
wall=*is used to describe the principle feature of the wall, which might be the type, purpose, or building material of the wallheight=*is used to specify how tall the wall is.width=*is used to specify the thickness of the wall. Alternatively, useest_width=*to specify approximately how thick the wall is.material=*is used to define the material the wall is constructed of: stone, brick, concrete, wood, etc.colour=*is used to define the colour of the wall
For historic walls the tag historic=wall can be used. If it is under preservation see heritage=*.
Mapping as an area
It is also possible to map a wall as an area 
. Then draw the basic area of the wall and add area=yes.
Further tagging
There are situations a wall is on top of a building or another wall - e.g. noise protection wall on top of a building. Then use key min_height=* for the start height of the wall.
The construction material can also be tagged with material=*, if necessary, using values like
stone, brick, concrete, or wood.
See wall=no for tagging of open buildings from an import in France.
Related tags
barrier=city_wall- town or city defensive wallsbarrier=retaining_wall- a retaining wall, where the ground level is higher on one sidebarrier=fence- for lighter barriers, possibly see-through and made of wood or wire.barrier=gate- a section in the wall which can be openedbarrier=entrance- an open gap in the wall