Tag:waterway=milestone
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 waterway = milestone
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| Description |
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A landmark of stone or metal to indicate the distance traveled along a watercourse. 
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| Group: waterways |
| Used on these elements |
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| Useful combination |
| See also |
Status: de facto
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| Tools for this tag |
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Used for a distance marker along a waterway.
How to map
For the pole/board on the shore
To map the shield, draw a node 
and add the following:
- waterway=milestone
- river:waterway_distance=* - distance (in km)
- Optional seamark-tags:
- seamark:distance_mark:category=pole/board/unknown_shape
- seamark:type=distance_mark - OpenSeaMap/Distance_Marks
- seamark:distance_mark:distance=number
- seamark:distance_mark:units=kilometres/hectometres
For the virtual kilometer point in the river
Place a point directly on the way 
that represents the waterway and add the following:
- waterway=milestone
- river:waterway_distance=* - distance (in km)
- Optional seamark-tags:
- seamark:distance_mark:category=not_installed - virtual river kilometer
- seamark:type=distance_mark - OpenSeaMap/Distance_Marks
- seamark:distance_mark:distance=number
- seamark:distance_mark:units=kilometres
Tags to use in combination
- distance=* - the distance given on the plate (in km)
The signs with the river kilometers can be found left or right on the shore.
Rendering on OpenSeaMap
The black circles are the milestones or the hectometer stone (hm1), the colored circles are the virtual kilometer points.
See also
- river:waterway_distance=* - An object's position along a waterway. The distance is measured from the spring.
- A more detailed system for navigational use is defined in the Openseamap: OpenSeaMap/Distance_Marks
- seamark:type=distance_mark
- seamark:distance_mark:distance=number
- seamark:distance_mark:units=kilometres
Similar tags
for "modern" milestones
for "historic" milestones