[Tagging] Deprecate water=pond?

Chris Hill osm at raggedred.net
Wed Nov 11 13:07:57 UTC 2020

On 10/11/2020 05:26, Joseph Eisenberg wrote:
> The tag water=pond was added with a large number of other types of 
> "water=*" in 2011, but it has a poorly defined description.
> "A pond <https://en.wikipedia.org/wiki/Pond>: a body of standing 
> water, man-made in most cases, that is usually smaller than a lake. 
> Salt evaporation ponds should be tagged with landuse 
> <https://wiki.openstreetmap.org/wiki/Key:landuse>=salt_pond 
> <https://wiki.openstreetmap.org/wiki/Tag:landuse%3Dsalt_pond>, 
> open-air swimming pools — with leisure 
> <https://wiki.openstreetmap.org/wiki/Key:leisure>=swimming_pool 
> <https://wiki.openstreetmap.org/wiki/Tag:leisure%3Dswimming_pool>."
> So it might be artificial, like a landuse=reservoir or 
> water=reservoir, but smallish. Or it might be natural like a 
> water=lake, but smallish. However, nothing on the water=lake page 
> defines a lower limit for the size of a lake.
> This is a shame, because all the other values of water=* are clearly 
> defined as only natural, or only artificial, and waterway=* features 
> are also clearly divided. Furthermore, the original lags 
> landuse=reservoir and landuse=basin were also clearly artificial, 
> while lakes were natural.
> But the biggest problem is that there is no way to define a lower size 
> for a lake or reservoir, or an upper size for a pond. And the size of 
> the area is easier available from the geometry of the feature, so it 
> doesn't need to be mentioned in the tag.
> I think the best option is to deprecate water=pond and suggest using 
> water=lake for natural lakes, even small ones, and use water=reservoir 
> or water=basin (or landuse=reservoir or =basin if you prefer) for the 
> artificial ones.
> -- Joseph Eisenberg
> -- 

This doesn't seem like a good idea to me. The boundary between a lake 
and a pond may be hard to measure sometimes, but that doesn't mean it is 

If we squash detail from tagging we are left with nothing. Maybe we 
should just tag everything as thing=yes?

Chris Hill (chillly)

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