Storage_tank with building or with man_made?

[anonymous]

We have
building=storage_tank (used 27k times) and
man_made=storage_tank (used 270k times) as well in internal preset.

So which one is preferred over another?

[anonymous]

Issue #11339 relevant.

[mkoniecz]

For storage tanks that are buildings: use both.

For storage tanks that are not buildings: only man_made=storage_tank

Note that about 94k man_made=storage_tank have building=yes rather than more detailed building=storage_tank ( ​https://taginfo.openstreetmap.org/tags/man_made=storage_tank#combinations ).

[anonymous]

How can I determine if something is a storage tank, but isn't a building? The top of the structure is open?

[mkoniecz]

I attempted to add example of building and nonbuilding storage tank at ​https://wiki.openstreetmap.org/wiki/Tag:man_made%3Dstorage_tank#Example

Review is welcomed.

[anonymous]

So it's a building=storage_tank if the bottom of the tank sits on the ground?

The funny thing is, that this specific tag not documented anywhere, although used 27k times.

[anonymous]

I'm the OP and after considering decided to close the issue.

The man_made=storage_tank still not well described, but it's the same scheme as building=school with amenity=school etc. One tag describes the structure of the building the other the function. At first sight it looks like a duplicate, but it isn't.

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So it's a documentation issue which belongs to the wiki, not JOSM.