man_made=silo is not being rendered

[ThomasA]

I recently changed a lot of silos and storage tanks along Aalborg Harbour from building=yes to man_made=silo and man_made=storage_tank, because I find that a more accurate reflection of what is actually there. However, now they are no longer rendered on openstreetmap.org. Why does it not render these - physically quite prominent - features?

[kocio-pl]

#588 was closed, but can be reopened (see also #372). Please change name of this ticket to drop man_made=silo, so the tickets don't overlap.

For every such object we need an idea how should they be rendered. Do you have one?

[ThomasA]

Sorry, didn't see that issue...

[dieterdreist]

2017-10-26 10:53 GMT+02:00 Thomas Arildsen <notifications@github.com>:

I recently changed a lot of silos and storage tanks along Aalborg Harbour from building=yes to man_made=silo and man_made=storage_tank, because I find that a more accurate reflection of what is actually there. However, now they are no longer rendered on openstreetmap.org. Why does it not render these - physically quite prominent - features?

IMHO you shouldn't replace tagged properties ("is a building in OSM") with different properties, if both apply. You can keep the building tag (or replace it with a more accurate value like "silo") and still add the man_made tags. Obviously only in case, the tagged objects are considered buildings in OSM (to see this, I'd ask on the tagging list, look up the wiki _and taginfo_).

[matkoniecz]

I suspect that silos should also have a building tag, so special rendering support is not necessary.

[matkoniecz]

I propose to close this issue and reopen it if there are man_made=silo objects that should not be tagged as building.

[matkoniecz]

If there are man_made=silo where building tag is wrong it would be a good idea to give example (with photo) at https://wiki.openstreetmap.org/wiki/Tag%3Aman_made%3Dsilo

In my very limited experience building tag is applicable for such structures.

[kocio-pl]

I reopen this as I made a mistake closing this - bunker silo needs a different visual representation probably and I think silo is closer to storage tank (closed space), see the proposition for rendering them: #588 (comment).

[matkoniecz]

I reopen this as I made a mistake closing this

Do you have any example of object correctly tagged with man_made=silo where adding also building=silo would be wrong?

[kocio-pl]

I don't have an example on the map, but I think the example provided here would not classify as a building, while still being a storage of some kind: #588 (comment).

[eigenwillig]

Silos are more structures than buildings. If we accept that there is a separate tag for storage tanks (with man_made) the same should apply for silos!

[Tomasz-W]

As silos are very similar to storage tanks outside (the difference between them is about what is inside - silos are for bulk materials and storage tanks are for liquids), I think both tags could be rendered with the same icon:

related to #588

[eigenwillig]

Another argument for not using building=silo:

Storage tanks are never made from concrete, while silos are made from either steel (esp. North America / grains) or concrete.

[matkoniecz]

@Tomasz-W

I am not convinced that icon is a good idea, I would just render them like building=*

Another argument for not using building=silo:

I have no idea why this is relevant for either

• whatever building=silo is a good idea (we already established that at least some silo are not taggable with building=silo)
• I have no idea why construction material is relevant to using building tag (there are building made both from reinforced concrete and steel)

[matkoniecz]

@Tomasz-W

I am not convinced that icon is a good idea, I would just render them like building=*

@eigenwillig

Another argument for not using building=silo:

I have no idea why this is relevant for either

• whatever building=silo is a good idea (we already established that at least some silo are not taggable with building=silo)
• I have no idea why construction material is relevant to using building tag (there are building made both from reinforced concrete and steel)

[kocio-pl]

Since they are located outside city centers, I guess we could also render icon on high zoom, like z18+, since this is information which will not clutter space. However rendering them like buildings by default seems fine to me. People use building tags for very different structures, like silos or monuments, so it looks like intuitive enough.

[dieterdreist]

sent from a phone

On 18. May 2018, at 12:30, kocio-pl ***@***.***> wrote: Since they are located outside city centers, I guess we could also render icon on high zoom, like z18+, since this is information which will not clutter space. However rendering them like buildings by default seems fine to me. People use building tags for very different structures, like silos or monuments, so it looks like intuitive enough.

what could be an argument for rendering an icon is that they are usually tall structures and can serve as landmarks.

[Tomasz-W]

Gist link: https://gist.github.com/Tomasz-W/4ebcb87699e6442d696f9c06ce16c31f