Key:content

content
Description
To describe the contents of a feature used to store materials.
Group: properties
Used on these elements
Documented values: 22
Requires
man_made=storage_tank or man_made=silo or man_made=bunker_silo
See also
substance=* resource=* fuel=* material=* crop=*
Status: de facto
content=* More details at taginfo
Tools for this tag
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The key content=* can be added to features used to store materials to declare the contents of the feature. It is commonly used with man_made=bunker_silo, man_made=silo and man_made=storage_tank.

Values

Tags	Description	Photo
content=water	Water.
content=drinking_water	Drinking water.
content=hot_water	Hot water.
content=rainwater	Rainwater.
content=wastewater	Wastewater . More general than sewage; e.g. includes industrial and agricultural waste.
content=sewage	Sewage.
content=slurry	Liquid manure/Slurry
content=manure	Manure.
content=silage	Silage.
content=oil	Oil.
content=fuel	Liquid fuels, i.e. gasoline, diesel or heating oil
content=gas	Generic tag for any gas.
content=natural_gas	Natural gas (mostly methane).
content=biogas	biogas.
content=LNG	Liquefied natural gas is natural gas (predominantly methane with some mixture of ethane) that has been cooled down to liquid form.
content=LPG	Liquefied petroleum gas refered simply as propane and butane.
content=ngl	Natural Gas Liquids (condensate) like ethane, propane and butane.
content=propane	Propane.
content=oxygen	Oxygen.
content=nitrogen	Nitrogen.
content=liquid_nitrogen	Liquid nitrogen.
content=hydrocarbons	Hydrocarbons (generic tag).
content=chemicals	Chemicals.
content=cement	Cement.
content=grit	Grit.
content=wine	Wine.
content=beer	Beer.
content=crop	Crop. Also add crop=*
content=grain	Grain.
content=salt	Salt.
	More values can be found at taginfo

Avoid tagging something with content=unknown. It's better to wait until the actual content is surveyed.

Possible mistakes

Both contents=* and storage=* tags are in usage. As the semantic difference is insignificant, it is recommended to focus on content=* used by the majority of mappers.

contents=*

More details at taginfo

More details at taginfo

• contents=*🔎 ‒ Consider to use content=* instead. 📈

If you know places with this tag, verify if it could be tagged with another tag.
Automated edits are strongly discouraged unless you really know what you are doing!

storage=*

More details at taginfo

More details at taginfo

• storage=*🔎 ‒ Consider to use content=* instead. 📈

If you know places with this tag, verify if it could be tagged with another tag.
Automated edits are strongly discouraged unless you really know what you are doing!

See also

• substance=* - similar key, used for pipelines and related facilities
• inscription=* for textual content on signs
• capacity=* for the size of a storage facility