Key:construction_date
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 construction_date
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| Description |
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Indicates the date the construction of the feature was finished. 
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| Group: annotations |
| Used on these elements |
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| See also |
| Status: in use |
| Tools for this tag |
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construction_date=* is one of several keys to indicate the date the construction of the feature was finished.
By far the most widely used key, however, is start_date=*.
Formatting
Usually the date is written in YYYY-MM-DD format according to 
ISO 8601. It is based on the Gregorian calendar.
In the vast majority of cases only the year is given.
See also
- start_date=* - Date when feature opened or the construction of the feature finished.
- end_date=* - This tag for an end-date is for special use only, not in main OpenStreetMap. - Read documentation and all warnings first! - Possible use is e.g. OpenHistoricalMap.
- opening_date=* - Expected date in the future when a construction will be finished and feature will be opened. Use YYYY-MM-DD format.
- year_of_construction=* - Displays the year(s) of construction of a characteristic and can be assigned to different objects.
- taginfo '_date' search
- Comparison of life cycle concepts
- OSM-4D for ideas about a viewer showing features in 3D extended over time.