openstreetmap
Keep `building` tag when changing the preset from building to substation
Agree, but this is rather a bug in the iD code handling the changes of presets (I've therefore moved it from the tagging repo): If the new preset includes a field for the old preset's tag, the tag should be preserved.
I think this is a duplicate of https://github.com/openstreetmap/iD/issues/5883 which (unfotunately) was closed and locked in Sept. 2019.
I have often observed iD users removing building tags from buildings when they have changed them to leisure=horse_riding. Of course, in almost all cases it makes not much sense to tag a building with leisure=horse_riding, but it also makes no sense to silently remove the building tag from a building. A better solution should be found .
EDIT/ADDITION: Instead of automaically removing a building tag you could add a warning/issue with some explanation and the options:
- remove the building tag
- extract the feature tags to a new node
- ignore this issue
This way the user would be aware of the problem and what will happen.
