https://openstreetmap.org/copyright | https://openstreetmap.org |
Copyright OpenStreetMap and contributors, under an open license |
https://openstreetmap.org/copyright | https://openstreetmap.org |
Copyright OpenStreetMap and contributors, under an open license |
Welcome to OSM! You know how the building looks like and/or can visit it again to have a look at its proportions? Fine! :-)
How-to with the default editor: log in, click "edit", draw an area where the building is and then select building on the left side. Then "save" and please enter a comment describing what you did and what your source for this is. An advanced step (maybe later) would be to add a so-called "source tag" to the building itself to tell fellow mappers that this building is just estimated.
Just try it! Tell us here if you succeeded or need further help.
Added 13 days ago https://www.openstreetmap.org/way/482913998 . Minor building details would be a bonus, still.