Ahh, if only we had a 'national cadastral database'...
No, instead we have a very limited series of copyright-protected maps by a company called Sanborn that was hired to do this style map from 1867 to 2007 for fire insurance companies - but not in every town and city, not regularly, and rarely for rural areas.
On top of that we have 3100 county-like bodies which will each tend to have a local plat map of who owns which properties (which will occasionally mark buildings), in varying stages of digitization and privatization (some of them charge ridiculous amounts, some are public access).
We also have an irregularly updated USGS quad dataset that is not very precise, and doesn't attempt either building shape or urban areas.
Lastly, there are modern aerial-collection LIDAR returns that tend to produce high accuracy building corner references.
No, instead we have a very limited series of copyright-protected maps by a company called Sanborn that was hired to do this style map from 1867 to 2007 for fire insurance companies - but not in every town and city, not regularly, and rarely for rural areas.
On top of that we have 3100 county-like bodies which will each tend to have a local plat map of who owns which properties (which will occasionally mark buildings), in varying stages of digitization and privatization (some of them charge ridiculous amounts, some are public access).
We also have an irregularly updated USGS quad dataset that is not very precise, and doesn't attempt either building shape or urban areas.
Lastly, there are modern aerial-collection LIDAR returns that tend to produce high accuracy building corner references.