[information request] time period of source imagery

[nautique7]

Hi All,
Thanks to the team for developing such a useful set of data. I'm interested in using building footprints for Santa Clara County, CA and need a rough year estimate of the underlying source Bing imagery used to generate the footprints. Does anyone have suggestions on how I can track down the source imagery to generate an estimate of the time period these footprints represent?
Any tips would be greatly appreciated.
Thanks!
Jenny

[jonathan-g]

I would also find it very useful to know what time period these building footprints represent.

[MRDolman]

I am curious about this too. I have been looking for a temporal stamp for these data. I understand that the Bing Imagery is a composite of multiple sources, but knowing a range of years from which the footprints were produced would be really useful. Any details would be greatly appreciated.

[nikolatr]

It would be very complicated task to calculate/estimate this now, since we don't keep copy of the source Bing imagery, which has changed in the meanwhile. I would say the average vintage is close to 2012. We'll try to add a vintage tag for each binding from now on.

This month we plan to update ~75 million buildings in the area below where vintage is 2019+.