Hi, I think that it's critical that work done by users up to now is not erased or corrupted by a bulk upload of data. Therefore the new Tiger data should not relpace users data nor should it be placed on top of, underneath, or intertwined with the current users data.
Ideally, if a tile has been updated by a user then no bulk uploading should be done into this tile. Where there is a large area of "unimproved" Tiger data then the new data could be inserted, although you would then need to stitch the new Tiger ways to the old Tiger ways around the perimeter. Another alternative could be to freeze updates to the US, copy out all tiles modified by users, put in the new Tiger data in its entirety, then put back the users tiles, replacing the Tiger tiles, thus preserving ALL user editing. Then when someone wanted to work on a new Tiger tile they may also need to stitch the ways around the edges. Nick
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