[Imports] Importing official Buildings/Addresses in Louisville KY

[Mike N]

On 1/31/2015 9:46 AM, Sander Deryckere wrote:
> Updatability can be achieved by adding an id to the imported objects
> (that id must be permanent in the source DB), but it's also possible
> without id when you develop algorithms to compare OSM data with the
> official data.

   An ID is not as useful as they might seem on first glance.   For the 
next round of import checking: there is a new ID which isn't in OSM. 
Was that building
   1.  ..Torn down and deleted from OSM?
   2.  ..Still present, but deleted by its owner looking for some sort 
of 'privacy'?
   3.  ..An erroneous extra building in the original database?

   There is also the case of newly created buildings in OSM and fully 
tagged by survey without an ID

   Object conflation ideally should occur on each import cycle.  Saving 
a copy of the original source data can help.   Then for the following 
import cycle, compare source data directly to get a direct list of 
changes from the source.