On Jan 6, 2013, at 12:06 PM, Mike N <nice...@att.net> wrote:

> On 1/6/2013 11:37 AM, Mike N wrote:
>> I like the idea of a TIGER 07 vs 12 comparison only being used as a
>> trigger.   If you compare TIGER 12 vs OSM, it will highlight all the
>> TIGER 07 artifact roads that were removed because they were in error or
>> no longer exist, but are still often in TIGER 12 even after a geometry
>> refresh.
> 
> On second thought, you'd need a 3-way compare to further exclude new TIGER 12 
> features that have already been added to OSM.

More data to process but an overlay/intersect approach could still work for ZL 
10+.

> 
> 
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Alex Barth
http://twitter.com/lxbarth
tel (+1) 202 250 3633





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