[Talk-us] How accurate is Tiger data vs Yahoo Aerial?

[Dave Hansen]

On Fri, 2008-02-22 at 12:23 -0800, am12 at bolis.com wrote:
> Hi-  I've just joined up and I'd like to help out cleaning up the map for
> my area in Beaverton/Portland Oregon.
> 
> It looks like it is completely covered already by the Tiger data.  But
> I've noticed many displacement problems where the Tiger data doesn't line
> up with the Yahoo aerial photos.

Hey!!  Another Portland mapper!!

I see the same displacement of the TIGER data.  Some of it is really
bad.  Cornell road out by my house:

http://www.informationfreeway.org/index.php?lat=45.53651932780694&lon=-122.89710601634569&zoom=15&layers=0000F0B0F

was about 100 yards off, and *RIGHT* on top of another road.  It was
really confusing to look at those traces.

-- Dave