[Talk-us] Should I realign TIGER data to Yahoo areal imagery?

SteveC steve at asklater.com
Thu Jul 3 18:35:41 BST 2008


On 3 Jul 2008, at 09:40, Alex Mauer wrote:

> SteveC wrote:
>> short answer - YES :-)
>
> Slightly longer answer: Yes, but be careful.  In many places the Yahoo
> aerial imagery is offset from real life by some amount (I've heard 30
> meters up to 1km in some cases).  So if an area looks totally  
> different
> from what's on the ground, correcting to match Yahoo! is OK.   But if
> it's just shifted in one direction, then don't correct it without  
> first
> verifying with a GPS track that the Yahoo! imagery is correct.

Yeah so I guess what I was really saying is that Yahoo is mostly  
vastly better than TIGER, even if it is off a bit occasionally.


>
>
> -Alex Mauer "hawke"
>
>
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Best

Steve





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