Thanks for the tip! I will keep that in mind when re-iterating, correcting 
previous work.

Sent from my iPhone

> On 12 Jun 2015, at 12:15, Florian Lohoff <f...@zz.de> wrote:
> 
>> On Fri, Jun 12, 2015 at 10:56:30AM +0100, SomeoneElse wrote:
>>> On 12/06/2015 10:16, Arne Jakobsson wrote:
>>> Hi all,
>>> I draw buildings, and was taught somewhere that we should align
>>> the building outline with its roof. Doing this, I ran into some
>>> trouble. http://i.imgur.com/vaOFIb5.gif
>>> The road intersect the building. This would not happen if we
>>> instead just kept to aligning the building outline with its base.
>>> Is there a right way to do this?
>> 
>> Personally I always try and align building footprints with the base
>> rather than the roof (otherwise very tall buildings would look very
>> odd indeed).
>> 
>> I can see why (if you were mapping lots of small buildings in e.g. a
>> HOT response) it would be easier to say "just trace the roofs" -
>> it'd get more buildings traced quickly at a good enough quality
>> (which surely is the aim there), but as a general principle where
>> time isn't an issue I'd certainly try and trace the building
>> footprint.
> 
> As the parallax-shift is the same for the full of the sat image you can
> also draw 100 Buildings and shift them at once 
> 
> Just make shure that you are not shift already shifted buildings or
> buildings taken from images with a different parallax problem.
> 
> Flo
> -- 
> Florian Lohoff                                                 f...@zz.de
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