[OSM-talk] protocol for adding buildings using aerial imagery?

[Anthony]

On Tue, Dec 28, 2010 at 3:59 AM, Milo van der Linden <milo at dogodigi.net> wrote:
>>
>> It would be interesting to have editor support for estimating the building
>> height depending on that displacement, or depending on the extent of the
>> shadow - that would have to be calibrated for each imagery and location of
>> course but so does the displacement of the whole image, and we're seeing
>> people working on the latter...
>>
>
> This will result in a very rough estimate. Estimating height from
> displacement is only possible if you have stereo-photo's with at least
> 60% overlap or when you know every photograhic detail like focal
> length, photo-centerpoint and so on. You cannot accuratly estimate
> height from displacement in constructed mosaics.

What about LIDAR?  Does LIDAR capture building heights, or only
heights of green areas?