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

Anthony osm at inbox.org
Tue Dec 28 13:20:25 GMT 2010


On Tue, Dec 28, 2010 at 7:54 AM, Anthony <osm at inbox.org> wrote:
> 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?
>
I guess someone already thought of this enough to write a paper
(Correction of Building Height Effect Using LIDAR and GPS):
http://www.springerlink.com/content/2ec84ckpcf2gnt67/



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