[OSM-talk] Church building rendering bug?

[M∡rtin Koppenhoefer]

2010/9/10 M∡rtin Koppenhoefer <dieterdreist at gmail.com>:
> 2010/9/10 Pieren <pieren3 at gmail.com>:
>>> Imagine someone would want to calculate all grass area (and everything
>>> would be mapped).
>>
>> This can be preprocessed (remove building area on the same layer).
>
>
> no, you cannot tell whether a building is supended, raised,
> underground or on the same level, if you don't map it correctly. Why
> should we encourage people to map wrong, and correct the errors with a
> certain probability in postprocessing, if we can also tell them how to
> do it right?

there could also be grass on the roof (green roof, begins to become
popular due to environmental advantages).

cheers,
Martin