[HOT] digitization of buildings

[Dan Marsh]

Most buildings are rectangular, near enough.  Sometimes the satellite
imagery is distorted due to steep slopes and the photo stitching process,
and this can make buildings look diamond-shaped.  Not so much in the
Philippines because the terrain is fairly flat.

Most homes in the Philippines have corrugated steel roofs, meaning the
roofs will be rectangular because the corrugated sheets are exactly
rectangular, at least when they were new.


On 14 November 2013 17:09, Justin Prud'homme <justin.prudhomme at gmail.com>wrote:

> Thanks for sharing. So we should be trying to represent buildings using
> square or rectangular shapes, even if the buildings aren't necessarily like
> that?
>
> Thanks,
>
>
> On Thu, Nov 14, 2013 at 11:56 AM, Nirab Pudasaini <
> developer.nirab at gmail.com> wrote:
>
>> Here is a cheat sheet containing howto on using the building plugin and
>> also the keyboard shortcuts that make the work lot faster. Hope this helps.
>>
>>
>> https://docs.google.com/document/d/1JkiL8wlvJqdVMgGxKXPzF22YzQ-S08Q31zZQna9CTMk/
>>
>>
>> On Tue, Nov 12, 2013 at 3:07 PM, frmoine <frmoine at gmail.com> wrote:
>>
>>>  digitization of buildings Bing pre-Image:
>>>
>>> I have noticed on some areas that people put a big polygon borders areas
>>> over several buildings.
>>>
>>> Let me remind you that building is unique ( base on roof color,
>>> shadow)  and in most case it is either rectangular or square. So no
>>> trapeze or bizzare form.
>>>
>>> The zoom scale may be less than 30 m depending on the quality of the
>>> image
>>>
>>> Take josm building tool and also the building continues under the trees.
>>>
>>> thank you in advance, I'm not in *the* *quality control* *team*, but if
>>> we can save their time, in this important task.
>>>
>>> In any case it is amazing work done so far, well done, all the best and
>>> continue to help
>>>
>>> FredM OSM contributor
>>>
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>>>
>>>
>>
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-- 
Dan Marsh
http://www.dm-photographics.com
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