[postgis-devel] PostGIS 3D - Points to be discussed

[Nicklas Avén]

Hallo Olivier

Interesting things. I cannot say I see at once what it it all means, but
I have a question.

We were discussing this long time ago, but I don't think I have
understood yet :-)

In 3D when you talk about a solid. How is that defined. As I remember
you meant that it is a solid if it is closed. But I think that sounds
strange. It sounds like a closed linestring have to be a polygon. But it
dosn't. It can be just a border or just a "closed linestring". 

How do we flag that a closed surface is a solid and not just a "skin".

If discussing distances. The distance from the table to the wall might
be 2 meters. But if the house is to be regarded as a solid it is 0.0
meters.

I'm I thinking wrong or do we have to expand the 3D type(s) with some
solid type?

Regards

Nicklas



On Thu, 2013-01-31 at 21:09 +0100, Oliver Courtin wrote:
> 
> Hi alls,
> 
> 
> We spend time in 2012 to work on PostGIS 3D, and CGAL integration.
> 
> 
> Right now, we arrive to a first step in our developments, and PoC, 
> and we need to launch some discussions, on dev list, and with PSC, 
> to validate (or not) some of our initials choices.
> 
> 
> If we can progress on the mailing list, on theses questions, 
> in a quite near future, that's really fine.
> 
> 
> Either way, we will also be present, Hugo and mine, in Boston,
> if some points really need to be discussed faces to faces.
> 
> 
> So thanks in advance, to read and comment, on this mailing list:
> http://www.oslandia.com/tech/?p=1235
> 
> 
> 
> 
> O.
> 
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