Geometry Boost List: [ggl] serialization and hash

Subject: [ggl] serialization and hash
From: Barend Gehrels (barend.gehrels)
Date: 2010-08-16 03:47:50

Hi again,

Richard Ulrich wrote:
> To fully use point_ll_deg with boost::serialize, std::find and
> boost::unordered_set, I have a header file with the following:
>
> Is serialization planned to be included in boost::geometry itself?
>   
It has not been discussed until now but it is undoubtly useful. Thanks 
for your code.

Yes, I think it will be there in the future, but I'm concentrating now 
on other things (documentation, reversed polygons, etc) to get it 
finalized for inclusion, which is more work than expected, and I can't 
do it fulltime.

However, we could add it in the extension folder. I personally do not 
have experience yet with Boost.Serialize, but based on your code:
- it might be better to reverse lat and lon, I think that in case we 
support it, it might be a template of point<...>, storing coordinates in 
0,1,2 order of course, and that is defined as lon,lat order (or it might 
be forward to the Point Concept giving the same order).
- the == comparisons of doubles might fail in some cases.

Regards, Barend