Boost logo

Geometry :

Subject: Re: [geometry] Integrating OGR library with Boost.Geometry
From: Eric MSP Veith (eveith_at_[hidden])
Date: 2015-05-22 04:39:41

Hello Menelaos,

thanks for your reply!

On Friday 22 May 2015, 08:42:58, Menelaos Karavelas wrote:
> I cannot really tell what the problem is but there is one thing that I
> think needs investigation:
> Please make sure that you have correctly defined the specializations
> required by Boost.Range. It seems that you are missing the
> range_mutable_iterator specialization. See
> ending.html for the details.

Doesn't range_mutable_iterator mean that the return type of the iterator's
dereference operator is a modifiable reference? If so, I cannot do this due to
the OGRLineString's API. :-/

Please correct me if I'm mistaken here; I'm by no means an expert in C++ STL-
conformant iterator design.

> Another thing: would it be possible to also try with boost 1.58? It
> would be helpful to know if the problem persists there.

Just upgraded to Boost 1.58.0. I used a different machine to make sure there
are no leftovers that interfer on the original machine. Same problem, sadly.

> >
> > bg::distance(bls1, bls2),
> > bg::distance(*ls1, *ls2));
> >
> >
> > bg::distance(*ls1, *ls2),
> > ls1->Distance(ls2));
> Which one(s) of the three tests above fail? All of them? Just the second?

These two both fail. From that I conclude that (a) the OGRPoint adapter to
Boost.Geometry works, since I can successfully use bg::distance with my
`typedef bg::model::linestring<OGRPoint> boostLinestring` linestring. However,
the OGRLineString version uses my iterator code and fails. So the only bug
that can be found here is most probably in my own iterator code.


Geometry list run by mateusz at