Geometry Boost List: Re: [geometry] Distance between point_ll and polygon in 1.56

Subject: Re: [geometry] Distance between point_ll and polygon in 1.56
From: Menelaos Karavelas (menelaos.karavelas_at_[hidden])
Date: 2014-08-11 09:49:33

Hi Braminir.

On 10/08/2014 08:52 ??, Branimir Betov wrote:
> I did some more experimentation and seems like distance between point 
> and a polygon only works for Cartesian coordinates. I tried spherical, 
> sperical_equatorial, and geographic - none work, but Cartesian 
> compiles fine and returns a distance.
>
> I guess some specialization is missing, but I am not sure how to solve it.
>
>

I tried your example program with both 1.55 and 1.54 and I could not get 
it to compile. Maybe it is my setup, and will try again.

It is true, however, that for spherical_equatorial your program should 
work, but it doesn't (it was indeed working with 1.55).
I have spotted the problem, and I am working towards a solution.

I suggest that you create a ticket on trac about this, so that we can 
take it from there.
Here is the link for the trac system: https://svn.boost.org/trac/boost/
Follow the link for submitting patches, bug reports and feature requests 
at the top of the page. This will let you create a new ticket.

Best,

- m.

>
>
>
> On Sat, Aug 9, 2014 at 9:07 AM, Branimir Betov <bbetov_at_[hidden] 
> <mailto:bbetov_at_[hidden]>> wrote:
>
>     Here is the full example I came up with. I am using visual studio
>     (tried 2010, 2012, and 2013). For completeness I am attaching a
>     file with the polygon definition (test.txt).
>
>     #include "stdafx.h"
>     #include <string>
>     #include <fstream>
>     #include <streambuf>
>     #include <boost/geometry.hpp>
>     #include "boost/geometry/geometry.hpp"
>     #include <boost/geometry/extensions/gis/latlong/point_ll.hpp>
>     #include <boost/geometry/io/io.hpp>
>
>     namespace bg = boost::geometry;
>     using namespace std;
>
>
>     typedef bg::model::ll::point<> point;
>     typedef bg::model::polygon<point> polygon;
>
>     int _tmain(int argc, _TCHAR* argv[])
>     {
>         polygon poly;
>         std::string str;
>
>         std::ifstream t("c:\\temp\\test.txt");
>
>         t.seekg(0, std::ios::end);
>         str.reserve(t.tellg());
>         t.seekg(0, std::ios::beg);
>
>         str.assign((std::istreambuf_iterator<char>(t)),
>             std::istreambuf_iterator<char>());
>
>
>         bg::read_wkt(str, poly);
>
>         const bg::latitude<double> lat_out(37.69311);
>         const bg::longitude<double> lon_out(-122.13865);
>         point p_out(lat_out, lon_out);
>
>         bg::distance(poly, p_out); // This fails to compile for some
>     reason.
>
>         return 0;
>     }
>
>
>
>
>     On Sat, Aug 9, 2014 at 12:12 AM, Menelaos Karavelas
>     <menelaos.karavelas_at_[hidden]
>     <mailto:menelaos.karavelas_at_[hidden]>> wrote:
>
>         Hi Branimir.
>
>
>         On 09/08/2014 05:26 ??, Branimir Betov wrote:
>>         Hi,
>>
>>         I am trying to figure out what is wrong with my code and am
>>         stuck, so I thought someone might help. The code used to work
>>         in 1.55 and in 1.56 no longer compiles; I am at a loss what
>>         might be wrong. I am using the GIS extension from the
>>         develop-1.56 branch.
>>
>>         Here is the relevant snippet:
>>
>>             typedef bg::model::ll::point<> point;
>>             typedef bg::model::polygon<point> polygon;
>>
>>             polygon poly;
>>
>>             bg::read_wkt(str, poly);
>>
>>             const bg::latitude<double> lat_out(37.69311);
>>             const bg::longitude<double> lon_out(-122.13865);
>>             point p_out(lat_out, lon_out);
>>
>>             bg::distance(p_out, poly); // It fails to compile right
>>         here.
>>
>>
>>         Does anyone have any suggestions?
>>
>
>         Would it be possible to provide a minimal complete example
>         that fails?
>
>         Thanks a lot.
>
>         - m.
>
>
>>         Thank you,
>>         Branimir
>>
>>
>>
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>
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