Hi Alev, alev mutlu wrote On 11-5-2014 14:16:

Hi all,

I have the following code. I can correctly print the content of line_smp with boost::geometry::dsv but get strange results when I copy line_smp into a vector and then print the content of the vector.

Any ideas on what I am doing wrong?

bg::model::d2::point_xy p; while(rs->next()){ bg::set<0>(p, i); bg::set<1>(p, rs->getDouble("num")); i++; line +=p; } boost::geometry::simplify(line, line_smp, 0.3);

std::cout<< " original:" << boost::geometry::dsv(line) << std::endl << "simplified:" <<boost::geometry::dsv(line_smp) << std::endl;

std::vector<xy> v; v.clear(); std::copy(line_smp.begin(), line_smp.end(), std::back_inserter(v));

stringstream sa, ssa; for(int ia = 0; ia < v.size(); ia++){ sa << bg::get<1>(v[i]); cout<< sa; sa.str(""); }

Hard to say, basically the procedure seems OK. I see several things: - line type is not included in your fragment, what does += for example? - point type is point_xy or xy? - you print v[i] while your loop variable is ia (this is probably the reason for strange results) HTH, Barend