I increased and it compile. However, I am -again- not able to continue, because now it says point not declared.. #include <boost/geometry.hpp> #include <boost/geometry/geometries/point.hpp> #include <boost/geometry/index/rtree.hpp> namespace bg = boost::geometry; namespace bgi = boost::geometry::index; template <int CompileTimeDimension> void do_something() { typedef bg::model::point<float, CompileTimeDimension, bg::cs::cartesian> point; bgi::rtree<point, bgi::linear<8> > rt; } template <std::size_t D, std::size_t N> struct fill { template <typename Point> static void apply(Point& p, typename bg::coordinate_type<Point>::type const& v) { bg::set<D>(p, v); fill<D + 1, N>::apply(p, v); } }; template <std::size_t N> struct fill<N, N> { template <typename Point> static void apply(Point&, typename bg::coordinate_type<Point>::type const&) {} }; int main() { int M; M = 100; if ( M == 100 ) do_something<100>(); else if ( M == 10000 ) do_something<10000>(); else std::cerr << "invalid dimension!"; point p; if ( M == 100 ) fill<0, 100>::apply(p, 5); else if ( M == 10000 ) fill<0, 10000>::apply(p, 5); else std::cerr << "invalid dimension!"; return 0; }