private void AddNationPagesPins(Model3DGroup modelGroup, List <OxyColor> colors, AuthorCountry authorCountry, string name, Nation country)
        {
            int pagesCount = (int)authorCountry.TotalPagesReadFromCountry;
            int booksCount = (int)authorCountry.TotalBooksReadFromCountry;

            var    pagesLookup = (int)_countryToLogPagesLookUp[authorCountry.Country];
            var    maxPages    = _countryToLogPagesLookUp.Values.OrderByDescending(x => x).FirstOrDefault();
            double height      = (12.0 * (double)pagesLookup) / ((double)maxPages);

            if (height < 1.0)
            {
                height = 1.0;
            }

            GeometryModel3D countryGeometry =
                GetCountryOctahedronGeometry(country.Latitude, country.Longitude,
                                             height, colors[pagesLookup], booksCount, country.DisplayImage);

            modelGroup.Children.Add(countryGeometry);

            string label =
                string.Format("{0}\nLat/Long ( {1:0.###} ,{2:0.###} ) \nTotal Pages {3}",
                              name, country.Latitude, country.Longitude, pagesCount);

            TextVisual3D countryText =
                GetNationText(country, pagesCount, label, height);

            modelGroup.Children.Add(countryText.Content);
        }