diff --git a/Arrangement_on_surface_2/demo/earth/Aos.cpp b/Arrangement_on_surface_2/demo/earth/Aos.cpp
index 6bcf9253f63..220eb0f35b5 100644
--- a/Arrangement_on_surface_2/demo/earth/Aos.cpp
+++ b/Arrangement_on_surface_2/demo/earth/Aos.cpp
@@ -334,6 +334,9 @@ std::vector<QVector3D> Aos::ext_check(const Kml::Placemarks& placemarks)
     auto& d = vit->data();
     if (vit->data().v == false)
     {
+      std::cout << "-------------------------------------\n";
+      std::cout << vit->point() << std::endl;
+
       if (2 == vit->degree())
         ;//continue;
 
@@ -341,8 +344,8 @@ std::vector<QVector3D> Aos::ext_check(const Kml::Placemarks& placemarks)
       {
         auto p = vit->point();
         auto p2 = p.location();
-        std::cout << "deg-1 vertex = " << p << std::endl;
-        std::cout << "deg-1 vertex: " << std::boolalpha << vit->incident_halfedges()->target()->data().v << std::endl;
+        std::cout << "   deg-1 vertex = " << p << std::endl;
+        std::cout << "   deg-1 vertex: " << std::boolalpha << vit->incident_halfedges()->target()->data().v << std::endl;
       }
 
 
@@ -362,9 +365,12 @@ std::vector<QVector3D> Aos::ext_check(const Kml::Placemarks& placemarks)
       do {
 
       } while (++curr != first);
-
+    
+      std::cout << "\n";
     }
   }
+  Kml::Node n{ 180.0, -84.71338 };
+  std::cout << "Node itself = " << n.get_coords_3d() << std::endl;
   std::cout << "*** num created vertices = " << num_created_vertices << std::endl;
 
   std::cout << "-------------------------------\n";
diff --git a/Arrangement_on_surface_2/demo/earth/Kml_reader.cpp b/Arrangement_on_surface_2/demo/earth/Kml_reader.cpp
index 2ce959bf04c..89165c26ff9 100644
--- a/Arrangement_on_surface_2/demo/earth/Kml_reader.cpp
+++ b/Arrangement_on_surface_2/demo/earth/Kml_reader.cpp
@@ -16,14 +16,14 @@ bool Kml::Node::operator == (const Node& r) const
 }
 Kml::Vec3d Kml::Node::get_coords_3d(const double r) const
 {
-  const auto phi = qDegreesToRadians(lat);
-  const auto theta = qDegreesToRadians(lon);
+  const long double phi = qDegreesToRadians(lat);
+  const long double theta = qDegreesToRadians(lon);
   const auto z = r * std::sin(phi);
   const auto rxy = r * std::cos(phi);
   const auto x = rxy * std::cos(theta);
   const auto y = rxy * std::sin(theta);
 
-  return Vec3d{ x, y, z };
+  return Vec3d{ (double)x, (double)y, (double)z };
 }
 QVector3D Kml::Node::get_coords_3f(const double r) const
 {
@@ -120,6 +120,7 @@ Kml::Placemarks  Kml::read(const std::string& file_name)
         else if (name == "LinearRing")
         {
           // LinearRing is moved to the correct locations via other tags above
+         assert(*lring.nodes.begin() == *(--lring.nodes.end()));
         }
         else if (name == "coordinates")
         {
diff --git a/Arrangement_on_surface_2/demo/earth/Kml_reader.h b/Arrangement_on_surface_2/demo/earth/Kml_reader.h
index 76c74573ef7..d47c020152b 100644
--- a/Arrangement_on_surface_2/demo/earth/Kml_reader.h
+++ b/Arrangement_on_surface_2/demo/earth/Kml_reader.h
@@ -16,12 +16,21 @@ public:
   struct Vec3d
   {
     double x, y, z;
+
+    friend std::ostream& operator << (std::ostream& os, const Vec3d& v)
+    {
+      os << v.x << ", " << v.y << ", " << v.z;
+      return os;
+    }
   };
 
   struct Node
   {
     double lon, lat;
 
+    Node() : lon(-1111), lat(-1111) {};
+    Node(double longitude, double latitude) : lon(longitude), lat(latitude) {};
+
     bool operator == (const Node& r) const;
     Vec3d get_coords_3d(const double r = 1.0) const;
     QVector3D get_coords_3f(const double r=1.0) const;
diff --git a/Arrangement_on_surface_2/demo/earth/Main_widget.cpp b/Arrangement_on_surface_2/demo/earth/Main_widget.cpp
index ea9fe8cf8c5..11193e7b9b1 100644
--- a/Arrangement_on_surface_2/demo/earth/Main_widget.cpp
+++ b/Arrangement_on_surface_2/demo/earth/Main_widget.cpp
@@ -227,8 +227,8 @@ void Main_widget::initializeGL()
   else
   {
     // check the arrangement constructed from the GIS data-set
-    //auto created_vertices = Aos::ext_check(m_countries);
-    auto created_vertices = Aos::ext_check_id_based(m_countries);
+    auto created_vertices = Aos::ext_check(m_countries);
+    //auto created_vertices = Aos::ext_check_id_based(m_countries);
     m_vertices = std::make_unique<Vertices>(created_vertices);
   }