diff --git a/include/doorkeeper/components/basemapsource.hpp b/include/doorkeeper/components/basemapsource.hpp
index 1de08c4..053a04a 100644
--- a/include/doorkeeper/components/basemapsource.hpp
+++ b/include/doorkeeper/components/basemapsource.hpp
@@ -3,14 +3,23 @@
 
 #include "doorkeeper/implem/maptypes.hpp"
 #include "doorkeeper/primitivetypes.hpp"
+#include "doorkeeper/implem/coords_utils.hpp"
 #include <cstdint>
 #include <vector>
 #include <string>
+#include <type_traits>
 #include <cstddef>
 
 namespace dk {
+	namespace implem {
+		template <typename T, uint32_t D, bool POD=std::is_pod<T>::value>
+		class data_fetcher;
+	} //namespace implem
+
 	template <uint32_t D>
 	class BaseMapSource {
+		template <typename T, uint32_t, bool POD>
+		friend class implem::data_fetcher;
 	public:
 		typedef dk::Vector<D> coords;
 		BaseMapSource ( void ) = default;
@@ -30,4 +39,6 @@ namespace dk {
 	};
 } //namespace dk
 
+#include "doorkeeper/implem/basemapsource.inl"
+
 #endif
diff --git a/include/doorkeeper/implem/basemapsource.inl b/include/doorkeeper/implem/basemapsource.inl
new file mode 100644
index 0000000..3d0bb9b
--- /dev/null
+++ b/include/doorkeeper/implem/basemapsource.inl
@@ -0,0 +1,38 @@
+namespace dk {
+	namespace implem {
+		template <typename T, uint32_t D>
+		class data_fetcher<T, D, true> {
+		public:
+			typedef typename BaseMapSource<D>::coords coords;
+			static void fetch ( std::vector<T>& parOut, const coords& parFrom, const coords& parTo, std::size_t parCount, BaseMapSource<D>& parMapSrc ) {
+				parOut.resize(parCount);
+				parMapSrc.fetch_raw(reinterpret_cast<char*>(parOut.data()), parFrom, parTo, sizeof(T) * parCount);
+			}
+		};
+		template <typename T, uint32_t D>
+		class data_fetcher<T, D, false> {
+		public:
+			typedef typename BaseMapSource<D>::coords coords;
+			static void fetch ( std::vector<T>& parOut, const coords& parFrom, const coords& parTo, std::size_t parCount, BaseMapSource<D>& parMapSrc ) {
+				parOut.reserve(parCount);
+				DK_ASSERT(false); //not implemented
+				(void)parOut;
+				(void)parFrom;
+				(void)parTo;
+				(void)parMapSrc;
+			}
+		};
+	} //namespace implem
+
+	template <uint32_t D>
+	template <typename T>
+	void BaseMapSource<D>::fetch (std::vector<T>& parOut, const coords& parFrom, const coords& parTo) {
+		const auto tile_count = tile_volume(parFrom, parTo);
+		const std::size_t casted_tile_count = static_cast<std::size_t>(tile_count);
+		DK_ASSERT(static_cast<decltype(tile_count)>(casted_tile_count) == tile_count);
+
+		parOut.reserve(casted_tile_count);
+		parOut.clear();
+		implem::data_fetcher<T, D>::fetch(parOut, parFrom, parTo, casted_tile_count, *this);
+	}
+} //namespace dk
diff --git a/include/doorkeeper/implem/coords_utils.hpp b/include/doorkeeper/implem/coords_utils.hpp
new file mode 100644
index 0000000..f9dd44d
--- /dev/null
+++ b/include/doorkeeper/implem/coords_utils.hpp
@@ -0,0 +1,26 @@
+#ifndef id2FC7119D67FA4704B5FE8A9FDA148F46
+#define id2FC7119D67FA4704B5FE8A9FDA148F46
+
+#include "doorkeeper/primitivetypes.hpp"
+#include <cstdint>
+
+namespace dk {
+	template <uint32_t D>
+	typename Vector<D>::value_type tile_volume ( const Vector<D>& parFrom, const Vector<D>& parTo ) a_pure;
+
+	template <uint32_t D>
+	inline
+	typename Vector<D>::value_type tile_volume (const Vector<D>& parFrom, const Vector<D>& parTo) {
+		typedef typename Vector<D>::value_type scalar_type;
+
+		scalar_type ret_val((1));
+
+		for (uint32_t z = 0; z < D; ++z) {
+			const auto dist(parTo[z] - parFrom[z] + 1);
+			ret_val *= dist;
+		}
+		return ret_val;
+	}
+} //namespace dk
+
+#endif