lookup extentions (->minor 3)

brouter-util/src/main/java/btools/util/DenseLongMap.java

@@ -173,7 +173,24 @@ public class DenseLongMap
     	}
     	System.out.println( "****************************" );
     }
-	  
+
+    /* actual stats for the 30x45 raster and 512 blocksize with filtered nodes:
+     *
+     **** DenseLongMap stats ****
+     putCount=858518399
+     0-bitplanes=783337
+     1-bitplanes=771490
+     2-bitplanes=644578
+     3-bitplanes=210767
+     4-bitplanes=439
+     5-bitplanes=0
+     6-bitplanes=0
+     7-bitplanes=0
+     *
+     * This is a total of 1,2 GB
+     * (1.234.232.832+7.381.126+15.666.740 for body/header/object-overhead )
+    */
+
     if ( key < 0 )
     {
       return -1;