Index: src/uk/me/parabola/tdbfmt/HeaderBlock.java
===================================================================
--- src/uk/me/parabola/tdbfmt/HeaderBlock.java	(revision 1566)
+++ src/uk/me/parabola/tdbfmt/HeaderBlock.java	(working copy)
@@ -92,8 +92,9 @@
 			os.write3(0);
 			os.write4(1252);
 			os.write4(10000);
-			os.write(1);
-			os.write2(0);
+			os.write(1);	// map is routable
+			os.write(1);	// map has profile information
+			os.write(0);	// map has DEM sub files
 		}
 	}