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diff --git a/src/maputils.h b/src/maputils.h
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+/* -*- Mode: C; indent-tabs-mode: t; c-basic-offset: 4; tab-width: 4 -*- */
+/*
+ * viking -- GPS Data and Topo Analyzer, Explorer, and Manager
+ *
+ * Copyright (C) 2013, Rob Norris <rw_norris@hotmail.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ *
+ */
+#ifndef _MAP_UTILS_H
+#define _MAP_UTILS_H
+
+#include <glib.h>
+
+G_BEGIN_DECLS
+
+/* 1 << (x) is like a 2**(x) */
+#define VIK_GZ(x) ((1<<(x)))
+// Not sure what GZ stands for probably Google Zoom
+
+gint map_utils_mpp_to_scale ( gdouble mpp );
+
+guint8 map_utils_mpp_to_zoom_level ( gdouble mpp );
+
+G_BEGIN_DECLS
+
+#endif