Index: trunk/src/org/openstreetmap/josm/gui/layer/WMTSLayer.java
===================================================================
--- trunk/src/org/openstreetmap/josm/gui/layer/WMTSLayer.java	(revision 11788)
+++ trunk/src/org/openstreetmap/josm/gui/layer/WMTSLayer.java	(revision 11789)
@@ -75,5 +75,6 @@
             return getMaxZoomLvl();
         }
-        Scale snap = scaleList.getSnapScale(Main.map.mapView.getScale(), false);
+        double displayScale = Main.map.mapView.getScale() * Main.getProjection().getMetersPerUnit(); // meter per pixel
+        Scale snap = scaleList.getSnapScale(displayScale, false);
         return Math.max(
                 getMinZoomLvl(),