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java.lang.IllegalArgumentException: scale factor must not < 1 0.75	at org.mapsforge.core.util.MercatorProjection.getMapSizeWithScaleFactor(MercatorProjection.java:102)	at org.mapsforge.core.util.MercatorProjection.calculateGroundResolutionWithScaleFactor(MercatorProjection.java:63)	at org.mapsforge.core.util.MercatorProjection.metersToPixelsWithScaleFactor(MercatorProjection.java:313)	at cgeo.geocaching.maps.mapsforge.v6.layers.PositionLayer.draw(PositionLayer.java:51)	at org.mapsforge.map.layer.LayerManager.doWork(LayerManager.java:94)	at org.mapsforge.map.util.PausableThread.run(PausableThread.java:140)