@Override
    public void setTrack(final String key, final IGeoItemSupplier route, final int unused1, final int unused2) {
        mapActivity.getTracks().setRoute(key, route);
        resumeTrack(key, null == route);
        updateRouteTrackButtonVisibility();
    }
Set the zoom of the map. The zoom is restricted to a certain minimum in case of live map.
main/src/main/java/cgeo/geocaching/maps/CGeoMap.java