private static int getUnifiedMapVariant() {
        try {
            return Integer.parseInt(getString(R.string.pref_unifiedMapVariants, String.valueOf(UNIFIEDMAP_VARIANT_MAPSFORGE)));
        } catch (NumberFormatException ignore) {
            return UNIFIEDMAP_VARIANT_MAPSFORGE;
        }
    }
which variants are enabled for UnifiedMap
main/src/main/java/cgeo/geocaching/settings/Settings.java