TurfConversion { public static double radiansToLength(double radians) { return radiansToLength(radians, TurfConstants.UNIT_DEFAULT); } private  TurfConversion(); static double lengthToDegrees(double distance, @TurfUnitCriteria String units); static double degreesToRadians(double degrees); static double radiansToDegrees(double radians); static double radiansToLength(double radians); static double radiansToLength(double radians, @NonNull @TurfUnitCriteria String units); static double lengthToRadians(double distance); static double lengthToRadians(double distance, @NonNull @TurfUnitCriteria String units); static double convertLength(@FloatRange(from = 0) double distance,
                                     @NonNull @TurfUnitCriteria String originalUnit); static double convertLength(@FloatRange(from = 0) double distance,
                                     @NonNull @TurfUnitCriteria String originalUnit,
                                     @Nullable @TurfUnitCriteria String finalUnit); static FeatureCollection explode(@NonNull FeatureCollection featureCollection); static FeatureCollection explode(@NonNull Feature feature); static Feature polygonToLine(@NonNull Feature feature); static Feature polygonToLine(@NonNull Feature feature, @Nullable JsonObject properties); static Feature polygonToLine(@NonNull Polygon polygon); static FeatureCollection polygonToLine(@NonNull MultiPolygon multiPolygon); static Feature polygonToLine(@NonNull Polygon polygon, @Nullable JsonObject properties); static FeatureCollection polygonToLine(@NonNull MultiPolygon multiPolygon,
                                                @Nullable JsonObject properties); static FeatureCollection multiPolygonToLine(@NonNull Feature feature); static FeatureCollection multiPolygonToLine(@NonNull Feature feature,
                                                     @Nullable JsonObject properties); static FeatureCollection combine(@NonNull FeatureCollection originalFeatureCollection);  }
@Test public void radiansToDistance() { assertEquals( 1, TurfConversion.radiansToLength(1, TurfConstants.UNIT_RADIANS), DELTA); assertEquals( 6373, TurfConversion.radiansToLength(1, TurfConstants.UNIT_KILOMETERS), DELTA); assertEquals( 3960, TurfConversion.radiansToLength(1, TurfConstants.UNIT_MILES), DELTA); }