Clones of objects

Clone of object is an object that has a link to the metric of the cloned object and its own conventional symbol. Typically, by such objects the map design objects are created, for example, centerlines of roads. This allows you to reduce the amount of stored data and synchronize the editing of the objects metrics and their design elements. Separating design objects into separate objects-clones allows to execute their display after completion of displaying all being designed objects and to improve the image quality (for example to execute procleaning the intersections of all roads).