Changing scale range of marked objects

The visibility borders of map objects it is a scale range of map displaying on a screen, at which one the given object is shown on the screen.

The visibility borders are applied for automatic generalization of object content and unloading of map displaying  (amount decrease of displayed objects) during its scaling.

The identical borders of visibility for all objects of one type are determined during creation and editing of the digital classifier.

However there can be a situation when the map objects of one type have different sense priority. That is these objects should disappear from a screen at a different degree of decreasing of map displaying.

To set visibility borders of the given objects list which (borders) are differed from conforming values in the classifier, it is necessary to mark this list on a map (by using program Search functions and to execute procedure of the setting of new borders.

It is possible to select values of top and bottom border of visibility from a list, to set them according to classifier or to set full range of visibility.