Union of objects

This mode is intended for uniting polygon objects, in which the values of semantics coincide. For example, for automation of process of merging the forest quarters into district forestry. The mode "Union of objects" provides streaming processing of map objects having adjacent borders and identical values of attributes. Thus, only polygon objects of the type specified in the dialog, which are located on one sheet of the map, are processed.

The procedure for working with the dialog is as follows:

- select the required map from the list of maps;

- select from the list or create a new map for drawing objects;

- make a list of semantics, by which values the uniting will be made;

- select the type of source objects;

- select the type of the resulting objects;

- click «Run» button.

Formation of the semantics list is made using the buttons «+» and «-». Addition into the list two times of same semantics is not provided.

The program collects statistics on semantics, chooses unique values, automatically creates samples of objects with identical values of semantics and carries out their merge. If in source objects the semantics which are added into semantics list are not filled, then such objects will not be united. The maximum length of the processed semantics value is 255 characters.

The execution of the task can be interrupted by the «Exit» button, which during the execution turns into the «Cancel» button. The result of the work are the newly created objects. If the source objects did not touch each other, and there is no possibility to unite them, they will be added to the resulting object as the multipolygon contours. It is desirable that the source objects were simple (not multipolygons), otherwise after execution, it is possible that not all the contours of the source multipolygon object will be added to the resulting object.