Definition of emptiness - the areas without of objects on a map

 For emptiness detection  on a map it is necessary to do following actions:

- Preliminary some objects mark by using Search / Mark dialogue or other possible means  (for example a mode of Map Editor). Marking by using Search / Mark dialogue is more preferable to make by mode Mark by frame. To set:

1. The filter for objects.  

2. Area – a map object or an any contour.

3. Borders of search - inside area.

   - Enter a mode Creating of emptiness, to choose a map object - the closed contour, border of area for definition of the empty areas;  

   - In dialogue Filling empty areas to set characteristics of objects - emptiness (a layer, a name, a map).

As a result of work of the given mode on the established map the objects of the given type showing blank territories are created.