Polygons closing check

The verification for the equality of coordinates between the first and last points of the contours of a spatial object is being conducted. All contours of the spatial object must be closed and have no fewer than 4 points.

Exception: a polygon with a point symbol in the center.

One of the contours of such an object may have only one point. This property is assigned in the classifier editor on the «Objects» tab - Properties.

During the control process in «Editing» mode, objects containing closure errors are corrected. Absolute coincidence of coordinates between the first and last points of the contours is ensured.