Building of buffer zone around of marked map objects |
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For this purpose it is necessary: 1. To mark some objects on the main map using Search/Mark mode or custom map and click the mode button. 2. Enter the radius of the zone in meters or select the numerical semantics permissible for the selected objects. 3. To record the objects of the zone, select an existing map or create a new one.
For buffer zone building around of vector objects it is necessary to specify a way of processing of the given type of objects — as linear or as dot.
Window Distance between points on edge and Limit removal of angular point in radiuses are intended for customizing by the user of the form of zone edge. For the rounded edges of zones the distance between points on the edge in the meters is entered, recommended value - radius of a zone/15. At direct types of angles it is necessary to specify the maximal removal of a point from an angle in radiuses. Recommended values — from 1 up to 3.
For deleting unnecessary points of zone, you need to enable the Filter built area option and enter a number in the Precision filtering (m) field. The recommended tolerance value — zone radius/100. The tolerance value is calculated automatically after entering the zone radius and enabling the Filter built area option. After the zone is formed, the created object is linearly filtered. For zones with right angles, extra nodes at the outer corners of the zone are deleted. |
The given mode allows to build a buffer zone around of the marked objects and to write down it as object into main or user map. In this task linear, dot, area and vector objects are processed.