Calculation of values of semantics for incoming objects

This task works in two modes: calculations on semantics and copy of semantics from entering objects into selected polygons.  

The mode "Calculations on semantics" allows to analyse distribution of the objects group inside the selected polygons (polygon objects) and to fill semantic characteristics of polygons by results of the executed analysis.

The analyzed objects are defined by the filter of map objects to which they belong.

In analyzing the distribution of objects by polygons several included characteristics can be simultaneously filled. Values of polygons semantics are defined on the basis of aggregate of appropriate values of characteristics of the objects entering fully or partly into polygons.

If in the table column Read from the semantics there is no assignment, such measurements as Area or Length of object of the analysis must be considered.

Following parameters are calculated:

- total value of the specified characteristic of object within each polygon;

- middle value of the specified characteristic of object within each polygon;

- minimum value of the specified characteristic of objects within each polygon;

- maximum value of the specified characteristic of objects within each polygon;

- percentage of entry of the object into the polygon (this semantics is placed into the object of analysis) ;

- number of objects, entirely owned by the polygon;

- number of objects, partially owned by the polygon.

General view of the task dialog window:

To processing in this procedure are exposed polygon objects preliminarily selected on a source digital map (for example, by means of search and mark).    

Sequence of the actions necessary for an execution of calculations is the following:

- by Filter button to set the list of the objects analyzed onto a belonging to selected polygons; the filtration can be done by layers, numbers of objects, type, etc.;

- to specify names of read semantic characteristics (semantics of the analyzed objects, which are being in territory of edited objects, should have numerical type);  

- to specify the name of the filled semantic characteristic of polygons (numerical or symbolic).

Those operations for which semantics fields in the table are filled participate in calculations.

For the objects crossed with specified polygons, the correction factor is calculated in case the component is used: Take into account the factor entering the polygon. Values of the calculated characteristics will be proportional to length or the area of object getting into range, relative to the total length or the area of object.

The mode "Copy semantics" is intended to transfer the semantic information of entering object into object-polygon according to the specified codes of characteristics.

By mouse click in the left side of the table there are set the semantics codes that belong to the incoming objects selected by Filter button. The column on the right is intended for a choice of semantics from the map classifier on which the selected polygon objects are located.

If the table field "Write to the semantics" is not filled, then the semantics with a code similar to the code in the column "Read from semantics" will be written into object.

For multiple recording any characteristic (for example, "Own name") into the polygonal object it is necessary to provide possibility of its repetition (the task "Classifier Editor", check box "Allowed to be repeated").

In dialog there is a tool of cleaning the cells and deleting the rows of the semantics table by item of the pop-up menu which is activated by right-clicking in a table row.