Setting parameters of processing

User can control process of construction of isolines by setting different parameters of processing.

Parameters values of processing by default are stipulated for processing.

To change parameters, it is necessary to bring respective alterations in available windows of editing.

Step of isolines - defines section's interval of the construction characteristic. For example, if isolines are constructed by gaugings temperatures, with the maximal value of 9 degrees and minimal-16 degrees, and the step of isolines is equal 5 it means, that isolines for following values will be constructed:-15,-10,-5, 0 and 5 degrees.

Factor of condensation - defines number of points, which is added at smoothing instead of two next point, in the traced broken line for giving to it the smooth form. Increasing this value, it is possible to achieve ideal smoothness of a line at the largest increase. But as thus the number of points of the metrics are increased, substantial growth is not recommended. The program independently supervises boundary values of factor. The minimal value = 3, maximal = 10.

Characteristic of construction - defines for what numerical characteristic the construction of isolines will be carried out. The characteristic can be taken from semantics of the allocated pickets or from the specified field of the database table. The name of the table is specified in dialog.

Basic isolines - define type of created isolines multiple to a step of construction of isolines. If to not specify type of the basic isolines they will be created by a code «ALLOCATION LINEAR».

Thickened isolines - define type of created isolines multiple to five steps of construction of isolines. If to not specify type of thickened isolines they will be created by a code «ALLOCATION LINEAR».

In "Triangulation" section the necessity of execution of additional processing of a triangulation is indicated. By default additional processing is not carried out. For more exact definition of planned position of the smoothed isolines the processing of triangulation is carried out. At processing the calculation of points coordinates of the center of each triangle is carried out, value of the characteristic is defined by a method of construction of a local polynom of third degree, by the neighbouring points. In case of a condensation the reconstruction of triangulations and its bringing to the requirement of the  Delone theorem are carried out. In case of decomposition the reconstruction of triangulations is not carried out.

Form of isolines - defines a curve form of which will describe created isolines. The broken line will consist only of the points received as a result of position calculation of sections of the characteristic on edges of a triangulation.

It is possible to smooth a broken line with use of body of mathematics of curve Bese, in this case the smoothed line will pass through points of a broken line, or formulas of B-spline (cubic spline interpolation), in this case the maximal smoothness of isolines is achieved, but the curve does not pass precisely through points of a broken line.