Smoothing the regions

The result of transformation of a classification raster  into vector lines greatly depends on smoothness of edges of the recognized regions. Therefore before transformation to a vector it is necessary to execute smoothing of the edges. Level of smoothing - a number in a range from 0 up to 1. The lower level, the more smoothed edges.

It is necessary to pick a level of smoothing so that at edges of regions there were no teeth. Values in a range from 1е-3 up to 1е-5 are usually used.