2.2.18. Advanced vector generalization

Simplification of vector layer features to reduce data volume.

Inputs:

Vector layer. Layer in ESRI Shapefile format, packed in a ZIP archive;
Merging of nodes. The value (in coordinate system units) at which geometry nodes begin to merge with each other. Default is -1 and corresponds to the absence of merging of nodes. Optional;
Number of iterations. An integer indicating the number of iterations of the simplification, smoothing, or shifting procedure. Optional;
Method. Choose a generalization method: douglas, douglas_reduction, lang, reduction, reumann, boyle, sliding_averaging, distance_weighting, chaiken, hermite, snakes, displacement;
Threshold. Required parameter. If the method does not refer to this parameter, specify any number;
Number of points. An integer that specifies the number of points used in some methods. Optional. The default value is 7;
Reduction. A number from 0 to 100. In the simplification algorithm, it characterizes the percentage of points that are preserved relative to the original number of points. An optional parameter. The default value is 50;
Slide. A number from 0 to 1, characterizes the shift of the obtained point relative to the original. Optional parameter. The default value is 0.5;
Minimum angle. A number from 0 to 180. Specifies the minimum angle between two consecutive line segments. Optional. The default value is 3;
Alpha. Number, parameter for the Snakes method. Optional. The default value is 1;
Beta. Number, parameter for the Snakes method. Optional. The default value is 1.

Output:

The result of the process is a layer with simplified features (geometries).

Try it out using our sample:

Download input dataset to test the instrument. Step-by-step instructions included.

Get the output to additionally check the results.