Removes specific vertices from a feature’s geometry.

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Typical Uses

  • Isolating vertices

  • Removing portions of vector geometry

How does it work?

The VertexRemover receives features with vector geometry and removes specific vertices (coordinates) from them.

Specified vertices may be either removed or kept. If they are kept, all other vertices are removed.

Vertices are identified by their Coordinate Index position, starting at zero (0), and a Number to Keep/Remove, which is extended from the given index position. For example -

  • If keeping coordinates, if the Coordinate Index is 0 and the Number to Keep/Remove is 15, the first 15 vertices will remain and the rest will be removed.

  • If removing coordinates, the first 15 vertices would be removed.

Vertices can also be identified by their position relative to the end of the geometry, where -1 is the last vertex, -2 is second-to-last, and so on. The Number to Keep/Remove will still be extended forwards (towards the end of the feature). For example -

  • If keeping coordinates, if the Coordinate Index is -22 and the Number to Keep/Remove is 22, the last 22 vertices will remain and the rest will be removed.

  • If removing coordinates, the last 22 vertices will be removed.

An attribute _num_removed is added to the features, indicating the number of vertices removed.

Multi- or aggregate geometries, 3D geometries, rasters, point clouds, and non-spatial features will be rejected.

Areas with holes (donuts) will not produce useful results.



Input Ports

Output Ports


Editing Transformer Parameters

Using a set of menu options, transformer parameters can be assigned by referencing other elements in the workspace. More advanced functions, such as an advanced editor and an arithmetic editor, are also available in some transformers. To access a menu of these options, click beside the applicable parameter. For more information, see Transformer Parameter Menu Options.

Defining Values

There are several ways to define a value for use in a Transformer. The simplest is to simply type in a value or string, which can include functions of various types such as attribute references, math and string functions, and workspace parameters. There are a number of tools and shortcuts that can assist in constructing values, generally available from the drop-down context menu adjacent to the value field.

Dialog Options - Tables

Transformers with table-style parameters have additional tools for populating and manipulating values.


Processing Behavior


Feature Holding


Dependencies None
Aliases CoordinateRemover

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Examples may contain information licensed under the Open Government Licence – Vancouver and/or the Open Government Licence – Canada.