Connects sequential point and/or line features to create line or area geometry.

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Typical Uses

  • Connecting points to form a line

  • Connecting multiple lines into longer, continuous lines

How does it work?

The LineBuilder receives features with point and/or line geometry, and connects them in the order received, producing line or area geometry.

Both the order in which the features enter the transformer and the orientation of any line geometry received are honored. Gaps between line features are connected, and duplicate points may be either processed or ignored.

Z values are supported. If some input features have z values and others do not, those without are assigned a z value of zero (0). Features with matching x and y coordinates but differing z values are not considered duplicates.

If the output feature is closed (the first and last x and y coordinates are the same), an area is output whether or not the z values match.

Features may be grouped by attribute values to produce multiple outputs.

Attributes may be merged, dropped, or collected as List Attributes.


Usage Notes

  • The Sorter may be useful for ordering features before using the LineBuilder.

  • As the LineBuilder fills in gaps between features, it can produce unexpected results if the input features are not sorted correctly. To combine adjoining lines (without creating new geometry to connect gaps), use a LineCombiner.

  • The CoordinateSwapper may be useful in specific cases.

Creating and Modifying Linear Features

These transformers work with lines in a variety of ways.


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.

FME Community

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Keywords: "point joiner" "line creator" PointConnector