FME Transformers: 2024.1

Categories
Calculated Values
Point Clouds
Related Transformers
ExpressionEvaluator
PointCloudComponentAdder
PointCloudComponentCopier
PointCloudFilter
PointCloudOnRasterComponentSetter
PointCloudSorter
PointCloudStatisticsCalculator
RasterExpressionEvaluator

PointCloudExpressionEvaluator

Evaluates expressions on each point in a point cloud feature, including algebraic operations and conditional statements, and sets individual point cloud component values.

Jump to Configuration

Typical Uses

  • Performing calculations on individual point values within a point cloud
  • Updating point cloud component values
  • Adding new point cloud components

How does it work?

The PointCloudExpressionEvaluator receives point cloud features and evaluates defined expressions using the individual points’ component values, then outputs a point cloud feature with the calculated values applied to existing or new components.

Expressions

Expressions are defined in the right-hand column of the Component Expression(s) table. Each line in the table corresponds to one component, which may be new or existing. Component names may be selected from a list of standard components, or user-specified.

The Data Type for each component is also specified here, and may be set to automatically determine the appropriate type, or to preserve the type of an existing component. Strings are not supported.

Expressions may be as simple a constant value or simple arithmetic operation. The Arithmetic Editor is available via the Expression ellipsis (...) button to assist in the construction of expressions. Point cloud components are available in the editor.

Expressions are case-sensitive.

Examples

Usage Notes

  • This transformer does not support strings. To add string components, use the PointCloudComponentAdder.
  • This transformer can be used to set an existing component to a constant value by setting the expression to the desired constant.
  • The arithmetic editor is available from the ellipsis (...) button to assist in constructing expressions. See Arithmetic Editor for full documentation.

Choosing a Point Cloud Transformer

FME has a selection of transformers for working specifically with point cloud data.

For information on point cloud geometry and properties, see Point Clouds (IFMEPointCloud).

Configuration

Input Ports

Output Ports

Parameters

Editing Transformer Parameters

Transformer parameters can be set by directly entering values, using expressions, or referencing other elements in the workspace such as attribute values or user parameters. Various editors and context menus are available to assist. To see what is available, click beside the applicable parameter.

For more information, see Transformer Parameter Menu Options.

Reference

Processing Behavior

Feature-Based

Feature Holding

No

Dependencies None
Aliases  
History  

FME Community

The FME Community is the place for demos, how-tos, articles, FAQs, and more. Get answers to your questions, learn from other users, and suggest, vote, and comment on new features.

Search for all results about the PointCloudExpressionEvaluator on the FME Community.

 

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

Keywords: point "point cloud" cloud PointCloud LiDAR sonar