Point Cloud Annotation Editor

This page describes how to create point cloud annotations.

Main Toolbar > Extract > Point Cloud Annotation Editor

Point Cloud Annotation Editor tool creates annotations of a point cloud from features: polygons or polylines. Having the annotations, point cloud selections, created allows to create a classified point cloud.

Select a point cloud in OPC format from the workspace.

Select the features to use to create the selections. Two options are available: polygons or polylines. Select the features from a vector dataset from the workspace.

Create Selection - Select which features to use to create annotations. By default all added features are used, but it possible to select an attribute containing information on which features to use. When an attribute is selected, attribute value should match “true”, “false”, “1”, “0”, “yes” or “no”, or the feature will not be used.

Selection Method - Select the selection method. For polygons methods are 2D and 3D. For polylines methods are: 2D, 3D circular and 3D rectangular. 3D circular creates a circular selection around the line, 3D rectangular creates a rectangular prism around the line. Optionally a String attribute can be selected, attribute values need to match “2D”, “3D”, “3DRectangular” or “3DCircular”. When attributes is not defined or is different from this options, defautl method is used, which is 3D for polygons and 3DCircular for polylines.

Class Id - The class ID to give to the annotation created with the features. Optionally a feature attribute (Integer or String) can be selected and multiple annotations will be created, depending on this attribute.

Height - When selection method is 3D, a height value is used. Optionally a feature attribute (numeric) can be used.

Height Margin - A margin can be added to the height, above and below. Optionally a feature attribute (numeric) can be selected.

Width - When feature is a polyline and selection method is 3D, width is used to define the selection. If selection method is 3DCircular, this width is used as a radius around the line; when selection method is 3DRectangular this value is used to both sides o the line horizontally. A numeric attribute can be selected.

Anchor - When doing a 3D selection, an anchor is needed to define reference. A feature attribute (String) can be used, values should match “Top”, “Middle” or “Bottom”, otherwise default value “Middle” is used.

The annotations are saved as point cloud selection files. Button “Create Classified Point Cloud” opens tool Point Cloud Selections to Classification and presets it with the point cloud and selection files created.