Define a linear feature in ReCap Pro

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In ReCap Pro, Linear Feature Extraction allows you to extract linear features,

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such as curbs and gutters, from a point cloud dataset.

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Published ReCap point cloud projects have access to extraction tools in the Autodesk Construction Cloud viewer.

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Before you extract a linear feature, you must first define its shape.

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From a web browser, navigate to a ReCap project that has already been published to the cloud.

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Zoom into a linear feature, such as a curb, and orient the view at the planned beginning point of your extraction.

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From the toolbar, select Linear Feature Extraction.

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Then, select a point in the point cloud.

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A Cross Section View of the selection displays as well as a Cross Section Widget.

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Use the widget arrow as a directional guide by hovering your cursor around the widget.

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Back in the Cross Section View, the display updates based on the direction you indicate.

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Click a point in the direction of the intended extraction.

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Once a direction is selected, the arrow is locked in place.

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Now, in the Cross Section View, click and drag to arrange the feature points of the cross-section to define the shape of the extraction.

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In the Cross Section Widget, the feature points update according to your adjustments.

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Continue to arrange the points until the shape of the extraction is satisfactory.

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In this case, adjustments are made until the lower feature point aligns with the edge of a curb’s flag.

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When a linear feature extraction is first created, it is assigned 4 feature points with default tags.

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Each time a feature point is added to an extraction, a new tag is created.

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To organize the feature points, you can rename and assign specific colors to them.

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Feature points can also be tagged.

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In the Cross Section View, click Edit Feature Points.

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Select a feature point and then click Tag.

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This opens the tag editor which displays the current tag name and color of the selected feature point.

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Select X to remove the current tag.

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A search field and a list of already existing tags display.

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If you cannot find an appropriate tag, enter a tag name in the search field and press ENTER.

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The new tag displays in the drop-down.

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Select the new tag and then click Done.

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Edit the other feature point tags as needed.

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Once finished editing, you can also add more feature points.

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To do so, select a gray point.

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A color is automatically assigned to it, and you can edit it as you did before.

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For now, however, select the new point and then select Delete Point.

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The new point is now removed from the Cross Section View.

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Working with feature points is a critical step in linear feature extraction.