Extract Power Lines

Clicking the Extract Power Linesbutton in the Extractpanel of the Action Tab will put the current mode into Extract Power Lines.

Notes:
1. For point clouds that have a high density, the time taken to process using these features could be quite considerable so it is advised that the cloud is Cleaned prior to running these routines. For most clouds, the Duplicated Points Distance Thresholdcould be set to 0.04 (which is approx. 0.5 inches) or if using a metric cloud, set the value to 0.012.

2. This routine works best when working with Non-ground points. To quickly do this, use the Extract Bare Earth routine. Under the Extract Destinationheading, choose Non-Ground Cloud. This will reduce the number of points in the cloud making it easier to work with.

Polyline Layersets the layer that the newly created data will go into. Click on Setto bring up the layer manager.

Detection Modesets the type of routine used to extract the power line.

3 Pointuses more manual entry, but is generally more reliable.

1. Specify the wire position on the first pole
2. Specify a point on the wire in between the poles (can be anywhere along the wire, but works best if a point in the middle is chosen)
3. Specify a point on the second pole

A polyline should now be generated that follows the curvature of the power line.
1 Pointallows a user to click on a point in the middle of the line. This routine looks in both directions and it can find the power line on its own with just one point. Try and pick a point in the middle that has a good amount of data for the algorithm to look for. This works best where there is a lot of data on the lines and no holes in the data.

1 Point Find All is the same as 1 Pointmode except it uses the search radius parameter to try to identify several power lines all at once. Find all Search Radiusneeds to be large enough to span in between the power lines.

Tab Location(s): Action Tab
Panel and Button: Extract Power Lines
Prerequisite: Open scene of a scan or cloud