When classifying LAS points within the buffers of the input geometry, you may choose to treat closed lines (i.e., lines that have the same from and to points) as polygons. If you treat closed lines as polygons, all points within the closed lines and within a distance of the lines will be assigned to the destination classification.

Treating closed lines as polygons even when they originate in polyline data sets is particularly useful when features need to be treated separately or individually. For example, a hydrology data set may include stream centerlines, ponds, lakes, and rivers. If you want to prepare the data for use as breaklines, stream centerlines would require a basic removal of points within the buffers. However polygonal features such as ponds, lakes, and rivers, require removal of not only points within the buffer of the lines, but of all contained points.

Learn more about buffering points for breakline enforcements

How to Classify Points within Closed Lines

1. Within the Data Types table on the Conflation point cloud task properties page, click the check box in the Classify Column. Then click the Classify Points within Closed Lines checkbox for the desired type value.

   

2. If the checkbox IS checked, the feature geometry that is closed will be treated as polygons. If the checkbox is NOT checked, the feature geometry will be treated as lines regardless of whether the polylines are closed.