How to extract a boundary edge from a 3d point cloud

[Joseph_Oster]

Unable to open R7 Rhino file in R6 but this might be helpful?

Strategy for removing points inside PointCloud

I managed to get a “concave mesh” (white group) and perimeter boundary around the point cloud. I left out the Graph Mapper from the other model that causes the gradient effect and cull all the points within ‘edge_L’ distance from the perimeter. [CullInnerArea_pointcloud_2020May15a] CullInnerArea_pointcloud_2020May15a.gh (228.8 KB)

There is a boundary line in the purple group.