Hi,
I need to extract the extents of LiDAR point cloud data.
The HullAccumulator not the HullReplacer does not seem to export the extents. Instead it outputs a bounding box, which is not what I need.
Please see image below:
Please see the example simple workbench with sample data attached.
Please can you help what I am doing wrong?
Your help much appreciated!
Many thanks,
Magda
Best answer by takashi
Hi @wilczekmj, I was able to reproduce the same symptom. I think the HullReplacer should generate true convex hull rather than bounding box. Hope someone from Safe will investigate this issue. @NatalieAtSafe
As an interim workaround, you can transform the point cloud into a Single Multipoint geometry with the PointCloudCoercer (Output Geometry: Single Multipoint), then use the HullReplacer to generate the convex hull.
+51Hi @wilczekmj,
If you want to extract information BoundingBox in Lidar, i suggest the transformer PointCloudPropertyExtractor.
Thanks
Danilo
Hi @wilczekmj, I was able to reproduce the same symptom. I think the HullReplacer should generate true convex hull rather than bounding box. Hope someone from Safe will investigate this issue. @NatalieAtSafe
As an interim workaround, you can transform the point cloud into a Single Multipoint geometry with the PointCloudCoercer (Output Geometry: Single Multipoint), then use the HullReplacer to generate the convex hull.
Hi @wilczekmj, I was able to reproduce the same symptom. I think the HullReplacer should generate true convex hull rather than bounding box. Hope someone from Safe will investigate this issue. @NatalieAtSafe
As an interim workaround, you can transform the point cloud into a Single Multipoint geometry with the PointCloudCoercer (Output Geometry: Single Multipoint), then use the HullReplacer to generate the convex hull.
Looking forward to hear from Safe.
Hi @wilczekmj,
If you want to extract information BoundingBox in Lidar, i suggest the transformer PointCloudPropertyExtractor.
Thanks
Danilo
Thank you, but I do not want to extract the BoundingBox (B on my image) - this works fine, I need a Hull (which is A on my image).
+56Hi @wilczekmj - that appears to be a known issue. For your reference it is filed as PR#66381 and I have added a link to this thread and increased the priority.
For now the only workaround is the PointCloudCoercer as @takashi suggests.
Apologies for any inconvenience this is causing.
