Is there a way to find the number of points in a classification?

Hi Jovan,

Currently there is no way of knowing how many points have a specific classification. Like you mentionned, exporting the pointcloud using a single classification is possible but it's tidious work only to find how many points have specific classifications.

Using the pointcloud API, you could write a pretty simple routine that would output those stats.

I will forward your request to product management.

Thanks,

Simon

Hi Jovan,

I am product manager and take care of the point cloud in MicroStation based products as well as in Pointools.

Could you elaborate more on the use case here ? Why do you want to know how many points are in each class ?

Do you really need the exact information (costly to get since each points has to be considered including in dataset made of billions of points) or an estimation is good enough ?

tx in advance

Ben

Thanks guys. I am classifying gas seeps in point clouds that were obtained from a multibeam echosounder. By running sections through the data I can classify and isolate seeps so that I end up with data that looks something like this example;

These seeps rise from the ocean floor as bubbles. As they rise, they sort of lose density but gain volume, and are taken by the ocean current and move in different directions. You can see that different seeps are releasing different volumes. I've tried to experiment with creating mesh elements (doesn't work on this kind of data?) and solid elements (Loft/Skin solid) to quantify and compare seep locations but it doesn't seem as practical as perhaps comparing them simply based on the number of points. I was thinking I could classify these seeps further according to their location and then compare them that way.