I am new with this point cloud thingy. I managed to get my hands on some lidar data and i am looking to build a 3d cad model of the buildings from that data. I have played around with the features of AutoCad Map 3D but i'm having some difficulties. I managed to create an index file and from there, created a 3d surface. However, instead of getting nice buildings like the one video on youtube (http://www.youtube.com/watch?v=6mprICpGtbk), i got lots of spikes. Is there a way i can somehow churn all these spikes into something that looks like a decent building. Also i need to export the 3d surface but i see that the only option is the sdf extension. Is there a way i can get a tin file?
any sort of help will be deeply appreciated.
Thanks in advance.
There's no way to convert point clouds into straight buildings, 'cause a raw Lidar survey is disturbed by trees, pylons, shadows, and so on.
You could transform that bunch of bumps in a better Tin fashion (but not good-looking) e.g. by means of the opensource Meshlab, sir.
I think the big thing from that video is that they only used the ground strike data to create a surface (i.e. they filtered the cloud data before creating a surface from it). The details you see for the building themselves are just the raw point cloud (not actual geometry).