I was passed along some LiDAR data that is in .xyzi ASCII format. I am having trouble figuring out a way to build a TIN or DEM from this data. I brought it in using "ASCII 3D to feature", and subsequently attempted to build a terrain dataset with the new feature. "Create Terrain" seems to work, but when I attempt to "Build Terrain", I am given an error that says "The terrain definition is incomplete or invalid".
I am not sure where I have gone wrong. Should the ASCII data be imported as point or multipoint data? Is there a better way of doing this?