I am exploring some USGS LiDAR data sets and found several occurrences of data sets with the same name except that one had the acronym "TL" in its name and the other not. Example of this is:
What is the meaning of "TL"? And how will it make the point cloud different from the the other data set?
My online searches gave nothing and the only possibility I can think of would be Topographic Lines but I could not confirm so far.
Edit: The links do not point to the same tile, but more examples are found in this FTP