An S4 class to represent the header of .las or .laz files according to the
LAS file format specifications.
A LASheader
object contains a list
in the slot @PHB
with
the data read from the Public Header Block and list
in the slot @VLR
with
the data read from the Variable Length Records
PHB
list. Represents the Public Header Block
VLR
list. Represents the Variable Length Records
EVLR
list. Represents the Extended Variable Length Records