file title  : Land/Sea Mask
id type     : integer
file type   : binary
object type : polygon
ref. system : latlong
ref. units  : rad
unit dist.  : 1
min. X      : -180.0408325
max. X      : 180.0408325
min. Y      : -89.9574966
max. Y      : 83.759491
pos'n error : unknown
resolution  : unknown