grdtrack(1) on Linux
The text 4acf62257211, as Debian 3.0 (Woody) shipped it. The page shows this text now.
Sampling of a 2-D grdfile along 1-D trackline (a sequence of x,y points)
Flags it lists
-
-: -
-G -
-H -
-L -
-M -
-Q -
-R -
-S -
-V -
-Z -
-bi -
-bo