Turn on extract filter

The "x" option at the Main Menu will turn on shadow masking. This is something you will want to do since you do not want shadows to be interpreted as topography. LITHOS will ask you to enter the tolerance; .025 is the standard input.

Main Menu: Q 0123O IUCRSG NVAMBX DEPL FZH? x
 >x                                                                               
 enter tolerance
.025

 Current landmark = EE0001
SCALE =  0.000100 QSZ =   49
 Lat/Lon/Rad =     -6.806   264.097     0.266
 Region = EE

 gc LMRK_DISPLAY0.pgm
 gc LMRK_DISPLAY1.pgm


 check display
Main Menu: Q 0123O IUCRSG NVAMBX DEPL FZH?

== Standard Input ===

.025