depth_GLBa0.04.DV05 to GLBa0.08 via half_topog                                 
i/jdm = 4500 3298 1x smoothed in GoC, 2x elsewhere                             
sill depth corrections by Christy Thomas                                       
Java Sea corrections                                                           
Modified Denmark Strait sill                                                   
min,max depth =     10.000  9999.900