CPTv10+ files for max [ X , max $partialdiff sub X$ $partialdiff sub Y$ ( WORLDBATH bath ) ]

WORLDBATH[bath ]
grid: /X (degree_east) periodic (0) to (0.08334351W) by 0.08333333 N= 4320 pts :grid
grid: /Y (degree_north) ordered (89.95834S) to (89.95834N) by 0.08333334 N= 2160 pts :grid
max [ X , max $partialdiff sub X$ $partialdiff sub Y$ ( WORLDBATH bath ) ][ X |]