It is a 2d array which will serve to mask the field we will trace after with CONTOUR,
...TRIANGULATION=triangule(mask)
If this argument is not specified, the function use tmask
Keywords
COINMONTE
It is an array. To obtain the array of "ascending land corner" to be treated with
completecointerre.pro in the variable array instead of make it pass by the global
variable twin_corners_up.
COINDESCEND
It is an array. See COINMONTE
SHIFTED
BASIC
Specify that the mask is on a basic grid (use the triangulation for vertical cuts and hovmoellers)