// Based on . CTABLE  structure :
  // FIXME: better to have array instead of object holding longitudes, latitudes members
  //        In the former case, one has to document index 0 is longitude and
  //        1 is latitude ...
  //        In the later case, grid object gets bigger !!!!
  //        Solution 1 is chosen based on pj_gridinfo.c
exports.null = { // name of grid's file
  "ll": [-3.14159265, - 1.57079633], // lower-left coordinates in radians (longitude, latitude):
  "del": [3.14159265, 1.57079633], // cell's size in radians (longitude, latitude):
  "lim": [3, 3], // number of nodes in longitude, latitude (including edges):
  "count": 9, // total number of nodes
  "cvs": [ // shifts : in ntv2 reverse order : lon, lat in radians ...
    [0.0, 0.0],
    [0.0, 0.0],
    [0.0, 0.0], // for (lon= 0; lon<lim[0]; lon++) {
    [0.0, 0.0],
    [0.0, 0.0],
    [0.0, 0.0], //   for (lat= 0; lat<lim[1]; lat++) { p= cvs[lat*lim[0]+lon]; }
    [0.0, 0.0],
    [0.0, 0.0],
    [0.0, 0.0] // }
  ]
};