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GRIB: 1,3,5,5
2,4,5,5
1,0,3,1
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number or list integral (fieldset)Computes the surface integral of each field in a fieldset. The result is either a number (for one input field) or a list of numbers (for multiple input fields). The computations are based on the cell area (in m2 units) returned by the grid_cell_area() function.
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Returns the indexes of the four gridpoints surrounding the given location, ordered by increasing distance from the target point. If a list is given, it must contain two numbers - latitude and longitude. If two numbers are given, the first is the latitude, the second the longitude. The field must be a gridded field. If the fieldset has only one field, a number is returned; otherwise a list is returned. In the case where the field is a reduced Gaussian grid and the input location is at the North or South pole, beyond the most extreme row of points, there will be a 'circle' of surrounding points, and all of these indexes are returned.
Where it is not possible to generate a sensible value due to lack of valid data in the fieldset, nil is returned.
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