I have a table of data values (6509 in each dimension) which
represents
global point values at a resolution of 1.5-degrees... I want to
perform a
linear interpolation to change the resolution of this data to 5-
minutes.
This will require 18 new values to be created above, below and to both
sides
of each existing data value in the current table (except in instances
where
a value is not surrounded by four values, eg. at the edges of the
table,
where only values available should be used).

If anyone has any helpful tips, or could create some Fortran code to
achieve
this, then I'd be very grateful.