NetCDF driver doesn't recognize grids as uniform.
In GDAL 1.10.x the checks for uniform grids use 5 decimal places. Prior to 1.10.x, it used 2 decimal places. While increased precision is probably the correct way to handle the situation, it doesn't work on grids it used to work on. The attached patch just allows a config option to revert back to the old behavior using NETCDF_SPACING_PRECISION. Etienne, let me know if you think this is worth adding. I would just like to be able to treat files that worked in 1.9 the same in 1.10, even though it's not totally correct.