Re: converting from lambert projection to lat-lon projection (UNCLASSIFIED)

Steve,
Sorry I was not fully thinking this through. The GRIB file when read
in through NCL will already have the lat/lon coordinates available as
2D arrays. The visual example I pointed to is only useful for getting
these values if they are not already available. To actually regrid to
a lat/lon projection requires one of the regridding functions. My
first suggestion is still valid.
  -dave

On Oct 23, 2009, at 11:24 AM, David Brown wrote:

> Hi Steve,
> You can look at the regridding page of the examples: http://www.ncl.ucar.edu/Applications/regrid.shtml
> Especially take a look at the regridding decision tree.
>
> Another more visual solution is to use the technique of drawing a plot
> of the data in its native projection, then using the ndctodata
> function to get the lat/lon positions of the grid points. There is an
> example of this technique on the "native grid projection" page: http://www.ncl.ucar.edu/Applications/native.shtml
> . See the last example: native_5.ncl.
> -dave
>
>
> On Oct 23, 2009, at 10:53 AM, Kirby, Steve (Civ, ARL/CISD) wrote:
>
>> Classification: UNCLASSIFIED
>> Caveats: NONE
>>
>> Hi,
>>
>> I need to convert a GRIB1 format file I have, from lambert
>> projection to a
>> lat-lon projection.
>>
>> I noticed there was a thread on this in ncl-talk from Feb 2009 and
>> Jin-Sheng
>> Lin had posted some FORTRAN code called conv.f. I tried to pull it
>> up but
>> the link no longer worked. If that is still available, it would be
>> great to
>> be able to see it.
>>
>> Or, if there are some code/scripts under the NCL umbrella that do
>> this type
>> of conversion, would someone please point me to them.
>>
>> Thanks very much,
>> skirby
>>
>> Classification: UNCLASSIFIED
>> Caveats: NONE
>>
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Received on Fri Oct 23 11:31:04 2009