Archived grib display problem

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Do not forget the magic words: hello, hi, thank you, etc.
Rude messages are rejected and remain unanswered.
It is often necessary to be patient because there are many other activities even more exciting in our life.
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guimeixen
Posts: 2
Joined: 06 Apr 2016 21:22

Archived grib display problem

Post by guimeixen » 06 Apr 2016 21:51

Hi,

I download some grib files from here: http://nomads.ncdc.noaa.gov/data/gfsanl/
When open them in zyGrib they open fine but they seem to be displayed a bit higher on the map than they should.
Here's two photos describing the problem.

11 Jul 2013
CAPE - image taken from the Estofex site.
Image

You can see that once we reach the shore, cape drops drastically.
But in zyGrib it displays it a bit higher on the map. the region with the most cape is almost all in the sea. You can see it the image:
Image

Is there anything I can do to fix it?

Thank you.

jza
Site Admin
Posts: 601
Joined: 19 Jan 2009 00:22

Re: Archived grib display problem

Post by jza » 10 Apr 2016 00:47

Hi,
Sorry, I give an explanation but no solution.
The gfsanl archived grib1 files are at a low resolution: 1°.
The resolution in latitude is near 110 km at the latitude of Spain.
cape1.jpg
The grib2 files of gfsanl are at a better resolution: 0.5°.
cape2.jpg
But the actual version of zyGrib cannot display grib2 file.
It's a work in progress for a future version.
Meanwhile I use cnvgrib, a NOAA tool, to convert grib2 file into grib1 format.
A+
Jacques

guimeixen
Posts: 2
Joined: 06 Apr 2016 21:22

Re: Archived grib display problem

Post by guimeixen » 10 Apr 2016 16:39

Hi,

Thank you for your answer. I searched for the program on google and in the first link I found the source code. I will have to compile it myself isn't it? Is there any executable online?

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