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Old 02-03-2011, 15:18   #1
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grib display on open CPN

i use version 2.3.1 and ugrib or zgrib to get the gribfiles. I cannot visualize on the chart open in openCPN the arrows for the wind like one can do with both ugrib opr zgrib; any clue? i have givne to open cpn the directory in which the grib files are downloaded
thanks
gee
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Old 04-03-2011, 10:43   #2
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Re: grib display on open CPN

Welcome to OpenCPN.
I'm not quite sure what your problem is.
Have you read the manual?
GRIB Weather PlugIn | Official OpenCPN Homepage

Thomas
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Old 05-03-2011, 05:40   #3
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Re: grib display on open CPN

well, I checked everything described in the manual and it works! I had a zoom too high to see the arrows.....
thanks for pointing to the manual
gérard
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Old 05-03-2011, 05:41   #4
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Re: grib display on open CPN

thanks, it works as described in the manual
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Old 24-12-2011, 15:53   #5
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Re: grib display on open CPN

I use Winlink to send/receive emails whilst underway via SSB ham frequencies. Winlink provides grib file in the .grb format. I cannot get OpenCPN to display these files at all, though it will display .grz files. Is there any way to get .grb files to work? If not, can this be something to look at in future releases please. I guess the same applies to SailMail users too?

Thanks

Ian
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Old 24-12-2011, 16:17   #6
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Re: grib display on open CPN

Can you overlay grib files onto openCPN charts? Is this what this discussion is about?
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Old 24-12-2011, 17:59   #7
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Re: grib display on open CPN

Quote:
Originally Posted by Biggles View Post
I use Winlink to send/receive emails whilst underway via SSB ham frequencies. Winlink provides grib file in the .grb format. I cannot get OpenCPN to display these files at all, though it will display .grz files. Is there any way to get .grb files to work? If not, can this be something to look at in future releases please. I guess the same applies to SailMail users too?

Thanks

Ian

opencpn CAN desplay .grb files

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Old 26-12-2011, 09:27   #8
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Re: grib display on open CPN

No I cannot overlay Grib direction arrows and isobars over C-maps. I can in Maxsea but not OpenCPN. I use Gribs as follows in OpenCPN. I click on the Grib icon and select the appropriate date/time file. All data boxes are ticked. Wind speed, direction and pressure boxes contain data and change value when the mouse pointer is moved over the chart. But, no data is displayed on the chart. Using Win7 Home Premium 64 bit, Intel core processor, 8 Gb of RAM and a Nivadia GeoForce video card. Ugrib works fine, but not open CPN. I hope this clarifies my problem.
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Old 26-12-2011, 09:33   #9
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Re: grib display on open CPN

Thanks for the reply. I wish I could see the same on my set up, but I cannot. I do get the wind speed, direction and pressure boxes filled with data, and the values do change as the mouse pointer moves across the chart, but there is no overlay on the chart itself. Looks like a layer is missing.
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Old 26-12-2011, 09:44   #10
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Re: grib display on open CPN

Quote:
Originally Posted by Biggles View Post
Thanks for the reply. I wish I could see the same on my set up, but I cannot. I do get the wind speed, direction and pressure boxes filled with data, and the values do change as the mouse pointer moves across the chart, but there is no overlay on the chart itself. Looks like a layer is missing.
Which version of OpenCPN are you using?
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Old 26-12-2011, 11:28   #11
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Re: grib display on open CPN

2.5 stable and 2.6 beta. I have tried both 'other' and 'Mariner. vector chart settings but no change.
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Old 26-12-2011, 12:35   #12
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Re: grib display on open CPN

Biggles.....

GRIB display on 2.6 Beta series is known broken.

However, there are no reports of trouble with 2.5.0
I am guessing, but I suggest to uninstall OpenCPN entirely, and re-install 2.5.0. You may have interference between 2.6 and 2.5

Thanks
Dave
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Old 27-12-2011, 09:10   #13
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Re: grib display on open CPN

Hi Dave,

your suggestion fixed the problem. I uninstalled 2.6 (leaving the preferences in place) then re-installed 2.5. Now the isobars etc display as they should. I can't remember whether the 2.5 that was installed and had the same problem was an overwrite of 2.4 or a clean install. Maybe we should always uninstall a previous version first rather than upgrade?

I have downloaded gribs from Saildocs to simulate a grib obtained via Winlink using Airmail, and happily it also displays correctly.

Many thanks to all for your suggestions and a Happy New Year.

Ian Amel Super Maramu 2000 'Crusader'
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Old 27-12-2011, 09:25   #14
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Re: grib display on open CPN

I should have added that this problem arose on two different laptops, both running 2.5 at the time. Both may have been upgraded with 2.5 rather than clean installed, so there may indeed be a problem if an upgrade is performed rather than uninstalling the previous version first.


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Ian (Biggles)
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Old 29-07-2012, 11:43   #15
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Re: grib display on open CPN

Hi all,
I can't display .grb grib files (from metoconsult as example): file doesn't appear in window
I can only display .bz2 (actually .grb.bz2)
renaming grb files in .bz2 doesn't help
I am with W7 & OCPN 3.02
Thanks for your help
Michel
NB: OCPN is just great
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