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RE: [mget-help] help with interpolation of satellite rasters at points (or downloading the rasters themselves)


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  • From: Jason Roberts <>
  • To: Linda Waters <>, "" <>
  • Cc: "" <>
  • Subject: RE: [mget-help] help with interpolation of satellite rasters at points (or downloading the rasters themselves)
  • Date: Mon, 9 Jul 2018 17:57:01 +0000
  • Accept-language: en-US
  • Spamdiagnosticmetadata: NSPM
  • Spamdiagnosticoutput: 1:99

Hi Linda,

 

Sorry for my slow reply. I have been busy with travel and meetings that will finally wrap up at the end of this week. I will be more available starting next week.

 

What versions of MGET and ArcGIS do you have? Shaun’s suggestion was the right thing to try (thanks Shaun!). However I did update MGET to use the https URL instead of http for communicating with the NASA OceanColor. Looks like this change was made January 2017. So perhaps you could try upgrading your MGET? There are some more recent changes that are relevant to NASA OceanColor data that you might want to have.

 

However I do not believe that would be the reason for the SSLError that you are now seeing. In the past, I have seen similar errors when old versions of Python are used to communicate with modern web servers. What version of ArcGIS do you have? (This will determine which version of Python you are using.)

 

Best,

Jason

 

 

From: <> On Behalf Of Linda Waters
Sent: Friday, July 6, 2018 4:58 PM
To:
Cc:
Subject: Re: [mget-help] help with interpolation of satellite rasters at points (or downloading the rasters themselves)

 

Thanks Shaun,

 

That was a good idea. I edited the web address the https version in the multiple places I could find where it was trying to access the website in the python script. I notice that I can access the pages through a browser if I use https instead of http, but in MGET now I get a different error message; I think it isn't expecting ssl.

 

Failed to query the NASA OceanColor server at https://oceandata.sci.gsfc.nasa.gov/api/file_search.cgi. The HTTP request failed with SSLError: [Errno 185090050] _ssl.c:340: error:0B084002:x509 certificate routines:X509_load_cert_crl_file:system lib. Retrying...

 

 

On Fri, 6 Jul 2018 at 16:06, Shaun Walbridge <> wrote:

Hi Linda,

 

You could try and update the URL, this may be the correct updated location:

  https://oceandata.sci.gsfc.nasa.gov/api/file_search

 

If there isn’t any immediate way to do that through the UI, you can try and modify the underlying Python script that is being executed, OceanColor.py:

 

https://code.env.duke.edu/projects/mget/browser/MGET/Branches/Jason/PythonPackage/src/GeoEco/DataProducts/NASA/OceanColor.py

 

That should be located within the installation of MGET. You may want to create a backup copy in case anything goes wrong modifying the file, but it should be easy enough to change the URL. It’s on line 315, which currently reads:

 

    url = "'https://oceandata.sci.gsfc.nasa.gov/search/file_search.cgi'

 

Cheers,
Shaun

 

 

Dear MGET-help/  Jason Roberts:

 

I am having a problem with accessing some L3 products, either interpolated at a few points for specific dates (preferable) or as rasters. I was trying to access this information in a hurry to fix a problem with a paper and avoid having to withdraw it and go through the review process all over again, so any quick help you can provide would be very welcome, even if it's to suggest an alternate method. I keep encountering the following error no matter what L3 product / satellite / time frame I choose:

 

Running script OceanColorLevel3SMITimeSeriesInterpolateAtArcGISPoints...

Failed to query the NASA OceanColor server at http://oceandata.sci.gsfc.nasa.gov/search/file_search.cgi. The HTTP request failed with error: [Errno 10060] A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond. Retrying..

It then retries and ultimately fails, making me think that perhaps the web address for the data has changed.

 

Thanks for any guidance.

 

Sincerely,

Dr. Linda Waters


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