Subject: Marine Geospatial Ecology Tools (MGET) help
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| From: | "Jason Roberts" <> |
|---|---|
| To: | "'Ecem Oner'" <>, <> |
| Cc: | <> |
| Subject: | RE: [mget-help] Marine Geospatial Ecology Tool |
| Date: | Thu, 17 Jan 2013 14:42:48 -0500 |
Dear Ecem, I’m afraid that the tool I mentioned is not going to work with the OMI data you are interested in. The problem is that the data is in HDF5 format, and the tool I mentioned only works with HDF4 format (specifically, HDFEOS, which is a specialization of HDF4). This page discusses some of the difficulties with accessing OMI level 2 data. You have probably already seen it. I do not have any immediate suggestions on how you can accomplish this task without programming. I do not know of a tool that can convert level 2 data in HDF5 format to something usable within ArcGIS. Do you have some skills with Python? If so, you might be able to accomplish it. I recently discussed a similar problem with someone who wanted to access VIIRS data in HDF5 format. I will forward that email to you privately. From that, you might be able to develop a workflow running GDAL utilities from the command line. I hope that helps. At some point over the next year, I hope to add HDF5 support to MGET, as well as merge the level 2 tool I mentioned into MGET. But unfortunately this is not a high priority for me right now so I cannot promise anything for you in the short term. Sorry I could not help more, Jason From: Ecem Oner [mailto:] Dear Jason, First of all,I would like to thank you for your respond,clarification and help immediately. We are going to download OMI satellite's level 2 and Level 2 G data from Nasa's web site using (http://mirador.gsfc.nasa.gov/) link. You can type nitrogen dioxide in the keyword field, set a spatial region (if you want, or use the default full global), and set the date range for the data you want. Then proceed from there to download the data files. Actually,I will sending for example 2 files(via wetransfer) we want to open in ArcGIS.As you have mentioned, I cannot use the traditional MGET HDF conversion tools to convert the data to ArcGIS-compatible format. Unfortunately,I have read your discussion board but I could not see any link or something else about your mentioned other tool,how can I reach this tool ? Also,do you guess any idea your mentioned tool is going to work with our wanted files? Thank you very much in advance for your support and help on this. I am looking forward to hear from you as soon as possible. Please do not hesitate to get in touch with me if you would like to get additional clarification on any of the topics mentioned above. Yours sincerely, From: Jason Roberts <> Dear Ecem, I’m sorry for the lack of clarity on Windows 64-bit. I realized that the download page was not very clear about 32-bit and 64-bit. I just modified the page clarify it. Please let me know if that looks better. In short: MGET runs fine on Windows 64-bit. Because ArcGIS Desktop 10.1 itself is 32-bit, the Python and MGET you use with it are also 32-bit (also called “x86”). It is only if you need to use the ArcGIS Desktop 10.1 64-bit Background Geoprocessing that you would need the 64-bit version of MGET. This version of MGET is still in development. We do not have an ETA for its completion at this time, but I would guess it will be within the next six months. Your project sounds interesting. Regarding the satellite data. If these data are truly “level 2” satellite data—i.e. they are swaths rather than grids—then you probably cannot use the traditional MGET HDF conversion tools to convert the data to ArcGIS-compatible format. Level 2 data is difficult to work with from ArcGIS. See this discussion for some more information. As I mention in that discussion, I have a separate tool for level 2 data in HDF-EOS format. That tool might work with your data. If you can send me a link to the place you download the data from, I can give you a better idea what is needed. Best regards, Jason From: Ecem Oner [] Dear Sir/Madam, I am an environmental engineer studying towards my MSc degree at Istanbul Technical University.My graduation thesis will be about ''Improvement of NOx emissions with satellite NO2 retrievals and ground observations (IMNOXE)'' which is an European Union founded project. In the scope of this project NASA's OMI satellite's (level 2) data is planned to be used. We have been using ArcGIS software during project and to read hdf data we need marine geospatial ecology tool. Additionally,we need this tool for ArcGIS Desktop 10.1 for windows 64-bit.At your web site it is seen that it is under development .So we would like to know when is it prepared for downloading or do you have any idea about what we will use like this tool until mget tool prepared because it is urgent for us. Thank you very much in advance for your support and help on this. I am looking forward to hear from you as soon as possible. Please do not hesitate to get in touch with me if you would like to get additional clarification on any of the topics mentioned above. Yours sincerely,
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