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[THREDDS #LMW-340107]: Question About Displaying Satellite Data From Thredds Server In IDV

Hi Jacob-

> Hey, this is the same Jacob that uses the email address,
> address@hidden.

I was guessing that, thanks for the confirmation.

> Thanks for the information.  I am actually not at the CPU that contains
> the IDV software, but I will certainly try your first suggestion once I
> get home.  When I load the satellite data from the Catalog into the
> Field Selector, I have the option of displaying the data through either
> a contour plan view or I think like you said, the color shaded plan
> view.  I have not tried the color shaded plan view; I just went with the
> contour plan view.

Yes, since they are tagged as grids, you'll get the same options as
something like Sea Level Pressure from the real grid datasets.  However,
since satellite images have lots of edges and variations of values over
small distances, the contouring will use a lot of memory.
  

Since the same options that I have for the images
> from the satellite chooser did not appear in the Field Selector for the
> data from the Catalog, I just guessed that the data type was incorrect.
> However, I will try the color shaded plan view.  So you are saying
> that if I load the data in through the color shaded plan view, I will
> get a satellite image?

Yes, with the caveats that the color table will not be the gray
image and the range will not be 0 to 255.  If you set them manually,
it should look like a regular image.

> Yeah, in regards to one of your points, I have seen that I cannot
> interact with the data from the catalog like I can the satellite
> chooser; however, for my current research, I am trying to retrieve
> archive satellite imagery from the March 14 & March 15 2008 Tornado
> Outbreak.  I usually depend on the satellite chooser for current data.
> When you speak of Aggregated Grib files, do you mean that when I load
> the data in from the Catalog, I should load them in as that data type?
> I think I have been leaving it as the default option.  I'll try that as
> well.

Select the Aggregated Grib files if you select multiple images and want
to look them.  If you just have one image, then the default will be okay.

> I do appreciate all the valuable information.  This has helped and I
> will try your suggestions once I arrive home.  I look forward to all
> future plans for the IDV!  By the way, you may know my current
> instructor from NC State University, Dr. Gary Lackmann?  He has been an
> excellent instructor and he informed me last semester that he has been
> in contact with IDV Support.

Gary is the chair of the Unidata User's Committee so I know him well.
He'll be out here next month for the next meeting.

> Take care and I look forward to hearing from you.

My e-mail will be sporadic for the next week as I'm in FL until
next Wednesday on some family business.  Say hi to Gary for
me.

Don

> Unidata IDV Support wrote:
> > Hi Jacob-
> >
> > This is Don.
> >
> >> Alright.  I appreciate your help with that.
> >
> > At this point, the data gets loaded in as a Grid data type since that's
> > how they are specified in the catalog.  So, if you try to do a color
> > shaded plan view, you will end up with the default color table and
> > a range based on the data.  For images, we usually default to the
> > gray color table and a range of 0 to 255.
> >
> > So, when you say that they are not displaying right, is that possibly
> > what you are seeing?  If not, can you send a picture of what they
> > are displaying as?
> >
> > Some other points:
> >
> > - there is no good way of getting the last N images like you
> > can in the satellite chooser through ADDE.  You can select
> > a set of images and use the Aggregated Grib files data source
> > type to create a loop.  You should subset the images before
> > loading them in because some are huge.
> >
> > - These are the same images that are in the GINIEAST, GINIWEST
> > and GINICOMP datasets through the Satellite Image chooser.
> > You have much more flexibility on subsetting and time selection
> > than through the catalog.
> >
> > - we eventually hope to have a similar data selection and subsetting
> > interface to these cataloged datasets as we have for the ADDE images.
> > But that is a ways off.
> >
> > Don.
> >
> >> Unidata THREDDS Support wrote:
> >>> I tested the following random file from that catalog, and it worked ok in 
> >>> CDM:
> >>>
> >>> http://lead.unidata.ucar.edu:8080/thredds/dodsC/satellite/WV/EAST-CONUS_4km/20080315/EAST-CONUS_4km_WV_20080315_0131.gini
> >>>
> >>> im transferring this question to IDV support for further investigation
> >>>
> >>>
> >>>> Hey;
> >>>> Sure.  I located this specific data set:
> >>>> http://lead.unidata.ucar.edu:8080/thredds/catalog/satellite/WV/EAST-CONUS_4km/20080315/catalog.xml
> >>>> Thanks!
> >>>> Jacob
> >>>> Student at North Carolina State University
> >>>>
> >>>>
> >>>> Unidata THREDDS Support wrote:
> >>>>>> Hello;
> >>>>>> I have a question regarding the display of archive GOES satellite data
> >>>>>> from the http://lead.unidata.ucar.edu:8080/thredds/catalog.xml catalog
> >>>>>> in the IDV.  I tried to load individual satellite data from this
> >>>>>> catalog, but the IDV will not display the data properly and I was
> >>>>>> wondering if this is due to the satellite data being in gini format and
> >>>>>> not area format.  If that is the case, how can I properly display the
> >>>>>> satellite data in the IDV and is there another source for archive
> >>>>>> satellite data?  I am specifically interested in archive water vapor
> >>>>>> satellite data.
> >>>>>> Thanks for your time.
> >>>>>> Jacob
> >>>>>> Student at North Carolina State University
> >>>>>>
> >>>>>>
> >>>>> Hi Michael:
> >>>>>
> >>>>> Can you give me a specific dataset that's failing?
> >>>>>
> >>>>>
> >>>>> Ticket Details
> >>>>> ===================
> >>>>> Ticket ID: LMW-340107
> >>>>> Department: Support THREDDS
> >>>>> Priority: Normal
> >>>>> Status: Open
> >>>>>
> >>>
> >>> Ticket Details
> >>> ===================
> >>> Ticket ID: LMW-340107
> >>> Department: Support THREDDS
> >>> Priority: Normal
> >>> Status: Open
> >>>
> >>
> >
> >
> > Ticket Details
> > ===================
> > Ticket ID: LMW-340107
> > Department: Support IDV
> > Priority: Normal
> > Status: Open
> >
> 
> 


Ticket Details
===================
Ticket ID: LMW-340107
Department: Support IDV
Priority: Normal
Status: Open