[IDV #CQF-979333]: export satellite image to netcdf

> It seems like it works for the first 65000 pixels.  Must be a size limit
> with excel spreadsheets.
> 

You can try extractLongitudeFromNWPGrid now if you download the nightly build, 
it will not have a size limit. :)


Yuan
> 
> >> I'm not sure if you have time to revisit this, but I thought I'd ask
> >> since perhaps other people are back from Christmas break.  You were
> >> right: it can take a very long time to cut-and-paste.  You warned me
> >> about this earlier, but when I first tried it, it took less than 5
> >> seconds.  I don't know if my test case was adequately sized, or if I
> >> passed some threshold, but it took about half an hour for one
> >> cut-and-paste action.  And that just one of 2000 or so times.  Is there
> >> any other way to get out the lat and lon information from the satellite
> >> image?
> >>
> > Hi David,
> >        The answer is yes. To it you need to: first save the image to a nc 
> > grid file, and then load the nc file back to the IDV and use the "Formulas> 
> >  Export>  Export Grid to Excel" in the Field Selector to create the excel 
> > file with lat/lon.
> >
> >> I've done a variety of things.  I tried a jython function on the IDV
> >> webpage
> >> http://www.unidata.ucar.edu/software/idv/docs/userguide/tools/JythonLib.html
> >> called|extractLatitudeFromNWPGrid|.   I was able to extract the latitude
> >> of each pixel in the satellite image, but I could not figure out how to
> >> extract longitudes.  I tried the command "extractLongitudeFromNWPGrid",
> >> but it doesn't seem to exist.  Oddly there is no corresponding jython
> >> function for longitude...
> > No, the extract function for longitude is no there. I think extract 
> > latitude function is a side product of creating coriolis grid.
> >
> > Yuan
> >
> >>
> >>
> >>
> >>
> >>> Hi David.
> >>>
> >>> Dashboard -->   Field Selector Tab  -->   Displays Panel -->   General 
> >>> -->   Grid Table -->   Create Display
> >>>
> >>> This action will produce a data table.
> >>>
> >>> Copy and paste your data into a text file.
> >>>
> >>> -Julien
> >>>
> >>>> Thanks for the heads up about PTO.   Here's an .xidv file.
> >>>>
> >>>> Have a good vacation!
> >>>>
> >>>>
> >>>>
> >>>> On 12/21/2010 03:19 PM, Unidata IDV Support wrote:
> >>>>> Hi David.
> >>>>>
> >>>>> At this point I need to know more about the data you are looking at. 
> >>>>> Please send over some bundles and / or put some data files at 
> >>>>> http://motherlode.ucar.edu/repository/alias/idvupload.
> >>>>>
> >>>>> Thanks.
> >>>>>
> >>>>> -Julien
> >>>>>
> >>>>> PS I am on PTO for the next couple of days so support may be slow  with 
> >>>>> the upcoming Christmas holiday. I will be around next week though.
> >>>>>
> >>>>>
> >>>>>> Hi Julien  -
> >>>>>>
> >>>>>> I did what you suggested, but the results look similar to before. The 
> >>>>>> nc
> >>>>>> file still has no lat/lon arrays.  Maybe I'm not doing what you
> >>>>>> suggested correctly  When you say "sub-setting", is that what I did 
> >>>>>> when
> >>>>>> I requested a 600x1100 pixel grid centered on 14.5N -68 E in the Data
> >>>>>> Choosers panel? Or is it something more?
> >>>>>>
> >>>>>> --Dave
> >>>>>>
> >>>>>>
> >>>>>>
> >>>>>>> Hi David.
> >>>>>>>
> >>>>>>> I would generate the image you want (sub-setting the data as you 
> >>>>>>> wish) in the projection you want and then:
> >>>>>>>
> >>>>>>> Dashboard -->     Displays Tab -->     File Menu -->     Save -->     
> >>>>>>> Export displayed data to netCDF
> >>>>>>>
> >>>>>>> Give that a shot and let us know how it goes.
> >>>>>>>
> >>>>>>> -Julien
> >>>>>>>
> >>>>>>>> Full Name: David ahijevych
> >>>>>>>> Email Address: address@hidden
> >>>>>>>> Organization: ncar
> >>>>>>>> Package Version:
> >>>>>>>> Operating System:
> >>>>>>>> Hardware:
> >>>>>>>> Description of problem: First I'll state my goal. If you know a way 
> >>>>>>>> to do this, then perhaps my netCDF question is irrelevant.  
> >>>>>>>> Ultimately I'd like to calculate the mean IR cloud top temperature 
> >>>>>>>> in concentric rings around a tropical storm.
> >>>>>>>>
> >>>>>>>> My netCDF question is: how to I export the 2-D lat/lon arrays with 
> >>>>>>>> the image?  I exported the image array using exportGridToNetcdf, but 
> >>>>>>>> it is in satellite projection and I don't know how to convert that 
> >>>>>>>> to lat/lon.
> >>>>>>>> Thanks - !
> >>>>>>>>
> >>>>>>>>
> >>>>>>>>
> >>>>>>> Ticket Details
> >>>>>>> ===================
> >>>>>>> Ticket ID: CQF-979333
> >>>>>>> Department: Support IDV
> >>>>>>> Priority: Normal
> >>>>>>> Status: Closed
> >>>>>>>
> >>>>> Ticket Details
> >>>>> ===================
> >>>>> Ticket ID: CQF-979333
> >>>>> Department: Support IDV
> >>>>> Priority: Normal
> >>>>> Status: Closed
> >>>>>
> >>>>
> >>> Ticket Details
> >>> ===================
> >>> Ticket ID: CQF-979333
> >>> Department: Support IDV
> >>> Priority: Normal
> >>> Status: Closed
> >>>
> >>>
> >>
> >>
> >
> > Ticket Details
> > ===================
> > Ticket ID: CQF-979333
> > Department: Support IDV
> > Priority: Normal
> > Status: Closed
> >
> 
> 


Ticket Details
===================
Ticket ID: CQF-979333
Department: Support IDV
Priority: Normal
Status: Closed