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Re: NetCDF/Java at NSIDC

Hi Siri:

Yes, but I cant do it until probably end of May. Im gone for 3 weeks starting next week, so I will contact you when Im back.

Ill probably create a bare bones IOSP for you that your programmers can study a bit, then we can do a few hours together to help you start to extend it to more of your datasets. How does that sound?

If you need any help before then, contact address@hidden, and others at Unidata will help.


On 3/30/2013 9:13 AM, Siri Jodha Singh Khalsa wrote:
Hi John,

Thanks for what you've done so far in looking at the datasets we're considering working with using the netCDF/JAVA stack. You brought up a good point about the projection information. I wasn't expecting you to do any coding, but I'm no closer to understanding what level of effort is required to get the software working with these data. Let me go back to my original question - would you be willing to give an orientation talk to our developers?

Best wishes,

On 3/29/13 3:18 PM, John Caron wrote:
Hi Siri:

Sorry, Ive been swamped. The IOSP work isnt particularly hard. I thought
I might get one done to show you, but didnt have time. I can give you a
sample IOSP that you could continue to develop. Probably couldnt get it
to you until May though.

Im not sure what I can tell you more concretely at this moment. If you
want to include us for a part of the Access proposal $, we could
continue to provide you with support as you develop the project.


On 3/24/2013 3:24 PM, Siri Jodha Singh Khalsa wrote:
Hi John,

The notice of intent to submit a proposal is due in about a week.

Any progress on scoping IOSPs for the mentioned data types?


On 3/12/13 5:35 PM, John Caron wrote:
Hi Siri:

trying some random ones, i notice that the last link


is broken.

i assume all the others starting with NSIDC are in your bespoke
format, eg

"Near-Real-Time DMSP SSM/I-SSMIS Pathfinder Daily EASE-Grid Brightness

is not in DMSP format, but uses this format:

i also vaguely remember that you had a java library that implemented
your projections. is that available?


On 3/12/2013 4:57 PM, Siri Jodha Khalsa wrote:
Hi John,

I'll point you to some guide documents (which are maintained for every
dataset we distribute). Data access is pointed to from these pages.
Actually, what we'd like to do, eventually, is rebuild SAGE
<http://nsidc.org/data/sage/index.action> using services enabled through
netCDF. Right now SAGE is based on a lot of custom IDL code using a java
db bridge to access data. If you follow the sage link, and look at the
user guide tab, you'll see links to the data catalog pages. But, I
reproduce here:


Data Set Title
DMSP SSM/I Pathfinder Daily EASE-Grid Brightness Temperatures
AVHRR Polar Pathfinder Twice-Daily 5 km EASE-Grid Composites
Greenland Ice Sheet Melt Characteristics Derived from Passive
AMSR-E/Aqua Daily EASE-Grid Brightness Temperatures
GLAS/ICESat 1 km Laser Altimetry Digital Elevation Model of
Near-Real-Time DMSP SSM/I-SSMIS Pathfinder Daily EASE-Grid

MODIS/Terra Land Surface Temperature & Emissivity 8-Day L3 Global
1 km
SIN Grid V005

let me know what you think.


On 3/12/13 4:38 PM, John Caron wrote:

send me some sample files (and docs) so i can scope the difficulty.

On 3/12/2013 4:18 PM, Siri Jodha Khalsa wrote:
Hi John,

I've gotten a tentative green light from NSIDC to pursue funding under
the NASA ROSES ACCESS call to build services on our heritage SSM/I
(binary formatted) data as well as possibly our EOS HDF4 and HDF5
The awards are relatively small and there is some skepticism here
regarding the effort it will take to get the library up and running on
our data.

Would you be willing to visit NSIDC to talk with some developers to
describe what would be involved, and the benefits that would be
through the netCDF/Java stack.


Siri-Jodha Singh KHALSA, Ph.D., SMIEEE
National Snow and Ice Data Center
University of Colorado
Boulder, CO 80309-0449 Phone: 1-303-492-1445 GV: 1-303-736-9976

SiriJodha Singh KHALSA, Ph.D.
Cooperative Institute for Research in Environmental Sciences
University of Colorado, Boulder, CO 80309-0449
Office: 1-303-492-1445 GV: 1-303-736-9976

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