comp.lang.idl-pvwave archive: archive » Re: Get Lat/long equivalent based on NEASE grid value

Home » Public Forums » archive » Re: Get Lat/long equivalent based on NEASE grid value

Show: Today's Messages :: Show Polls :: Message Navigator
E-mail to friend

Re: Get Lat/long equivalent based on NEASE grid value [message #72964 is a reply to message #72963]

Thu, 21 October 2010 12:28

David Fanning
Messages: 11724
Registered: August 2001

Senior Member

Snow53 writes:

> I'm not doing any sort of transformation on the data (WGS-84 was
> defined at the datum in the data hdr file I got with these data).
>
> What I want to do is a quick geographic-based masking of these files ,
> i.e. anything <50 deg N gets masked as -9999. The way the spherical
> NEASE coordinates are set up makes this more difficult to do, so I had
> this idea that I would just get the lat/long equivalent and use that
> to define the mask criteria (but no easy lunch, right? :) ).

Well out of the realm of my expertise now. :-)

You can probably locate the files you need here:

http://nsidc.org/data/ease/tools.html

The errors you introduce with a WGS-84 datum are small
compared to what you want to use it for. :-)

Cheers,

David

--
David Fanning, Ph.D.
Fanning Software Consulting, Inc.
Coyote's Guide to IDL Programming: http://www.dfanning.com/
Sepore ma de ni thui. ("Perhaps thou speakest truth.")

Report message to a moderator

[Message index]

		Re: Get Lat/long equivalent based on NEASE grid value By: David Fanning on Thu, 21 October 2010 12:46
		Re: Get Lat/long equivalent based on NEASE grid value By: Snow53 on Thu, 21 October 2010 12:33
		Re: Get Lat/long equivalent based on NEASE grid value By: David Fanning on Thu, 21 October 2010 12:28
		Re: Get Lat/long equivalent based on NEASE grid value By: Snow53 on Thu, 21 October 2010 12:18
		Re: Get Lat/long equivalent based on NEASE grid value By: David Fanning on Thu, 21 October 2010 12:04
		Re: Get Lat/long equivalent based on NEASE grid value By: Snow53 on Thu, 21 October 2010 11:50
		Re: Get Lat/long equivalent based on NEASE grid value By: David Fanning on Thu, 21 October 2010 11:39

Previous Topic:	Get Lat/long equivalent based on NEASE grid value
Next Topic:	Re: fun with nonlinearity and COLORBAR

-=] Back to Top [=-

[ Syndicate this forum (XML) ] [

] [

]

Current Time: Sun Oct 12 08:16:13 PDT 2025

Total time taken to generate the page: 1.92237 seconds