| Re: problem with subset one image by another [message #59441 is a reply to message #59335] |
Wed, 26 March 2008 12:52   |
jameskuyper
Messages: 79
Registered: October 2007
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Member |
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negra wrote:
> On 22 О©╫О©╫О©╫, 22:12, David Fanning <n...@dfanning.com> wrote:
>> negra writes:
>> Well, there probably is nothing easier than this in IDL,
>> either, so I think folks are either waiting for you to
>> realize this or waiting for you to explain in a little
>> more detail exactly what it is you are trying to do. :-)
>>
>> Cheers,
>>
>> David
>> --
> I have a large number of georeferenced MODIS images in ENVI. And it's
> just attempt to get rid from leaving for area of interest of
> territory.
Are these Level 2 images, or Level 3? Level 2 products are organized
around 5-minute granules of data, and are generally in HDF-EOS Swath
format. For best results, a Geolocation (MOD03 or MYD03) file should be
used for georeferencing such data.
Level 3 images are rebinned to a rectangular grid in som particular map
projection (often sinusoidal), and are stored in HDF-EOS Grid format.
The techniques that should be used are somewhat different in the two cases.
And, as David said, we need a whole lot more details about what it is
you are trying to do.
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