I have just downloaded daily mapped Chl_a files from SeaWiFS. I would like to ask that Chl_a is converted into log10 before or not yet.
I intend to extract the data for the region from 0-24 N, 99-121 E, so it is OK if I use the mapped product or I have to use L3bin product?
And, because this is the first time I use Chlorophyll, could you please introduce me some documents about this kind of data?
Thank you in advance for your reply.
The chlorophyll data in our mapped files have not been log transformed;
they are stored as 32-bit floating-point geophysical values with units
of milligrams per cubic meter.
The mapped products are made from the corresponding binned products.
They are somewhat easier to work with than the binned products, but
they contain less information than the binned products.
Please spend some time looking over our on-line documentation.http://oceancolor.gsfc.nasa.gov/DOCS/
Thank you for your answer.
I have another question. I have just downloaded a binned file of chlor_a. I used matlab to import data and the size of chlor_a is 1x444025. How can I extract the data for the region 99-121E, 0-24N, and reshape its size to m x n?
I'm sorry I don't understand one thing. You said that "the binned product contains more information than the mapped product". It means that when the binned product is transformed to the mapped product, some data disappear??? If I extract the data from the binned product and reshape it to m x n, I have the same problem??? Could you please explain clearly me this problem?