Dear Ben:
My friend find the problem and solve it.
I use "Grid Series", after set up and paste data, the data need some change.
Between water and land's data must be only -2 and 10, if water' data is between -2 to 10, replace by -2 (land is 10, water is -2, it can't be -2~10 number).You can use Matlab to change data.
Is that right? any problem?
and you're right, Ben, thank you very much!
Emily