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Re: [ferret_users] Transformation: curvilinear to rectangular issue



Hi Szymon,
Indeed, seems the island Bornholm is shed into the Baltic. Beware off the tsunami. I cannot help you to find the error source in your grid transformation. Nevertheless, do you believe in etopo2 in
the Baltic Sea? Depth of less than 10 m in some areas?

You may want to get a better data set from here:

http://www.io-warnemuende.de/topography-of-the-baltic-sea.html

Greetings,
Martin

Szymon Roziewski wrote:
Dear Ferreters,
I have interpolated some data from curvilinear coordinates into regular.
First of all I computed the array of coefficients of a transform and then I did transform. But what I got as a result somehow embarrassed me because on the left bottom side picture I have a blurred data and I don't know why.
I attach two pictures.
The first one that I called INPUT_etopo2 is an input of the transform on curvilinear grid. The second is a print of interpolated data onto rectangular grid but with a blur.
The region which I concentrated on was
X=-5.7:5.5
Y=-2.5:10:0
What has caused this smear? What do you think?

Kind regards,
Szymon Roziewski

Attachment: iow_topo.gif
Description: GIF image


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