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RE: [ferret_users] regriddidng

Ansley, Paulo,
thank you very much for yours prompt answers but it wasn't exactly what I need. I've studied ferret documentation before I asked my question to the mailing-list but have not found answer.

My problem, in other words, is that I have satellite ice concentration on grid 1280x720 (x=1:1280:1/y=1:720:1) and modeled ice concentration on grid 5120x2880 (x=1:5120:1/y=1:2880:1) (see attached figures).
I want to draw satellite ice concentration on modeled ice. What I know is that every fourth fine resolution grid point is in the same place as coarse grid point. So for instance coarse resolution value of concentration of x=10/y=10 should be at fine resolution grid x=40/y=40, but there is no value for x=39/y=39 (interpolation is needed) and so on,
Thanks in advance,

From: owner-ferret_users@xxxxxxxx [owner-ferret_users@xxxxxxxx] on behalf of Ansley Manke [ansley.b.manke@xxxxxxxx]
Sent: Tuesday, November 10, 2015 9:19 AM
To: ferret_users@xxxxxxxx
Subject: Re: [ferret_users] regriddidng

Hi Robert,
This is a one-line command in Ferret.  You have several options for the regridding transformation; by default it's a linear interpolation.
Perhaps the best thing to point you to is the regridding demo.  From the Ferret command line,

yes? go regridding_demo

The command window has description and comments along with the Ferret commands; and you'll get plots showing what is going on.

If you're a new user, welcome! I'd suggest exploring this page,


On 11/10/2015 2:56 AM, Osinski, Robert FORNATL, PL wrote:
Dear ferreters,
I need your help in interpolating and drawing two datasets. The first data set is on coarse grid x=1:1280:1/y=1:720:1 and the second on fine one x=1:5120:1/y=1:2880:1. Each 4th grid point in the fine grid is the same as in coarse resolution grid in space so
coarse res. grid point    fine res. grid point 
(1,1)                            (4,4)
(1,2)                            (4,8)
(2,2)                            (8,8)
I need to draw variable which is defined on coarse grid, on fine grid. Obviously there will be "empty" grid points on fine grid so it should be interpolate,
Thanks in advance,
Robert Osinski
Monterey, CA

Attachment: ice_conc_1280_720.tiff
Description: ice_conc_1280_720.tiff

Attachment: ice_conc_5120_2880.tiff
Description: ice_conc_5120_2880.tiff

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