[Geoserver-users] Adding/Subtracting time dimention

Hello,

I'm searching for a way to make time based arithmetic, specifically addition
and subtraction, from different time dimensions.
I have a single raster data (NetCDF) with hourly precipitation over 5 days
and would like to make something like a rolling sum over different periods
(3h, 12h, 24h and 5d).
A SDL solution would be preferable, but if anything works, i'd be glad.

I'm sorry if this is already done, but i could not find it so far.

Thank you,

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Hi,
if I’m not mistaken existing cql\filtering math functions [1] will convert the date to a number automatically.

That say, is not clear to me what you intend to do but you may want to have a look at the following functionalities:

I doubt they will support your case out of the box, but they can be an inspiration for a solution.

Best regards,
Nuno Oliveira

[1] https://docs.geoserver.org/latest/en/user/filter/function_reference.html#math-functions

On Tue, 2020-02-11 at 06:31 -0700, Lucas Cantos wrote:

Hello,

I'm searching for a way to make time based arithmetic, specifically addition
and subtraction, from different time dimensions.
I have a single raster data (NetCDF) with hourly precipitation over 5 days
and would like to make something like a rolling sum over different periods
(3h, 12h, 24h and 5d).
A SDL solution would be preferable, but if anything works, i'd be glad.

I'm sorry if this is already done, but i could not find it so far. 

Thank you,

--
Sent from: [http://osgeo-org.1560.x6.nabble.com/GeoServer-User-f3786390.html](http://osgeo-org.1560.x6.nabble.com/GeoServer-User-f3786390.html)

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Regards,
Nuno Oliveira
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Jody Garnett

Thank you kindly for your answer. I read through the tutorials and
references, but did not found what I was looking for, because all thoses
transformations are applied only to a single time step(dimention).

What I'm looking for is a way to make interactions on the time dimentions
(equations using different datetimes)

But thank you again for your help.

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