Re: [Geotools-gt2-users] Issue when rendering coverages with bicubic interpolation

[Jody G. <jod...@gm...>]

 Hi Topias,

I am not close enough to this code to know if it is a bug, but I like that
your fix includes an example.

It would be preferable to know exactly where CRS.transform is producing a
null reference, perhaps by stepping through with a debugger, to determine
if that code could be made more robust. Your example does not show the same
request passing or failing based on interpolation method.

- -
Jody Garnett


On Mar 18, 2025 at 10:54:20 AM, Topias Rusanen <top...@fl...>
wrote:

> Hello,
>
>
>
> I’m currently experiencing issues when rendering coverages with bicubic
> interpolation on GeoTools 32.1.
>
>
>
> When rendering my coverage, the API returns a null reference, which per
> documentation would state that the coverage does not intersect the area to
> be rendered. However, if I disable interpolation, the area is rendered fine
> albeit the result is ugly.
>
>
>
> I created a fork of the main repo and was able to reproduce the issue in
> unit tests. A simple CRS transformation would solve my issue, see the
> modified unit test and a fix for the rendering issue in here:
> https://github.com/FluiditLtd/geotools/commit/9a8fd3ebdb4321957c7f7dc10d290e36b25f7d04
>
>
>
> My question is: Is this a bug? If this is indeed a bug, I can create a PR
> from the fork if the fix is deemed adequate.
>
>
>
> Best regards,
>
>
>
> Topias Rusanen
>
> Software Team Lead
>
> Fluidit Oy
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