[QGIS-Developer] R: GSoC 2021 QGIS On-the-fly Raster Calculator proposal draft review and feedback

[Francesco Bursi]

Hi Alessandro,

First of all thank you for your feedback (let's hope for the best) and for your work.
I did not forget your comment in my previous thread and I studied (I'd rather say I read, due to limited amount of time left) the existing documentation, I saw that hillshade benefits of openCL acceleration too.
In fact, I discussed with mentors some extra features for the (possible, hopefully) new renderer (I think in the comment history you'll find openCL) but since openCL would add some extra complexities that maybe I wouldn't be able to manage in the GSoC coding time, I left it out of the proposal for the time being, and I added some possible modification and improvements to the raster calculator engine instead.
By the way, and this is besides GSoC, the use of that framework and the possible results thrilled me and I'd like to improve the existing renderer feature for example. Given my knowledge of the topic at the moment this is more of an idea than a serious commitment but I'd like to to elaborate further this subject in the near future.

Sorry for the long message, I hope my thoughts about it are clear.

Kind Regards,
Francesco Bursi
________________________________
Da: Alessandro Pasotti <apasotti at gmail.com>
Inviato: lunedì 12 aprile 2021 15:02
A: Francesco Bursi <francesco.bursi at hotmail.it>
Cc: qgis-developer <qgis-developer at lists.osgeo.org>
Oggetto: Re: [QGIS-Developer] GSoC 2021 QGIS On-the-fly Raster Calculator proposal draft review and feedback

On Mon, Apr 12, 2021 at 2:20 PM Francesco Bursi
<francesco.bursi at hotmail.it> wrote:
>
> Hello QGIS Dev,
>
>
> I’m Francesco Bursi, an M.Sc. civil engineer from Italy currently enrolled in a Master of Advanced Studies (Level 8 EQF) in giscience and geoinformatics at the University of Padua.
>
> I’m really interested in the QGIS (possible) new rendering feature that involves raster calculator capabilities, I've already discussed the project with mentors Martin Tobias and Peter Petrik and possible co-mentor Roberto Marzocchi,  they gave me a lot of feedback and advice for the project.
> I would like to share my proposal with you before the final submission. Don't hesitate to give me feedback and ask me question/clarification or point me out what's missing.
>
>
> proposal 2021
>
>
> I'm open to advice, remarks and criticism in order to improve.
>
> I am looking forward to a feedback, thank you for your time.
>
>
> Best regards,
>
> Francesco Bursi
>


Hi Francesco,

your proposal looks very interesting to me, since the core raster
calculator does support GPU acceleration through OpenCL I think that
there are good chances that it will be also fast enough to be usable
in practice.

Have you looked at the other implementations on OTF raster renderers?
There are two I'm aware of: the contour and the hillshade, the latter
uses GPU acceleration as well.

Best of luck!


--
Alessandro Pasotti
QCooperative:  www.qcooperative.net<http://www.qcooperative.net>
ItOpen:   www.itopen.it<http://www.itopen.it>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.osgeo.org/pipermail/qgis-developer/attachments/20210412/ac46e405/attachment.html>