[GRASS-dev] ​GSoC 2018 report week 01 - GRASS GIS module for Sentinel-2 cloud and shadow detection

[Roberta Fagandini]

Hi all!
I have just added a new version of the grass python script to my GitHub
repository [0].
I tried to clean up the code.
As always, any feedback is welcome!

Thanks in advance!

Roberta

[0] https://github.com/RobiFag/GRASS_clouds_and_shadows

2018-05-21 15:19 GMT+02:00 Roberta Fagandini <robifagandini at gmail.com>:

> Ciao Stefan!
>
> 2018-05-20 21:44 GMT+02:00 Stefan Blumentrath <Stefan.Blumentrath at nina.no>
> :
>
>> Ciao Roberta,
>>
>> Thanks for the comprehensive report!
>>
>> One general hint: Even if the drawback is complex expression(s) I would
>> suggest merging r.mapcalc calls. That can improve performance quite a bit
>> (less data read and written) and reduces the need to manage temporary data.
>>
>> See also: https://grass.osgeo.org/
>> <https://grass.osgeo.org/grass74/manuals/r.mapcalc.html#multiple-computations>
>> grass74
>> <https://grass.osgeo.org/grass74/manuals/r.mapcalc.html#multiple-computations>
>> /manuals/r.mapcalc.html#multiple-computations
>> <https://grass.osgeo.org/grass74/manuals/r.mapcalc.html#multiple-computations>
>>
>> If you don't need the first_... To fifth_... files later, I would even
>> say everything in 3rd_procedure.py until r.to.vect could be solved in a
>> single mapcalc operation...
>>
>
> Thank you so much for your hints! I'm trying to clean up the code without
> creating a too complex expression..I hope to share the new version by this
> evening or tomorrow at the latest.
>
>
>>
>> Kind regards and again thank for your GSoC work,
>> Stefan
>>
>>
> Thanks again!!
> Roberta
>
>
>>
>> ------------------------------
>> *From:* grass-dev <grass-dev-bounces at lists.osgeo.org> on behalf of
>> Roberta Fagandini <robifagandini at gmail.com>
>> *Sent:* Sunday, May 20, 2018 4:33:57 PM
>> *To:* soc at lists.osgeo.org; GRASS developers list
>> *Subject:* [GRASS-dev] ​GSoC 2018 report week 01 - GRASS GIS module for
>> Sentinel-2 cloud and shadow detection
>>
>> Hi all!
>> I'm Roberta Fagandini and I'm working on my GSoC project, a GRASS GIS
>> module for Sentinel-2 cloud and shadow detection.
>> This is my report for the first week of coding.
>> Since my progress has been a bit faster than expected I have already
>> discussed with my mentors about further additions to the project. Therefore
>> I have already updated my wiki page [0] changing the timeline. In this way,
>> I will be able to release a more complete module.
>>
>> *1) What did I complete this week?*
>>
>>    - Checked the prototype version of the algorithm for cloud and shadow
>>    detection
>>    - Tested it
>>    - I better studied the documentation of the GRASS Python Scripting
>>    Library and started coding the GRASS python script following the
>>    workflow schema prepared during the bonding period [1]
>>    - Coded the 'data preparation' phase
>>    - Coded the clouds detection procedure
>>    - Added this first part of python script to my GitHub repository [2]
>>    - Discussed with my mentors about further additions
>>    - Discussed with the community about testing phase. I received some
>>    feedback and some developers stepped forward to help me in testing the
>>    algorithm
>>    - Shared progress with the community
>>
>> Unfortunately, I wasn't able to code on Thursday because of a PhD meeting
>> with my supervisor.
>>
>> *2) What am I going to achieve for next week?*
>>
>>    - Finish the translation of the algorithm in a basic python script
>>    adding the shadows detection procedure and the steps for checking and
>>    cleaning the final outputs (see [1] for details)
>>    - Improve the python script so as to have a "light" working python
>>    script (manage temporary file, clean up the code, etc.)
>>    - Test it and fix bugs
>>    - Start implementing the GUI
>>
>> *3) Is there any blocking issue?*
>> No at the moment.
>>
>> Best wishes,
>> Roberta
>>
>> [0] https://trac.osgeo.org/grass/wiki/GSoC/2018/CloudsAndShadowsDetection
>> [1] https://drive.google.com/file/d/1KYEKvNBurBFHw1xUTLjM0PW
>> 80Z-7br81/view?usp=sharing
>> [2] https://github.com/RobiFag/GRASS_clouds_and_shadows
>>
>
>
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