[GRASS-dev] GSoC introduction Roberta Fagandini

[Moritz Lennert]

Hi Roberta,

On 24/04/18 13:55, Roberta Fagandini wrote:
> 2018-04-24 13:15 GMT+02:00 Moritz Lennert <mlennert at club.worldonline.be 
> <mailto:mlennert at club.worldonline.be>>:
> 
>     Hi Roberta,
> 
> 
> Hi Moritz!
> 
> 
>     On 24/04/18 13:01, Roberta Fagandini wrote:
> 
>         Hi all!
>         I'm Roberta Fagandini, Ph.D. student at Politecnico of Milano.
>         My proposal "GRASS GIS module for Sentinel-2 cloud and shadow
>         detection" has been accepted therefore I've been selected for
>         the GSoC 2018.
>         I'm glad to start contributing to OSGeo and especially to GRASS
>         GIS with the help of my mentors Roberto Marzocchi and Moritz
>         Lennert.
> 
>         My project consists in the realization of a GRASS GIS module for
>         the detection of clouds and their shadows in Sentinel-2 images
>         without using time series.
>         Below you can find the link to my proposal:
> 
>         https://docs.google.com/document/d/1mQyouqbHGHugn5DjEDZI3hc1eU_bT_b0qLJPPwkt_hk/edit?usp=sharing
>         <https://docs.google.com/document/d/1mQyouqbHGHugn5DjEDZI3hc1eU_bT_b0qLJPPwkt_hk/edit?usp=sharing>
> 
>         I would be grateful if you could have a look at the proposal and
>         provide any suggestions.
>         Every feedback is welcome and it will be useful to improve my
>         project.
> 
>         I'm waiting for the writing access to the OSGeo wiki, therefore,
>         I will share my wiky page as soon as possible.
> 
>         Thanks for this great opportunity!
> 
> 
>     It is great to have you with us ! I'm looking forward to working
>     with you on this project.
> 
> 
> First of all I want to thank you for being my mentor!
> 
>     The first thing I would love to see is your existing python script
>     to get a better understanding of the exact approach you are planning
>     on implementing.
> 
> 
>     Depending on what tool you prefer, you can either set up a github
>     repository for the project, or you could also use the sandbox in the
>     GRASS svn [1]. You could then share your code there.
> 
> 
> A the moment I have only some bash script. I'm testing different 
> procedures for shadows detection, which is the task that is creating 
> more troubles at the moment.  Anyway, I already had the intention of 
> setting up a github repository for the project therefore, I hope to 
> share it as soon as possible.
> 


Please also set up a wiki page about your project. See [0] for examples 
from last year.

Looking at your bash scripts, I think the first thing to do during this 
bonding period is, as you planned yourself, to get familiar with the 
writing of GRASS modules in Python. You can have a look at existing 
scripts [1, 2] to get feeling for this works and how to structure addon 
code in order to make it directly installable with g.extension.

You can find the actual function definitions and documentation of the 
GRASS Python scripting library at [3]. The functions in that library 
should be more than enough to translate your scripts into a (or several) 
modules.

Be aware that GRASS modules create their own GUI. So, unless you need 
some interactive features in your modules, you will not have to program 
your own GUI.

Something else you should probably do during this bonding time is to 
elaborate a schema of your algorithm, so that it is easier to understand 
what it does at each step.

Best wishes,
Moritz


[0] https://trac.osgeo.org/grass/wiki/GSoC
[1] https://trac.osgeo.org/grass/browser/grass/trunk/scripts
[2] https://trac.osgeo.org/grass/browser/grass-addons/grass7
[3] https://grass.osgeo.org/grass75/manuals/libpython/script_intro.html