handle "classification" bands

[fitoprincipe]

This is simlar to bits2bands, but in this case handling "classification" bands.

The main idea is to be able to handle a classification band using the same information as provided by GEE in the dataset's description, like the SCL band here. The only work the user needs to do is convert this:

to this:

{
  '2': 'dark',
  '3': 'shadow',
  '7': 'clouds_low',
  '8': 'clouds_mid',
  '9': 'clouds_high',
  '10': 'cirrus'
}

It doesn't need to contain all classes but just the needed ones.

[12rambau]

would it be possible to convert the dictionary of the classes into a ee object and thus change a bit the logic with 2 map ? I still have the hope that one day they will open extensibility of the javascript interface so we can port all these cool stuff to the code editor (that's why I'm forcing myself to always use ee computed object in the parameters)

[fitoprincipe]

Usually, I do this when the parameter can come from the server, for example, as it happens with the param styleProperty in the method ee.FeatureCollection.style. However, I find this confusing, because AFAIK you can use a dict as a property only when you compute it on the fly, but you cannot store a dict as a property when you save it as an GEE asset. If this is true (I tested it and seems to be true), to compute it on the fly you need to have it on the client-side, therefore I don't see the benefit of converting it to a server-side object and process it on the server.

[fitoprincipe]

we could create a function that process/format it from STAC, but it'll still be on the client-side. We can do it on a follow-up PR.

[12rambau]

Let's try to use the jupyter-execute directive to see something here. you will need to use the documentation initialize parameter and display the image with plot I think it would be nice for the user to see what it does in the documentation.

[12rambau]

same here let's make the example real

[12rambau]

let's make this AOI a fixture as you are rusing it in the next one

[12rambau]

eheh, here I am challenging you in the top comment of this PR ;-)

[fitoprincipe]

same answer 😄