Corrective labeling GEE app

[ivanzvonkov]

Context: It should be easy for partners to look at our cropland maps and generate corrective labels.

Potential solution:
Write GEE app addition that

• Allows users to add points to wrong classifications
• Functionality for converting wrong classification points to ground truth points
• Button for downloading or sending points

[ivanzvonkov]

Additional point: the default satellite imagery should match the year of the map

[MsPixels]

Hello Ivan, I tried something on the app:

https://aasareansah.users.earthengine.app/view/malawicorrective-labeling-app

I'll be on standby for your comments

[ivanzvonkov]

Hey @MsPixels, this is great initial go!

• Could you add instructions to the app so someone with no experience could understand that they need to add points to where the map is incorrect?
• Is it possible to restrict the drawing tool to only allow point drawings?
• Is it possible to have just a single button for downloading the csv instead of two?
• title should have: Corrective not Collective
• Do you think it would be easier or harder to use a double map with one side as cropmap and other side as satellite data? (like here)

[MsPixels]

Thanks, @ivanzvonkov!

• Yes, I'll do that
• I'll look into it and get back to you.
• Well, one downloads the data from Earth engine and the other exports it as a CSV
• Good catch - just changed it to Corrective
• Oh I get your point. I just changed the satellite base map

[ivanzvonkov]

Well, one downloads the data from Earth engine and the other exports it as a CSV

Is it possible to do this in one step?

[MsPixels]

Alright sure, I'll work on that and get back to you.

[MsPixels]

@ivanzvonkov, I updated the App.. However, I wasn't able to merge the download and export button..Any help on this?

Sharing the updated app here: https://aasareansah.users.earthengine.app/view/malawicorrective-appv2
The code is here as well: https://code.earthengine.google.com/a0210e909fcb5da006d67bb175873205

[ivanzvonkov]

@MsPixels Thanks for the updates!

I didn't find a way to make the download automatic but I came up with an alternative scheme to make it more intuitive hopefully: https://code.earthengine.google.com/86d5145a26cc93283fa4fd8bdde6b9fe
Let me know what you think!

Do you think that single instruction sentence would be sufficient to get the Malawi users to use the app correctly? Would we be comfortable emailing this app to them so they can generate points for us? Or would additional instructions be beneficial via alternative format (linked PDF, slides, video)?

[ivanzvonkov]

From before, I don't think this point was addressed, thoughts on this?

Do you think it would be easier or harder to use a double map with one side as cropmap and other side as satellite data? (like here)

[MsPixels]

Thanks @ivanzvonkov, are you available for a call today or tomorrow?

[ivanzvonkov]

Based on call

• Legend
• Link to instructions
• Double point (if possible)

[ivanzvonkov]

@MsPixels What do you think about adding the script that you made to this repository through a Pull Request?

[MsPixels]

@ivanzvonkov, which script are you referring to? The GEE code or the link to the App