Primary competition visual

GEOAI Challenge for Cropland Mapping in Dry Environments

Helping Uzbekistan, Russian Federation
1 000 CHF
Completed (6 months ago)
Classification
Earth Observation
617 joined
184 active
Starti
Jul 02, 25
Closei
Sep 29, 25
Reveali
Sep 29, 25
First Place ( also unofficial )
Platform · 2 Oct 2025, 11:59 · 7

Data Aspects

  • I use Sentinel 2 data of train coordinates both locations ( Fergana , Orengurg ).
  • also Cloud Probability from sentinel 2 used.
  • Timeseries span about 4 years.
  • GEE used collection with CLOUD_COVER_PERCENT 20 ( similar as test data ).

Feature Engineering

Sentinel 2 bands used B2 to B12 ( simiar as test data ).

Added Normalized Difference indexes such as ( ex: BNDVI, MNDVI, NDVI, NDVI705, RENDVI, RNDVI, GNDVI, WI2, WI1, VrNIRBI, VIG, VI700, etc..).

Also Transform 4 year timeseries to aggregated of each month.

that data structure like ( sample_size, months, features )

Model Architecture

Since data structure is 2D, it best to use conv layer, so an Simple stack of convolution with dropout layer

Insight

Discussion 7 answers
User avatar
Freelance

Hi,

Thanks for sharing and it's amazing that one could achieve such a high score using only Sentinel 2 data.

If you don't mind, I'd like to ask what you meant by this:

"....so to counterbalance loss function with label_smoothing 0.1 value."

How did you implement it?

2 Oct 2025, 13:01
Upvotes 0

I using Tensorflow for model construction, so some of loss functions is predefined,

ex:

https://www.tensorflow.org/api_docs/python/tf/keras/losses/BinaryCrossentropy

also label smoothing is one of the technique to help model generalization.

User avatar
Freelance

Oh ok, got it. Thanks

Hello, amazing work winning this competition. By chance do you have a github repo for this competition?

3 Oct 2025, 06:49
Upvotes 0

I don't know it okay with host

User avatar
Koleshjr
Multimedia university of kenya

it is okay. I mean we are always encourgaed to share our solutions with the community!

If possible kindly let us know.