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cordmaur authored Nov 13, 2020
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## Synopsis

WaterDetect is an end-to-end algorithm to generate open water cover mask, specially conceived for L2A Sentinel 2 imagery from [MAJA](https://logiciels.cnes.fr/en/content/maja) processor. It can also be used for Landsat 8 images and for other clustering tasks, as it returns as results, besides the water masks, the clustering. <br>
WaterDetect is an end-to-end algorithm to generate open water cover mask, specially conceived for L2A Sentinel 2 imagery from [MAJA](https://logiciels.cnes.fr/en/content/maja) processor. It can also be used for Landsat 8 images and for other multispectral clustering/segmentation tasks.<br>

The water masks produced by WaterDetect are being used in water qualty products (Obs2Co) and multi-temporal water maps (Surfwater). Both chains are supported by the "SWOT-Downstream" program by CNES. Products are provided by the THEIA / Hydroweb-NG platform.

The WaterDetect algorithm uses a multidimensional agglomerative clustering technique on a subsample of the scene's pixels, to group them in classes, and a naive bayes classifier to generalize the results for the whole scene, as summarized in the following picture:

All the details and tests has been described in the article <b>Automatic Water Detection from Multidimensional Hierarchical Clustering for Sentinel-2 Images and a Comparison with Level 2A Processors<b>, under revision by the journal Remote Sensing of Environment.
![Screenshot](GraphicalAbstract.JPG)

All the details and tests has been described in the article <b>Automatic Water Detection from Multidimensional Hierarchical Clustering for Sentinel-2 Images and a Comparison with Level 2A Processors</b>, under revision by the journal Remote Sensing of Environment.

How to cide:
Cordeiro, M.C.R, Martinez, J.-M., Pena Luque, S., 2020. Automatic Water Detection from Multidimensional Hierarchical Clustering for Sentinel-2 Images and a Comparison with Level 2A Processors. Remote Sensing of Environment XX, XX.

## Contributors
> Author: Maurício Cordeiro (ANA/GET)<br>
> Supervisor: Jean-Michel Martinez (IRD/GET)<br>
> Validation dataset: Santiago Pena Luque (CNES)


## Dependencies
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## Config File

## Contributors
> Author: Maurício Cordeiro (ANA/GET)<br>
> Supervisor: Jean-Michel Martinez (IRD/GET)<br>
> Validation dataset: Santiago Pena Luque (CNES)
## License
This code is licensed under the [GNU General Public License v3.0](https://github.com/cordmaur/WaterDetect/blob/master/LICENSE) license. Please, refer to GNU's webpage (https://www.gnu.org/licenses/gpl-3.0.en.html) for details.

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