CLMS HR-S&I: Sentinel-1 and Sentinel-2 River and Lake Ice Extent visualisation script 

//VERSION=3
function setup() {
    return {
        input: ["RLIE", "dataMask"],
        output: {
            bands: 4,
            sampleType: "Auto"
        }
    };

}

const map = [
    [1, 0x0000FE],  //1 - Open water
    [100, 0x00E8FF],  //100 - Snow-covered or snow-free ice
    [254, 0xFF0000],  //254 - Other features
    [205, 0x7B7B7B],  //205 - Cloud or cloud shadows
    [255, 0xFFFFFF]  //255 - No data
];

const visualizer = new ColorMapVisualizer(map);

function evaluatePixel(sample) {
    let rgbVis = visualizer.process(sample.RLIE);
    return rgbVis.concat(sample.dataMask);
}

General description of the script

This script visualises the River and Lake Ice Extent generated as a combination of RLIE S1 and RLIE S2 products acquired on the same date for the entire EEA38+UK zone.

Table 1: Classification classes and colouring scheme.

Value Color Label
1 open water
100 snow-covered or snow-free ice
254 other features
205 cloud or cloud shadows
255 no data

Description of representative images

09th June 2021, Amsterdam, NL

RLIES1S2

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