Global Water Bodies Occurrence visualisation script

//VERSION=3

// this script visualizes water bodies occurence derived from Quality layer (QUAL)

// set up input and output settings
function setup() {
  return {
    input: ["QUAL", "dataMask"],
    output: {
      bands: 4,
      sampleType: "AUTO"
    }
  }
}

// create a visualizer
const map = [
  [71, 0xff0000], // Very low occurrence  // red
  [72, 0x8e35ef], // Low occurrence       // Purple
  [73, 0xa6a6e6], // Medium occurrence    // Magenta
  [74, 0x00ffff], // High occurrence      // cyan
  [74, 0x3bb9ff], // Very high occurrence  // deep sky blue
  [76, 0x0032c8]  //Permanent occurrence   //blue
];

const visualizer = new ColorMapVisualizer(map);

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