Global Surface Water Occurrence visualisation script

//VERSION=3

//This custom script visualises the water occurrence layer similar to the symbology described in the data user guide with a slightly different color stretch.

//Set up input and output settings
function setup() {
  return {
    input: ["occurrence"],
    output: {
      bands: 3,
      sampleType: "AUTO"
    }
  }
}

//Create color ramp
const ramps = [
  [1, 0xffcccc],  //1% occurrence (Light red)
  [100, 0x0000ff] //100% occurrence (Pure blue)
];

//Create visualizer
const visualizer = new ColorRampVisualizer(ramps);

//EvaluatePixel function
function evaluatePixel(sample) {
  if (sample.occurrence == 0){  //Not water
    return [1, 1, 1]            //Return White
  }else if (sample.occurrence > 100){ //No data
    return [0.8, 0.8, 0.8]            //Return Light gray
  }else if (sample.occurrence > 0 && sample.occurrence <= 100){ //1 - 100% occurrence
    return [visualizer.process(sample.occurrence)[0], visualizer.process(sample.occurrence)[1], visualizer.process(sample.occurrence)[2]];  //Return color ramp values
  }
}