CLMS HR-S&I: Persistent Snow Area quality layer visualisation script
//VERSION=3
function setup() {
return {
input: ["QC", "dataMask"],
output: { bands: 4, sampleType: "AUTO" },
};
}
const map = [
[0, 0x00a600], //0 - High Quality
[1, 0xa6e64d], //1 - Medium Quality
[2, 0xf2a64d], //2 - Low Quality
[3, 0xff0000], //3 - Minimal Quality
[250, 0xcccccc], //250 - Masked
[255, 0x000000], //255 - NODATA
];
const visualizer = new ColorMapVisualizer(map);
function evaluatePixel(sample) {
let rgbVis = visualizer.process(sample.QC);
return rgbVis.concat(sample.dataMask);
}General description of the script
This script visualises the Persistent Snow Area quality layer.
Table 1: Classification classes and colouring scheme.
| Value | Color | Label |
|---|---|---|
| 1 | 0 - high quality | |
| 2 | 1 - medium quality | |
| 3 | 2 - low quality | |
| 4 | 3 - minimal quality | |
| 5 | 200 - masked | |
| 6 | 255 - no data |
Description of representative images
PSA quality over the Mont Blanc Region, FR
