NDVI, Analysis Ready Planetscope
//VERSION=3
// ndvi
function setup() {
return {
input: ["nir", "red", "cloud_mask", "dataMask"],
output: {
bands: 4
}
};
}
const colorRamp = [
[0, 0xfffdea], [0.00390625, 0xfefce7], [0.0078125, 0xfefbe5],
[0.01171875, 0xfdfae3], [0.015625, 0xfcf9e0], [0.01953125,0xfbf8de],
[0.0234375, 0xfaf7dc], [0.02734375, 0xfaf6d9], [0.03125, 0xf9f5d7],
[0.03515625, 0xf8f4d5], [0.0390625, 0xf7f3d2], [0.04296875, 0xf6f2d0],
[0.046875, 0xf6f1ce], [0.05078125, 0xf5f0cb], [0.0546875, 0xf4efc9],
[0.05859375, 0xf3eec7], [0.0625, 0xf3edc4], [0.06640625, 0xf2ecc2],
[0.0703125, 0xf1ebbf], [0.07421875, 0xf0eabd], [0.078125, 0xf0e9ba],
[0.08203125, 0xefe8b8], [0.0859375, 0xeee7b6], [0.08984375, 0xeee6b3],
[0.09375, 0xede4b1], [0.09765625, 0xece3ae], [0.1015625, 0xebe2ac],
[0.10546875, 0xebe1a9], [0.109375, 0xeae0a7], [0.11328125, 0xe9dfa4],
[0.1171875, 0xe9dea2], [0.12109375, 0xe8dd9f], [0.125, 0xe7dc9c],
[0.12890625, 0xe6db9a], [0.1328125, 0xe6da97], [0.13671875, 0xe5d995],
[0.140625, 0xe4d892], [0.14453125, 0xe4d78f], [0.1484375, 0xe3d68d],
[0.15234375, 0xe2d58a], [0.15625, 0xe2d487], [0.16015625, 0xe1d384],
[0.1640625, 0xe0d281], [0.16796875, 0xe0d17f], [0.171875, 0xdfd07d],
[0.17578125, 0xdecf7a], [0.1796875, 0xdece77], [0.18359375, 0xddcd74],
[0.1875, 0xdccc71], [0.19140625, 0xdccb6e], [0.1953125, 0xdbca6a],
[0.19921875, 0xdac967], [0.203125, 0xdac864], [0.20703125, 0xd9c660],
[0.2109375, 0xd8c55d], [0.21484375, 0xd8c459], [0.21875, 0xd8c458],
[0.22265625, 0xd6c456], [0.2265625, 0xd5c354], [0.23046875, 0xd3c252],
[0.234375, 0xd2c250], [0.23828125, 0xd0c14e], [0.2421875, 0xcec04c],
[0.24609375, 0xcdc04a], [0.25, 0xccbf48], [0.25390625, 0xcabe46],
[0.2578125, 0xc9be44], [0.26171875, 0xc7bd41], [0.265625, 0xc5bc3f],
[0.26953125, 0xc4bb3d], [0.2734375, 0xc2bb3a], [0.27734375, 0xc0ba38],
[0.28125, 0xbfb935], [0.28515625, 0xbdb932], [0.2890625, 0xbbb82f],
[0.29296875, 0xbab72d], [0.296875, 0xb8b729], [0.30078125, 0xb6b626],
[0.3046875, 0xb5b523], [0.30859375, 0xb3b51f], [0.3125, 0xb1b41b],
[0.31640625, 0xb0b317], [0.3203125, 0xaeb311], [0.32421875, 0xacb20a],
[0.328125, 0xaab103], [0.33203125, 0xa9b100], [0.3359375, 0xa7b000],
[0.33984375, 0xa5af00], [0.34375, 0xa3af00], [0.34765625, 0xa2ae00],
[0.3515625, 0xa0ad00], [0.35546875, 0x9ead00], [0.359375, 0x9cac00],
[0.36328125, 0x9bac00], [0.3671875, 0x99ab00], [0.37109375, 0x97aa00],
[0.375, 0x95a900], [0.37890625, 0x93a900], [0.3828125, 0x92a800],
[0.38671875, 0x90a700], [0.390625, 0x8ea700], [0.39453125, 0x8ca600],
[0.3984375, 0x8aa500], [0.40234375, 0x89a400], [0.40625, 0x87a400],
[0.41015625, 0x85a300], [0.4140625, 0x83a200], [0.41796875, 0x82a200],
[0.421875, 0x80a100], [0.42578125, 0x7ea000], [0.4296875, 0x7c9f00],
[0.43359375, 0x7a9f00], [0.4375, 0x799e00], [0.44140625, 0x779d00],
[0.4453125, 0x759c00], [0.44921875, 0x739c00], [0.453125, 0x729b00],
[0.45703125, 0x709a00], [0.4609375, 0x6e9900], [0.46484375,0x6c9900],
[0.46875, 0x6a9800], [0.47265625, 0x699700], [0.4765625, 0x679600],
[0.48046875, 0x659600], [0.484375, 0x639500], [0.48828125, 0x619400],
[0.4921875, 0x609300], [0.49609375, 0x5e9300], [0.5, 0x5c9300],
[0.50390625, 0x5a9200], [0.5078125, 0x589100], [0.51171875, 0x579000],
[0.515625, 0x558f00], [0.51953125, 0x538f01], [0.5234375, 0x518e03],
[0.52734375, 0x4f8d05], [0.53125, 0x4d8c07], [0.53515625, 0x4b8c09],
[0.5390625, 0x498b0b], [0.54296875, 0x478a0d], [0.546875, 0x45890f],
[0.55078125, 0x438810], [0.5546875, 0x418812], [0.55859375, 0x3f8713],
[0.5625, 0x3d8614], [0.56640625, 0x3b8516], [0.5703125, 0x398517],
[0.57421875, 0x378418], [0.578125, 0x358319], [0.58203125, 0x33821a],
[0.5859375, 0x31811b], [0.58984375, 0x2e811c], [0.59375, 0x2c801d],
[0.59765625, 0x2a7f1d], [0.6015625, 0x277e1e], [0.60546875, 0x257d1f],
[0.609375, 0x227d20], [0.61328125, 0x1f7c20], [0.6171875, 0x1c7b21],
[0.62109375, 0x197a22], [0.625, 0x157922], [0.62890625, 0x117923],
[0.6328125, 0x0c7824], [0.63671875, 0x067724], [0.640625, 0x027625],
[0.64453125, 0x007525], [0.6484375, 0x007526], [0.65234375, 0x007426],
[0.65625, 0x007327], [0.66015625, 0x007227], [0.6640625, 0x007128],
[0.66796875, 0x007028], [0.671875, 0x007029], [0.67578125, 0x006f29],
[0.6796875, 0x006e29], [0.68359375, 0x006d2a], [0.6875, 0x006c2a],
[0.69140625, 0x006c2a], [0.6953125, 0x006b2b], [0.69921875, 0x006a2b],
[0.703125, 0x00692b], [0.70703125, 0x00682c], [0.7109375, 0x00672c],
[0.71484375, 0x00672c], [0.71875, 0x00662c], [0.72265625, 0x00652d],
[0.7265625, 0x00642d], [0.73046875, 0x00632d], [0.734375, 0x00622d],
[0.73828125, 0x00622d], [0.7421875, 0x00612e], [0.74609375, 0x00602e],
[0.75, 0x005f2e], [0.75390625, 0x005e2e], [0.7578125, 0x005d2e],
[0.76171875, 0x005d2e], [0.765625, 0x005c2e], [0.76953125, 0x005b2e],
[0.7734375, 0x005a2e], [0.77734375, 0x00592f], [0.78125, 0x00582f],
[0.78515625, 0x00582f], [0.7890625, 0x00572f], [0.79296875, 0x00562f],
[0.796875, 0x00552f], [0.80078125, 0x00542f], [0.8046875, 0x00532f],
[0.80859375, 0x00532f], [0.8125, 0x00522f], [0.81640625, 0x00512f],
[0.8203125, 0x00502f], [0.82421875, 0x004f2f], [0.828125, 0x004e2e],
[0.83203125, 0x004d2e], [0.8359375, 0x004d2e], [0.83984375, 0x004c2e],
[0.84375, 0x004b2e], [0.84765625, 0x004a2e], [0.8515625, 0x00492e],
[0.85546875, 0x00482e], [0.859375, 0x00472e], [0.86328125, 0x00472e],
[0.8671875, 0x00462d], [0.87109375, 0x00452d], [0.875, 0x00442d],
[0.87890625, 0x00432d], [0.8828125, 0x00422d], [0.88671875, 0x00412c],
[0.890625, 0x00412c], [0.89453125, 0x00402c], [0.8984375, 0x003f2c],
[0.90234375, 0x003e2c], [0.90625, 0x003d2b], [0.91015625, 0x003c2b],
[0.9140625, 0x003b2b], [0.91796875, 0x003a2b], [0.921875, 0x003a2a],
[0.92578125, 0x00392a], [0.9296875, 0x00382a], [0.93359375, 0x003729],
[0.9375, 0x003629], [0.94140625, 0x003529], [0.9453125, 0x003428],
[0.94921875, 0x003328], [0.953125, 0x003228], [0.95703125, 0x003127],
[0.9609375, 0x003027], [0.96484375, 0x002f26], [0.96875, 0x002e26],
[0.97265625, 0x002d25], [0.9765625, 0x002c25], [0.98046875, 0x002b24],
[0.984375, 0x002a24], [0.98828125, 0x002923], [0.9921875,0x002823],
[0.99609375, 0x002622], [1, 0x072421]];
let viz = new ColorRampVisualizer(colorRamp);
function evaluatePixel(sample) {
let ndvi = (sample.nir - sample.red) / (sample.nir + sample.red);
const minIndex = 0;
const maxIndex = 1;
let visVal = null;
if (ndvi > maxIndex || ndvi < minIndex) {
visVal = [0, 0, 0, 0];
}
else {
visVal = [...viz.process(ndvi), sample.dataMask];
}
return visVal
}//VERSION=3
// ndvi
function setup() {
return {
input: ["nir", "red", "cloud_mask", "dataMask"],
output: [
{ id: "default", bands: 4 },
{ id: "index", bands: 1, sampleType: "FLOAT32" },
{ id: "eobrowserStats", bands: 2, sampleType: "FLOAT32" },
{ id: "dataMask", bands: 1 },
]
};
}
const colorRamp = [
[0, 0xfffdea], [0.00390625, 0xfefce7], [0.0078125, 0xfefbe5],
[0.01171875, 0xfdfae3], [0.015625, 0xfcf9e0], [0.01953125,0xfbf8de],
[0.0234375, 0xfaf7dc], [0.02734375, 0xfaf6d9], [0.03125, 0xf9f5d7],
[0.03515625, 0xf8f4d5], [0.0390625, 0xf7f3d2], [0.04296875, 0xf6f2d0],
[0.046875, 0xf6f1ce], [0.05078125, 0xf5f0cb], [0.0546875, 0xf4efc9],
[0.05859375, 0xf3eec7], [0.0625, 0xf3edc4], [0.06640625, 0xf2ecc2],
[0.0703125, 0xf1ebbf], [0.07421875, 0xf0eabd], [0.078125, 0xf0e9ba],
[0.08203125, 0xefe8b8], [0.0859375, 0xeee7b6], [0.08984375, 0xeee6b3],
[0.09375, 0xede4b1], [0.09765625, 0xece3ae], [0.1015625, 0xebe2ac],
[0.10546875, 0xebe1a9], [0.109375, 0xeae0a7], [0.11328125, 0xe9dfa4],
[0.1171875, 0xe9dea2], [0.12109375, 0xe8dd9f], [0.125, 0xe7dc9c],
[0.12890625, 0xe6db9a], [0.1328125, 0xe6da97], [0.13671875, 0xe5d995],
[0.140625, 0xe4d892], [0.14453125, 0xe4d78f], [0.1484375, 0xe3d68d],
[0.15234375, 0xe2d58a], [0.15625, 0xe2d487], [0.16015625, 0xe1d384],
[0.1640625, 0xe0d281], [0.16796875, 0xe0d17f], [0.171875, 0xdfd07d],
[0.17578125, 0xdecf7a], [0.1796875, 0xdece77], [0.18359375, 0xddcd74],
[0.1875, 0xdccc71], [0.19140625, 0xdccb6e], [0.1953125, 0xdbca6a],
[0.19921875, 0xdac967], [0.203125, 0xdac864], [0.20703125, 0xd9c660],
[0.2109375, 0xd8c55d], [0.21484375, 0xd8c459], [0.21875, 0xd8c458],
[0.22265625, 0xd6c456], [0.2265625, 0xd5c354], [0.23046875, 0xd3c252],
[0.234375, 0xd2c250], [0.23828125, 0xd0c14e], [0.2421875, 0xcec04c],
[0.24609375, 0xcdc04a], [0.25, 0xccbf48], [0.25390625, 0xcabe46],
[0.2578125, 0xc9be44], [0.26171875, 0xc7bd41], [0.265625, 0xc5bc3f],
[0.26953125, 0xc4bb3d], [0.2734375, 0xc2bb3a], [0.27734375, 0xc0ba38],
[0.28125, 0xbfb935], [0.28515625, 0xbdb932], [0.2890625, 0xbbb82f],
[0.29296875, 0xbab72d], [0.296875, 0xb8b729], [0.30078125, 0xb6b626],
[0.3046875, 0xb5b523], [0.30859375, 0xb3b51f], [0.3125, 0xb1b41b],
[0.31640625, 0xb0b317], [0.3203125, 0xaeb311], [0.32421875, 0xacb20a],
[0.328125, 0xaab103], [0.33203125, 0xa9b100], [0.3359375, 0xa7b000],
[0.33984375, 0xa5af00], [0.34375, 0xa3af00], [0.34765625, 0xa2ae00],
[0.3515625, 0xa0ad00], [0.35546875, 0x9ead00], [0.359375, 0x9cac00],
[0.36328125, 0x9bac00], [0.3671875, 0x99ab00], [0.37109375, 0x97aa00],
[0.375, 0x95a900], [0.37890625, 0x93a900], [0.3828125, 0x92a800],
[0.38671875, 0x90a700], [0.390625, 0x8ea700], [0.39453125, 0x8ca600],
[0.3984375, 0x8aa500], [0.40234375, 0x89a400], [0.40625, 0x87a400],
[0.41015625, 0x85a300], [0.4140625, 0x83a200], [0.41796875, 0x82a200],
[0.421875, 0x80a100], [0.42578125, 0x7ea000], [0.4296875, 0x7c9f00],
[0.43359375, 0x7a9f00], [0.4375, 0x799e00], [0.44140625, 0x779d00],
[0.4453125, 0x759c00], [0.44921875, 0x739c00], [0.453125, 0x729b00],
[0.45703125, 0x709a00], [0.4609375, 0x6e9900], [0.46484375,0x6c9900],
[0.46875, 0x6a9800], [0.47265625, 0x699700], [0.4765625, 0x679600],
[0.48046875, 0x659600], [0.484375, 0x639500], [0.48828125, 0x619400],
[0.4921875, 0x609300], [0.49609375, 0x5e9300], [0.5, 0x5c9300],
[0.50390625, 0x5a9200], [0.5078125, 0x589100], [0.51171875, 0x579000],
[0.515625, 0x558f00], [0.51953125, 0x538f01], [0.5234375, 0x518e03],
[0.52734375, 0x4f8d05], [0.53125, 0x4d8c07], [0.53515625, 0x4b8c09],
[0.5390625, 0x498b0b], [0.54296875, 0x478a0d], [0.546875, 0x45890f],
[0.55078125, 0x438810], [0.5546875, 0x418812], [0.55859375, 0x3f8713],
[0.5625, 0x3d8614], [0.56640625, 0x3b8516], [0.5703125, 0x398517],
[0.57421875, 0x378418], [0.578125, 0x358319], [0.58203125, 0x33821a],
[0.5859375, 0x31811b], [0.58984375, 0x2e811c], [0.59375, 0x2c801d],
[0.59765625, 0x2a7f1d], [0.6015625, 0x277e1e], [0.60546875, 0x257d1f],
[0.609375, 0x227d20], [0.61328125, 0x1f7c20], [0.6171875, 0x1c7b21],
[0.62109375, 0x197a22], [0.625, 0x157922], [0.62890625, 0x117923],
[0.6328125, 0x0c7824], [0.63671875, 0x067724], [0.640625, 0x027625],
[0.64453125, 0x007525], [0.6484375, 0x007526], [0.65234375, 0x007426],
[0.65625, 0x007327], [0.66015625, 0x007227], [0.6640625, 0x007128],
[0.66796875, 0x007028], [0.671875, 0x007029], [0.67578125, 0x006f29],
[0.6796875, 0x006e29], [0.68359375, 0x006d2a], [0.6875, 0x006c2a],
[0.69140625, 0x006c2a], [0.6953125, 0x006b2b], [0.69921875, 0x006a2b],
[0.703125, 0x00692b], [0.70703125, 0x00682c], [0.7109375, 0x00672c],
[0.71484375, 0x00672c], [0.71875, 0x00662c], [0.72265625, 0x00652d],
[0.7265625, 0x00642d], [0.73046875, 0x00632d], [0.734375, 0x00622d],
[0.73828125, 0x00622d], [0.7421875, 0x00612e], [0.74609375, 0x00602e],
[0.75, 0x005f2e], [0.75390625, 0x005e2e], [0.7578125, 0x005d2e],
[0.76171875, 0x005d2e], [0.765625, 0x005c2e], [0.76953125, 0x005b2e],
[0.7734375, 0x005a2e], [0.77734375, 0x00592f], [0.78125, 0x00582f],
[0.78515625, 0x00582f], [0.7890625, 0x00572f], [0.79296875, 0x00562f],
[0.796875, 0x00552f], [0.80078125, 0x00542f], [0.8046875, 0x00532f],
[0.80859375, 0x00532f], [0.8125, 0x00522f], [0.81640625, 0x00512f],
[0.8203125, 0x00502f], [0.82421875, 0x004f2f], [0.828125, 0x004e2e],
[0.83203125, 0x004d2e], [0.8359375, 0x004d2e], [0.83984375, 0x004c2e],
[0.84375, 0x004b2e], [0.84765625, 0x004a2e], [0.8515625, 0x00492e],
[0.85546875, 0x00482e], [0.859375, 0x00472e], [0.86328125, 0x00472e],
[0.8671875, 0x00462d], [0.87109375, 0x00452d], [0.875, 0x00442d],
[0.87890625, 0x00432d], [0.8828125, 0x00422d], [0.88671875, 0x00412c],
[0.890625, 0x00412c], [0.89453125, 0x00402c], [0.8984375, 0x003f2c],
[0.90234375, 0x003e2c], [0.90625, 0x003d2b], [0.91015625, 0x003c2b],
[0.9140625, 0x003b2b], [0.91796875, 0x003a2b], [0.921875, 0x003a2a],
[0.92578125, 0x00392a], [0.9296875, 0x00382a], [0.93359375, 0x003729],
[0.9375, 0x003629], [0.94140625, 0x003529], [0.9453125, 0x003428],
[0.94921875, 0x003328], [0.953125, 0x003228], [0.95703125, 0x003127],
[0.9609375, 0x003027], [0.96484375, 0x002f26], [0.96875, 0x002e26],
[0.97265625, 0x002d25], [0.9765625, 0x002c25], [0.98046875, 0x002b24],
[0.984375, 0x002a24], [0.98828125, 0x002923], [0.9921875,0x002823],
[0.99609375, 0x002622], [1, 0x072421]];
let viz = new ColorRampVisualizer(colorRamp);
function evaluatePixel(sample) {
let ndvi = (sample.nir - sample.red) / (sample.nir + sample.red);
const minIndex = 0;
const maxIndex = 1;
let visVal = null;
if (ndvi > maxIndex || ndvi < minIndex) {
visVal = [0, 0, 0, 0];
}
else {
visVal = [...viz.process(ndvi), sample.dataMask];
}
const indexVal = sample.dataMask === 1 ? ndvi : NaN;
// see those layers for context
// - True Color, Cloud Masked
// - Cloud Classification
// cloud_mask = 1 => no clouds
// cloud_mask = 2,3,4,5,6,7 => different classes of clouds (bright cloud, haze, ...)
// cloud_mask = -999 => no data
let cloudBool = sample.cloud_mask == 1 ? 1 : 0;
return {
default: visVal,
index: [indexVal],
eobrowserStats: [ndvi, cloudBool],
dataMask: [sample.dataMask],
};
}//VERSION=3
// ndvi
function setup() {
return {
input: ["nir", "red", "cloud_mask", "dataMask"],
output: {
bands: 4
}
};
}
function evaluatePixel(sample) {
return [(sample.nir - sample.red) / (sample.nir + sample.red)];
}General description
The well known and widely used NDVI is a simple, but effective index for quantifying green vegetation. It normalizes green leaf scattering in Near Infra-red wavelengths with chlorophyll absorption in red wavelengths. The value range of the NDVI is -1 to 1. Negative values of NDVI (values approaching -1) correspond to water. Values close to zero (-0.1 to 0.1) generally correspond to barren areas of rock, sand, or snow. Low, positive values represent shrub and grassland (approximately 0.2 to 0.4), while high values indicate temperate and tropical rainforests (values approaching 1).
Description of representative image
A visualization of NDVI for Des Moines, United States (April 2023)
