How to use @google/earthengine - 10 common examples
To help you get started, we’ve selected a few @google/earthengine examples, based on popular ways it is used in public projects.
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google / earthengine-api / demos / cloud-functions / function.js View on Github 
exports.hexPopHttp = function hexPopHttp(req, res) {
// Enable CORS, allowing client in Cloud Storage to see response data.
res.set('Access-Control-Allow-Origin', '*');
res.set('Access-Control-Allow-Methods', 'GET');
// Get viewport bounds from client request.
const bounds = [
Number(req.query.minLng), Number(req.query.minLat),
Number(req.query.maxLng), Number(req.query.maxLat)
];
ee.data.authenticateViaPrivateKey(PRIVATE_KEY, () => {
ee.initialize(null, null, () => {
// Load an image estimating number of persons per 30 arc-second grid cell.
const image = ee.Image('CIESIN/GPWv4/population-count/2015');
// Create a hexgrid covering the viewport, with TurfJS.
const cellDiameter =
200 * Math.abs(bounds[3] - bounds[1]) / DEGREES_LATITUDE_TO_MILES;
const gridGeoJson = hexGrid(bounds, cellDiameter, 'miles');
const gridFeatures = ee.FeatureCollection(gridGeoJson.features);
// Compute sum of population values for each hex cell.
const reducedFeatures =
image.reduceRegions(gridFeatures, ee.call('Reducer.sum'));
reducedFeatures.evaluate((geojson) => res.send(geojson));
});
});ee.data.authenticateViaPrivateKey(PRIVATE_KEY, () => {
ee.initialize(null, null, () => {
// Load an image estimating number of persons per 30 arc-second grid cell.
const image = ee.Image('CIESIN/GPWv4/population-count/2015');
// Create a hexgrid covering the viewport, with TurfJS.
const cellDiameter =
200 * Math.abs(bounds[3] - bounds[1]) / DEGREES_LATITUDE_TO_MILES;
const gridGeoJson = hexGrid(bounds, cellDiameter, 'miles');
const gridFeatures = ee.FeatureCollection(gridGeoJson.features);
// Compute sum of population values for each hex cell.
const reducedFeatures =
image.reduceRegions(gridFeatures, ee.call('Reducer.sum'));
reducedFeatures.evaluate((geojson) => res.send(geojson));
});
});
};ee.initialize(null, null, () => {
// Load an image estimating number of persons per 30 arc-second grid cell.
const image = ee.Image('CIESIN/GPWv4/population-count/2015');
// Create a hexgrid covering the viewport, with TurfJS.
const cellDiameter =
200 * Math.abs(bounds[3] - bounds[1]) / DEGREES_LATITUDE_TO_MILES;
const gridGeoJson = hexGrid(bounds, cellDiameter, 'miles');
const gridFeatures = ee.FeatureCollection(gridGeoJson.features);
// Compute sum of population values for each hex cell.
const reducedFeatures =
image.reduceRegions(gridFeatures, ee.call('Reducer.sum'));
reducedFeatures.evaluate((geojson) => res.send(geojson));
});
});ee.initialize(null, null, () => {
// Load an image estimating number of persons per 30 arc-second grid cell.
const image = ee.Image('CIESIN/GPWv4/population-count/2015');
// Create a hexgrid covering the viewport, with TurfJS.
const cellDiameter =
200 * Math.abs(bounds[3] - bounds[1]) / DEGREES_LATITUDE_TO_MILES;
const gridGeoJson = hexGrid(bounds, cellDiameter, 'miles');
const gridFeatures = ee.FeatureCollection(gridGeoJson.features);
// Compute sum of population values for each hex cell.
const reducedFeatures =
image.reduceRegions(gridFeatures, ee.call('Reducer.sum'));
reducedFeatures.evaluate((geojson) => res.send(geojson));
});
});ee.initialize(null, null, () => {
// Load an image estimating number of persons per 30 arc-second grid cell.
const image = ee.Image('CIESIN/GPWv4/population-count/2015');
// Create a hexgrid covering the viewport, with TurfJS.
const cellDiameter =
200 * Math.abs(bounds[3] - bounds[1]) / DEGREES_LATITUDE_TO_MILES;
const gridGeoJson = hexGrid(bounds, cellDiameter, 'miles');
const gridFeatures = ee.FeatureCollection(gridGeoJson.features);
// Compute sum of population values for each hex cell.
const reducedFeatures =
image.reduceRegions(gridFeatures, ee.call('Reducer.sum'));
reducedFeatures.evaluate((geojson) => res.send(geojson));
});
});client.refreshAccessToken(function (err, tokens) {
ee.data.authToken_ = 'Bearer ' + tokens['access_token'];
ee.data.authClientId_ = o.cliet_id;
ee.data.authScopes_ = [ee.data.AUTH_SCOPE_];
ee.data.DEFAULT_API_BASE_URL_ = "https://earthengine.googleapis.com/api";
ee.initialize(ee.data.DEFAULT_API_BASE_URL_);
onsuccess();
process.exit();
});
}client.refreshAccessToken(function (err, tokens) {
ee.data.authToken_ = 'Bearer ' + tokens['access_token'];
ee.data.authClientId_ = o.cliet_id;
ee.data.authScopes_ = [ee.data.AUTH_SCOPE_];
ee.data.DEFAULT_API_BASE_URL_ = "https://earthengine.googleapis.com/api";
ee.initialize(ee.data.DEFAULT_API_BASE_URL_);
onsuccess();
process.exit();
});
}client.refreshAccessToken(function (err, tokens) {
ee.data.authToken_ = 'Bearer ' + tokens['access_token'];
ee.data.authClientId_ = o.cliet_id;
ee.data.authScopes_ = [ee.data.AUTH_SCOPE_];
ee.data.DEFAULT_API_BASE_URL_ = "https://earthengine.googleapis.com/api";
ee.initialize(ee.data.DEFAULT_API_BASE_URL_);
onsuccess();
process.exit();
});
}client.refreshAccessToken(function (err, tokens) {
ee.data.authToken_ = 'Bearer ' + tokens['access_token'];
ee.data.authClientId_ = o.cliet_id;
ee.data.authScopes_ = [ee.data.AUTH_SCOPE_];
ee.data.DEFAULT_API_BASE_URL_ = "https://earthengine.googleapis.com/api";
ee.initialize(ee.data.DEFAULT_API_BASE_URL_);
onsuccess();
process.exit();
});
}client.refreshAccessToken(function (err, tokens) {
ee.data.authToken_ = 'Bearer ' + tokens['access_token'];
ee.data.authClientId_ = o.cliet_id;
ee.data.authScopes_ = [ee.data.AUTH_SCOPE_];
ee.data.DEFAULT_API_BASE_URL_ = "https://earthengine.googleapis.com/api";
ee.initialize(ee.data.DEFAULT_API_BASE_URL_);
onsuccess();
process.exit();
});
}@google/earthengine
JavaScript client for Google Earth Engine API.
