# Combining FeatureCollections

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Author(s): sabrinaszeto
This basic tutorial shows how users can combine two `ee.FeatureCollection`s into a new `ee.FeatureCollection`.

## Create two `ee.FeatureCollection` objects

Let's begin by generating two sets of random points within the boundary of Utah state in the USA. First, define the boundary of Utah as a geometry.

``````var utahGeometry = ee.Geometry.Polygon([
[-114.05, 37],
[-109.05, 37],
[-109.05, 41],
[-111.05, 41],
[-111.05, 42],
[-114.05, 42]
]);
``````

Then, generate two sets of different random points containing 25 points each. We ensure that the points are different by using a different seed, namely 12 and 1, to generate each set.

``````var newFeatures = ee.FeatureCollection.randomPoints(utahGeometry, 25, 12);
var moreNewFeatures = ee.FeatureCollection.randomPoints(utahGeometry, 25, 1);
``````

## Combine the `ee.FeatureCollection` objects

Next, create a new `ee.FeatureCollection` by merging `newFeatures` and `moreNewFeatures`.

``````var combinedFeatureCollection = newFeatures.merge(moreNewFeatures);
``````

## Visualize the Results

Let's add all the `ee.FeatureCollection`s to the map. First, we set the center of the map to the coordinates defined below and set the zoom level to 6.

``````Map.setCenter(-111.445, 39.251, 6);
``````

Now, we add all the layers, specifying the layer labels as text strings (for example, `'New Features'`) and colors to display each layer in. We will also print the results.

``````Map.addLayer(newFeatures, {}, 'New Features');
Map.addLayer(moreNewFeatures, {color: 'red'}, 'More New Features');
• What happens if you change the zoom level in `Map.setCenter` to 3 or to 12?
• Try changing the layer label of `'More New Features'` to `'Red Points'`. Run the script again to see if it worked.