What is a feature in Google Earth Engine?

A Feature in Earth Engine is defined as a GeoJSON Feature. Specifically, a Feature is an object with a geometry property storing a Geometry object (or null) and a properties property storing a dictionary of other properties.

What is EE ImageCollection?

The constructor ee.ImageCollection() or the convenience method ee.ImageCollection.fromImages() create image collections from lists of images. You can also create new image collections by merging existing collections. For example: Code Editor (JavaScript) // Create arbitrary constant images.

Is Google Earth Engine a software?

Welcome to Google Earth Engine Google Earth Engine is a geospatial processing service. With Earth Engine, you can perform geospatial processing at scale, powered by Google Cloud Platform. Provide an interactive platform for geospatial algorithm development at scale. Enable high-impact, data-driven science.

How to create image collections in Earth Engine?

In addition to loading an ImageCollection using an Earth Engine collection ID, Earth Engine has methods to create image collections. The constructor ee.ImageCollection() or the convenience method ee.ImageCollection.fromImages() create image collections from lists of images. You can also create new image collections by merging existing collections.

How are feature collections used in Google Earth?

Groups of related features can be combined into a FeatureCollection, to enable additional operations on the entire set such as filtering, sorting and rendering. Besides just simple features (geometry + properties), feature collections can also contain other collections.

How to paint a feature in Google Earth?

// Create an empty image into which to paint the features, cast to byte. // Paint all the polygon edges with the same number and width, display. Note that the empty image into which you paint the features needs to be cast prior to painting.

How to color the edges of a feature?

To color the feature edges with values set from a property of the features, set the color parameter to the name of the property with numeric values: // Paint the edges with different colors, display. Both the color and width with which the boundaries are drawn can be set with properties. For example:

Specifically, a Feature is an object with a geometry property storing a Geometry object (or null) and a properties property storing a dictionary of other properties. To create a Feature, provide the constructor with a Geometry and (optionally) a dictionary of other properties.

How to combine two featurecollections in Google Earth Engine?

Tutorials contributed by the Earth Engine developer community are not part of the official Earth Engine product documentation. This basic tutorial shows how users can combine two ee.FeatureCollection s into a new ee.FeatureCollection. Let’s begin by generating two sets of random points within the boundary of Utah state in the USA.

How to add more features to Google Developers?

Try changing the layer label of ‘More New Features’ to ‘Red Points’. Run the script again to see if it worked. Except as otherwise noted, the content of this page is licensed under the Creative Commons Attribution 4.0 License, and code samples are licensed under the Apache 2.0 License. For details, see the Google Developers Site Policies.

Is there a way to add properties to a feature in the Gee?

Is there a way to add a property to a feature in the GEE. I know that you can edit existing properties with set (), but haven’t found a way to add a property. Thanks for contributing an answer to Geographic Information Systems Stack Exchange! Please be sure to answer the question.

What causes an error in Google Earth Engine?

The following error may be thrown as a result of not repeating the reducer: Collection.reduceColumns: Need 1 inputs for , got 2. Except as otherwise noted, the content of this page is licensed under the Creative Commons Attribution 4.0 License, and code samples are licensed under the Apache 2.0 License.

What are the properties of a feature object?

What are geometric operations in Google Earth Engine?

Geometric Operations Earth Engine supports a wide variety of operations on Geometry objects. These include operations on individual geometries such as computing a buffer, centroid, bounding box, perimeter, convex hull, etc.

How to display two circular geometries in Google Earth?

// Create two circular geometries. // Display polygon 1 in red and polygon 2 in blue. // Compute the intersection, display it in green. // Compute the union, display it in magenta. // Compute the difference, display in yellow. // Compute symmetric difference, display in black.

What does maxerror mean in Google Earth Engine?

The maxError is the maximum allowable error, in meters, from transformations (such as projection or reprojection) that may alter the geometry. If one of the geometries is in a different projection from the other, Earth Engine will do the computation in a spherical coordinate system, with a projection precision given by maxError.

How to reduce the properties of a featurecollection?

To reduce properties of features in a FeatureCollection, use featureCollection.reduceColumns (). Consider the following toy example: // Make a toy FeatureCollection. // Compute a weighted mean and display it. Note that the inputs are weighted according to the specified weight property. The result is therefore:

How to map over a featurecollection in Google Earth?

// Get the centroid of the feature’s geometry. // Return a new Feature, copying properties from the old Feature. // Map the centroid getting function over the features. // Display the results. Note that only a subset of properties is propagated to the features in the new collection.

What is a feature in Google Earth Engine?