Contents
How to make a JavaScript list in Earth Engine?
Note that the methods of Earth Engine objects return other Earth Engine objects. To make a JavaScript list into an ee.List object on the server, you can put a JavaScript literal into a container as with numbers and strings. Earth Engine also provides server-side convenience methods for making sequences of numbers. For example:
How to initialize the Google Earth Engine object?
At construction time, you can use JavaScript functionality to initialize the Earth Engine object. In this case an ee.Dictionary is constructed directly from a JavaScript literal object: // Make a Dictionary on the server. // Get some values from the dictionary.
How to cast a number to an Earth Engine object?
This is common with the get () function, which could return all sorts of Earth Engine objects. To correct it, use the ee.Number constructor to cast the result: // Cast the return value of get () to a number. You can construct an Earth Engine Dictionary from a JavaScript object, as with strings, numbers and lists.
What are the Constructors in Google Earth Engine?
The ee.String () and ee.Number () methods are constructors. A constructor takes its argument (and possibly other parameters), puts it in a container, and returns the container and its contents as an Earth Engine object that you can manipulate in your code. Any constructor starting with ee returns an Earth Engine object.
Which is an example of an Earth Engine object?
In this example, log () is a method for a ee.Number object. (Use the Docs tab at the left side of the code editor to see a list of all the methods for every Earth Engine object type, for example ee.Number > log ()). Note that the methods of Earth Engine objects return other Earth Engine objects.
How to send a string to Earth Engine?
For example, define a string, then put it into the ee.String () container to be sent to Earth Engine: // Define a string, then put it into an EE container. var aString = ‘To the cloud!’; Think of ee.Thing as a container for a thing that exists on the server.
How to use ee.number in Earth Engine?
You have to use the equivalent method defined for an ee.Number: // Use a built-in function to perform an operation on the number. In this example, log () is a method for a ee.Number object. (Use the Docs tab at the left side of the code editor to see a list of all the methods for every Earth Engine object type, for example ee.Number > log ()).
How to create an Earth Engine image object?
Open the Code Editor webpage in Google Chrome, if it is not already open: https://code.earthengine.google.com/ 2. Click on the dropdown arrow adjacent to the Reset button and select Clear script. 1. Use the code in the box below to create a variable representing an ee.Image object for a Landsat 8 image.
Is there a code editor for Google Earth Engine?
The Earth Engine (EE) Code Editor at code.earthengine.google.com is a web-based IDE for the Earth Engine JavaScript API. Code Editor features are designed to make developing complex geospatial workflows fast and easy. The Code Editor has the following elements (illustrated in Figure 1): JavaScript code editor.