Refreshing Google Earth Engine App

Introduction

Google Earth Engine (GEE) is a powerful platform for geospatial analysis and visualization. The GEE App is a user-friendly interface that allows users to create and share custom applications for various geospatial tasks. However, as users work on their applications, they may need to reset the app to its initial state, removing added layers and geometries, and clearing user-entered values. In this article, we will discuss how to refresh a GEE App to its initial state.

Understanding the GEE App Structure

A GEE App typically consists of a Map panel and a Panel panel. The Map panel displays the geospatial data, while the Panel panel contains various widgets and tools for interacting with the data. The app may also include additional panels for specific tasks, such as data analysis or visualization.

Resetting the GEE App

To reset a GEE App to its initial state, you can use the following steps:

Step 1: Remove Added Layers and Geometries

To remove added layers and geometries, you can use the Map.removeLayer() method. This method removes a layer from the map, but it does not remove the underlying data. To remove the underlying data, you can use the Map.remove() method.

// Remove a layer from the map
map.removeLayer(layer);
// Remove the underlying data
map.remove();

Step 2: Clear User-Entered Values

To clear user-entered values, you can use the Widget.setValue() method to set the value of each widget to its default value. You can also use the Widget.clear() method to clear the value of each widget.

// Clear the value of a text box
widget.setValue('');
// Clear the value of a checkbox
widget.setValue(false);
// Clear the value of a dropdown menu
widget.setValue('');

Step 3: Reset the Map View

To reset the map view, you can use the Map.setCenter() method to set the center of the map to its default value. You can also use the Map.setZoom() method to set the zoom level of the map to its default value.

// Reset the map view
map.setCenter(defaultCenter);
map.setZoom(defaultZoom);

Step 4: Reset the Panel View

To reset the panel view, you can use the Panel.clear() method to clear the panel of all widgets. You can also use the Panel.add() method to add the default widgets to the panel.

// Reset the panel view
panel.clear();
// Add the default widgets to the panel
panel.add(defaultWidget);

Example Code

Here is an example code that demonstrates how to refresh a GEE App to its initial state:

// Get the map and panel objects
var map = ui.Map();
var panel = ui.Panel();
// Add a layer to the map
var layer = ee.FeatureCollection('users/username/layer');
map.addLayer(layer);
// Add a text box to the panel
var textBox = ui.TextBox(
value 'Hello, World!'
);
panel.add(textBox);
// Add a checkbox to the panel
var checkbox = ui.Checkbox(
value true
);
panel.add();
// Add a dropdown menu to the panel
var dropdown = ui.Select(
options ['Option 1', 'Option 2', 'Option 3']
);
panel.add(dropdown);
// Reset the app to its initial state
function resetApp() {
// Remove the added layer and geometry
map.removeLayer(layer);
map.remove();
// Clear the user-entered values
textBox.setValue('');
checkbox.setValue(false);
dropdown.setValue('');
// Reset the map view
map.setCenter(defaultCenter);
map.setZoom(defaultZoom);
// Reset the panel view
panel.clear();
panel.add(defaultWidget);
}
// Add a button to the panel to reset the app
var button = ui.Button(
label 'Reset App'
);
button.onClick(resetApp);
panel.add(button);

Conclusion

In this article, we discussed how to refresh a GEE App to its initial state. We covered the steps to remove added layers and geometries, clear user-entered values, reset the map view, and reset the panel view. We also provided an example code that demonstrates how to refresh a GEE App to its initial state. By following these steps, you can easily reset your GEE App to its initial state and start working on a new project.

Additional Resources

For more information on the GEE App and its features, please refer to the following resources:

• Google Earth Engine Documentation
• Google Earth Engine API Reference
• Google Earth Engine Tutorials

FAQs

Q: How do I remove a layer from the map? A: You can use the Map.removeLayer() method to remove a layer from the map.

Q: How do I clear the value of a text box? A: You can use the Widget.setValue() method to set the value of the text box to an empty string.

Q: How do I reset the map view? A: You can use the Map.setCenter() method to set the center of the map to its default value, and the Map.setZoom() method to set the zoom level of the map to its default value.

Introduction

Google Earth Engine (GEE) is a powerful platform for geospatial analysis and visualization. The GEE App is a user-friendly interface that allows users to create and share custom applications for various geospatial tasks. However, as users work on their applications, they may have questions about how to use the GEE App. In this article, we will answer some frequently asked questions about the GEE App.

Q: What is the Google Earth Engine App?

A: The Google Earth Engine App is a user-friendly interface that allows users to create and share custom applications for various geospatial tasks. It provides a simple and intuitive way to work with geospatial data, including maps, layers, and widgets.

Q: How do I create a new GEE App?

A: To create a new GEE App, you can follow these steps:

1. Go to the Google Earth Engine website and sign in with your Google account.
2. Click on the "New App" button to create a new app.
3. Choose a template or start from scratch.
4. Add layers, widgets, and other features to your app.
5. Customize the appearance and behavior of your app.

Q: How do I add a layer to my GEE App?

A: To add a layer to your GEE App, you can follow these steps:

1. Click on the "Add Layer" button in the app editor.
2. Choose a layer type, such as a map, image, or feature collection.
3. Select the layer data source, such as a Google Earth Engine dataset or a custom dataset.
4. Configure the layer settings, such as the layer name, description, and visibility.
5. Add the layer to the map.

Q: How do I add a widget to my GEE App?

A: To add a widget to your GEE App, you can follow these steps:

1. Click on the "Add Widget" button in the app editor.
2. Choose a widget type, such as a text box, checkbox, or dropdown menu.
3. Configure the widget settings, such as the widget name, description, and value.
4. Add the widget to the panel.

Q: How do I customize the appearance of my GEE App?

A: To customize the appearance of your GEE App, you can follow these steps:

1. Click on the "Customize" button in the app editor.
2. Choose a theme or create a custom theme.
3. Configure the color scheme, font, and other visual settings.
4. Save the changes.

Q: How do I share my GEE App with others?

A: To share your GEE App with others, you can follow these steps:

1. Click on the "Share" button in the app editor.
2. Choose a sharing option, such as a link or a embed code.
3. Configure the sharing settings, such as the visibility and permissions.
4. Share the link or embed code with others.

Q: How do I reset my GEE App to its initial state?

A: To reset your GEE App to its initial state, you can follow these steps:

1. Click on the "Reset" button in the app editor.
2. Confirm that you want to reset the app.
3. The app will be reset to its initial state.

Q: How do I troubleshoot issues with my GEE App?

A: To troubleshoot issues with your GEE App, you can follow these steps:

1. Check the app logs for errors or warnings.
2. Review the app settings and configuration.
3. Test the app with different data and scenarios.
4. Contact the Google Earth Engine support team for assistance.

Conclusion

In this article, we answered some frequently asked questions about the Google Earth Engine App. We covered topics such as creating a new app, adding layers and widgets, customizing the appearance, sharing the app, resetting the app, and troubleshooting issues. By following these steps and tips, you can create and share custom applications with the Google Earth Engine App.

Additional Resources

For more information on the Google Earth Engine App and its features, please refer to the following resources:

• Google Earth Engine Documentation
• Google Earth Engine API Reference
• Google Earth Engine Tutorials

FAQs

Q: How do I create a new GEE App? A: To create a new GEE App, you can follow the steps outlined in the "Creating a New App" section.

Q: How do I add a layer to my GEE App? A: To add a layer to your GEE App, you can follow the steps outlined in the "Adding a Layer" section.

Q: How do I add a widget to my GEE App? A: To add a widget to your GEE App, you can follow the steps outlined in the "Adding a Widget" section.

Q: How do I customize the appearance of my GEE App? A: To customize the appearance of your GEE App, you can follow the steps outlined in the "Customizing the Appearance" section.

Q: How do I share my GEE App with others? A: To share your GEE App with others, you can follow the steps outlined in the "Sharing the App" section.

Q: How do I reset my GEE App to its initial state? A: To reset your GEE App to its initial state, you can follow the steps outlined in the "Resetting the App" section.