How to filter featurecollection in Google Earth Engine?

How to filter featurecollection in Google Earth Engine?

For example: // Load watersheds from a data table. // Convert ‘areasqkm’ property from string to number. // Define a region roughly covering the continental US.

How to filter watersheds in Google Earth Engine?

// Filter to get only larger continental US watersheds. // Check the number of watersheds after filtering for size and location. 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.

Is there a way to filter a featurecollection?

Filtering a FeatureCollection Filtering a FeatureCollection is analogous to filtering an ImageCollection. (See the Filtering an ImageCollection section). There are the featureCollection.filterDate (), and featureCollection.filterBounds () convenience methods and the featureCollection.filter () method for use with any applicable ee.Filter.

Where does the printed object in Google Earth come from?

The printed object is a // dictionary where keys are column names and values are datatypes. Note: Computed collections may not have column information available as part of the collection metadata. Metadata exists for collections within the Data Catalog and those stored as assets.

How to filter featurecollection by geometry type in Gee?

I have a featurecollection with 141 objects inside (135 polygon, 4 geometrycollection and 2 multipolygon) an I have problems to indicate in a loop the region for images exportation in GEE, so I need to filter in the collection only the objects of polygon type for example for run the code easily. You didn’t share your collection.

Where does metadata come from in Google Earth?

Metadata exists for collections within the Data Catalog and those stored as assets. During some operations, however, metadata can be lost (joins, mapping, etc.). Additionally, collections not retrieved from disk (“computed collections”, like those derived from lists or reduceRegions ()) may lack meaningful type information.

How to know the names of featurecollection columns?

Knowing the names and dataypes of FeatureCollection columns can be helpful (e.g., filtering a collection by metadata ). The following example prints column names and datatypes for a collection of point features representing protected areas. // Import a protected areas point feature collection.

How to visualize geometry in Google Earth Engine?

To visualize a geometry, add it to the map. For example: // Create a geodesic polygon. // Create a planar polygon. // Display the polygons by adding them to the map. For more on visualizing, see Feature and FeatureCollection Visualization.

How to create a geodesic polygon in Google Earth?

// Create a geodesic polygon. // Create a planar polygon. // Display the polygons by adding them to the map. For more on visualizing, see Feature and FeatureCollection Visualization. To view information about a geometry, print it.

How to get information from Google Earth Engine?

To access the information programmatically, Earth Engine provides several methods. For example, to get information about the polygon created previously, use: // Print polygon area in square kilometers. // Print polygon perimeter length in kilometers. // Print the geometry as a GeoJSON string.

How to display composites in Google Earth Engine?

// Display the composites. 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. Java is a registered trademark of Oracle and/or its affiliates.

How does mapping a function over a collection work?

Mapping a function over a collection applies the function to every element in the collection. By default, all units in Earth Engine are in meters. Let’s run some these operations over the state of Connecticut, US using geometries of the public US counties feature collection available on Earth Engine: