Announcement: All noncommercial projects registered to use Earth Engine beforeApril 15, 2025mustverify noncommercial eligibilityto maintain access. If you have not verified by September 26, 2025, your access may be on hold.
ee.ImageCollection.unionStay organized with collectionsSave and categorize content based on your preferences.
Merges all geometries in a given collection into one and returns a collection containing a single feature with only an ID of 'union_result' and a geometry.
Usage
Returns
ImageCollection.union(maxError)
FeatureCollection
Argument
Type
Details
this:collection
FeatureCollection
The collection being merged.
maxError
ErrorMargin, default: null
The maximum error allowed when performing any necessary reprojections. If not specified, defaults to the error margin requested from the output.
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Missing the information I need","missingTheInformationINeed","thumb-down"],["Too complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2023-10-06 UTC."],[],[]]