ee.ImageCollection.reduce
Applies a reducer across all of the images in a collection.
If the reducer has a single input, it will be applied separately to each band of the collection; otherwise it must have the same number of inputs as the collection has bands.
The reducer output names determine the names of the output bands: reducers with multiple inputs will use the output names directly, while reducers with a single input will prefix the output name with the input band name (e.g., '10_mean', '20_mean').
| Usage | Returns |
|---|
ImageCollection.reduce(reducer, parallelScale) | Image |
| Argument | Type | Details |
|---|
this: collection | ImageCollection | The image collection to reduce. |
reducer | Reducer | The reducer to apply to the given collection. |
parallelScale | Float, default: 1 | A scaling factor used to limit memory use; using a larger parallelScale (e.g., 2 or 4) may enable computations that run out of memory with the default. |
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.
Last updated 2024-07-13 UTC.
[null,null,["Last updated 2024-07-13 UTC."],[[["Applies a reducer function across all images within an ImageCollection, resulting in a single output Image."],["Reducers can operate on individual bands or multiple bands simultaneously, determining the output band names accordingly."],["Utilizes a parallelScale factor to manage memory consumption during computation."],["Access this functionality via the `ImageCollection.reduce()` method, providing the reducer and optional parallelScale as parameters."]]],[]]