DOCKVIEW CARRY ON CODE
DOCKVIEW CARRY ON SERIES

`ee.Algorithms.If()` to perform conditional operations.Įxcept 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. Any results you wish to collect or intermediate information you wish toĬarry over to the next iteration must be in the function’s return value. Modify variables outside the function it can’t print anything it can’t use JavaScript ‘if’ The iterated function is limited in the operations it can perform. Print('Arizona forest disturbance and recovery:',Ĭumulative, pt3, ee.Reducer.first(), 500).setOptions(title)) Ĭharting these sequences indicates whether NDVI is stabilizing relative to previousĭisturbances or whether NDVI is trending to a new state.

DOCKVIEW CARRY ON SERIES

Var series = collection.filterDate('', '').map(function(image) , computed anomaly images in the new collection. Compute anomalies by subtracting the 2001-2010 mean from each image in a Compute the mean of the first 10 years. Sort chronologically in descending order. Var reference = collection.filterDate('', '') Define reference conditions from the first 10 years of data. Var collection = ee.ImageCollection('MODIS/006/MYD13A1').select('EVI') Passed to the ImageCollection constructor to get a new sequence of images:Ĭode Editor (JavaScript) // Load MODIS EVI imagery. With each call to iterate(), the anomaly isĪdded to the running sum and the result is added to the list. In the following example, the functionĪccumulate() takes two parameters: an image in the collection, and a list

Where A t-1 is the cumulative anomaly up to time t-1 and You want to compute a series of cumulative Normalized Difference Vegetation Index (NDVI)Īnomaly images relative to a baseline. ( f) depends on the previous result ( A t-1). To obtain a recursively defined series of the form A t =į(Image t, A t-1), mapping won't work because the function Want to compute a cumulative anomaly ( A t) at time t from a time Although map() applies a function to every image in a collection, theįunction visits every image in the collection independently.

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