AI-generated Key Takeaways
-
ui.Chart.image.doySeriesByYeargenerates a chart that displays the derived value of a specific band within a region over time, plotted by day-of-year across multiple years. -
The chart's x-axis represents the day of year, the y-axis represents the derived band value (after regional reduction), and different series represent different years in the dataset.
-
Users can customize the chart by specifying the image collection, band name, region of interest, reducers for regional and same-day aggregation, and the start and end days of the year for the analysis.
-
Default values are provided for region, reducers, and start/end days, offering flexibility and convenience for generating the chart with minimal required input.
- X-axis: Day of year (startDay to endDay, defaults to 1 to 366).
- Y-axis: Derived band value (reduced within the region).
- Series: Years.
Returns a chart.
| Usage | Returns |
|---|---|
ui.Chart.image.doySeriesByYear(imageCollection, bandName, region, regionReducer, scale, sameDayReducer, startDay, endDay) | ui.Chart |
| Argument | Type | Details |
|---|---|---|
imageCollection | ImageCollection | The ImageCollection to chart. |
bandName | Number|String | The name of the band to chart. |
region | Feature|FeatureCollection|Geometry, optional | The region to reduce. Defaults to the union of all geometries in the image collection. |
regionReducer | Reducer, optional | Reducer for aggregating band values within the region. Must return a single value. Defaults to ee.Reducer.mean(). |
scale | Number, optional | Scale to use with the region reducer in meters. |
sameDayReducer | Reducer, optional | Reducer for aggregating band values across images with the same (DoY, year) pair. Must return a single value. Defaults to ee.Reducer.mean(). |
startDay | Number, optional | Day of year to start the series. Must be between 1 and 366. |
endDay | Number, optional | Day of year to end the series. Must be between startDay and 366. |