ee.Algorithms.Landsat.simpleComposite
Computes a Landsat TOA composite from a collection of raw Landsat scenes. It applies standard TOA calibration and then assigns a cloud score to each pixel using the SimpleLandsatCloudScore algorithm. It selects the lowest possible range of cloud scores at each point and then computes per-band percentile values from the accepted pixels. This algorithm also uses the LandsatPathRowLimit algorithm to select only the least-cloudy scenes in regions where more than maxDepth input scenes are available.
| Usage | Returns |
|---|
ee.Algorithms.Landsat.simpleComposite(collection, percentile, cloudScoreRange, maxDepth, asFloat) | Image |
| Argument | Type | Details |
|---|
collection | ImageCollection | The raw Landsat ImageCollection to composite. |
percentile | Integer, default: 50 | The percentile value to use when compositing each band. |
cloudScoreRange | Integer, default: 10 | The size of the range of cloud scores to accept per pixel. |
maxDepth | Integer, default: 40 | An approximate limit on the maximum number of scenes used to compute each pixel. |
asFloat | Boolean, default: false | If true, output bands are in the same units as the Landsat.TOA algorithm; if false, TOA values are converted to uint8 by multiplying by 255 (reflective bands) or subtracting 100 (thermal bands) and rounding to the nearest integer. |
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Last updated 2024-07-13 UTC.
[null,null,["Last updated 2024-07-13 UTC."],[[["Creates a Landsat composite image by selecting the least cloudy pixels from a collection of raw Landsat scenes using the SimpleLandsatCloudScore algorithm."],["Computes per-band percentile values from the accepted pixels, allowing users to specify the desired percentile."],["Limits the number of scenes used in the composite for each pixel to reduce computation and potentially enhance image quality."],["Offers flexibility in output data type, providing options for both floating-point and integer representations of TOA reflectance."],["Employs the LandsatPathRowLimit algorithm to prioritize the least cloudy scenes in areas with abundant data."]]],["The algorithm creates a Landsat TOA composite from raw scenes. It calibrates TOA, assigns cloud scores per pixel using SimpleLandsatCloudScore, and selects the lowest cloud score range at each point. It then calculates per-band percentile values from these pixels. The LandsatPathRowLimit algorithm ensures only the least-cloudy scenes are selected when more than `maxDepth` scenes are present. Users specify the raw collection, percentile, cloud score range, scene depth, and whether to output as floats.\n"]]