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ee.Algorithms.Landsat.simpleComposite
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Page Summary
The algorithm computes a Landsat TOA composite by applying TOA calibration and a cloud score to each pixel.
It selects pixels based on the lowest cloud scores and computes per-band percentile values from the accepted pixels.
The algorithm limits the number of scenes used in regions with many available scenes by selecting the least-cloudy ones.
The simpleComposite function takes arguments such as collection, percentile, cloudScoreRange, maxDepth, and asFloat to customize the composite creation.
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.
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.
[[["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complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2024-07-13 UTC."],[],["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"]]
