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Adds Cloud Score+ to the Sentinel-2 derived datasets page.
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PiperOrigin-RevId: 585745564
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Google Earth Engine Community Authors authored and copybara-github committed Nov 27, 2023
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21 changes: 8 additions & 13 deletions catalog/GOOGLE/GOOGLE_CLOUD_SCORE_PLUS_V1_S2_HARMONIZED.jsonnet
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Expand Up @@ -22,16 +22,11 @@ local self_ee_catalog_url = ee_const.ee_catalog_url + basename;
Cloud Score+ is a quality assessment (QA) processor for medium-to-high
resolution optical satellite imagery. The Cloud Score+ S2_HARMONIZED
dataset is being operationally produced from the
[harmonized Sentinel-2 L1C collection](https://developers.google.com/earth-engine/datasets/catalog/COPERNICUS_S2_HARMONIZED).
Cloud Score+ outputs do not explicitly provide labels, e.g., "cloud" and
"cloud shadow". Instead, QA artifacts are defined on a continuous scale
based on ground occlusion with respect to solar radiation or the imaging
sensor: if a ray incident to or reflected from a ground pixel is absorbed
or reflected by the atmosphere, the QA score is lower. Functionally, Cloud
Score+ provides a holistic per-pixel "usability" score that can be
thresholded to mask or even weight observations used for downstream tasks
such as time series analysis or classification.
[harmonized Sentinel-2 L1C collection](https://developers.google.com/earth-engine/datasets/catalog/COPERNICUS_S2_HARMONIZED),
and Cloud Score+ outputs can be used to identify relatively clear pixels and
effectively remove clouds and cloud shadows from [L1C (Top-of-Atmosphere)](https://developers.google.com/earth-engine/datasets/catalog/COPERNICUS_S2_HARMONIZED)
or [L2A (Surface Reflectance)](https://developers.google.com/earth-engine/datasets/catalog/COPERNICUS_S2_SR_HARMONIZED)
imagery.
The Cloud Score+ S2_HARMONIZED dataset includes two QA bands, `cs` and
`cs_cdf`, that both grade the usability of individual pixels with respect to
Expand All @@ -48,9 +43,9 @@ local self_ee_catalog_url = ee_const.ee_catalog_url + basename;
pixel through time, how would this score rank?).
Images in the Cloud Score+ S2_HARMONIZED collection have the same id and
`system:index` properties as the individual Sentinel-2 L1C assets from which
they were produced such that Cloud Score+ bands can be linked to source
images based on their shared `system:index`.
`system:index` properties as the individual [Sentinel-2 L1C](https://developers.google.com/earth-engine/datasets/catalog/COPERNICUS_S2_HARMONIZED)
assets from which they were produced such that Cloud Score+ bands can be
linked to source images based on their shared `system:index`.
Cloud Score+ backfill for the entire Sentinel-2 archive is currently in
progress and Dataset Availability dates will be updated periodically as new
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