Parsing cloud coverage Landsat-8

Hi! I am trying to get all the available dates for Landsat-8 over custom areas. For Sentinel I am using the catalog API and I can parse cloud coverage as a query option, but for Landsat-8 I don’t have that option. Is there any other way i can get the available dates, filtered by cloud percentage? Thank you!

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Hi Eduardo,

You should be able to parse cloud coverage as a query option for Landsat also. Here is an example:

curl -X POST https://services-uswest2.sentinel-hub.com/api/v1/catalog/search 

 -H 'Content-Type: application/json' 

 -H 'Authorization: Bearer <my-token>' 

 -d '{

  "collections": [

    "landsat-ot-l2"

  ],

  "datetime": "2021-12-01T00:00:00Z/2022-02-10T23:59:59Z",

  "bbox": [

    12.44693,

    41.870072,

    12.541001,

    41.917096

  ],

  "limit": 10,

  "query": {

    "eo:cloud_cover": {

      "lt": 20

    }

  }

}'

I don’t know why it didn’t work before, thank you! I have another question now regarding the ColorGradientVisualizer.createBlueRed(minVal, maxVal) method in the evalscripts. Can you tell me how the gradient is made in terms of step size and colors? I need this information to create a dynamic legend, thanks!

The ColorGradientVisualizer.createBlueRed(minVal, maxVal) method interpolates values based on a set colour map.

It uses the colorgradientvisualizer method to interpolate colour based on the bluered colour pairs.