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I have used Custom script editor in order to create script that will mask clouds. I want to check if they are really masked by plotting the image.

The problem is that when I use get_data and priint the results, the results are in UINT8.


This is my costum script in the cinfugruation utility:


//VERSION=3

function setup() {

  return {

    input: ["B04", "B08", "CLM"],

    output: { bands: 1 },

    sampleType:"FLOAT32"

  };

}



function evaluatePixel(sample) {

  let ndvi = index(sample.B08, sample.B04);

  if (sample.CLM == 1) {

    return [null]

  }

  return [ndvi];

}

the idea- return null value if there is a cloud.


Then when I retrieve images and print the values:


wms_bands_request = WmsRequest(

            data_collection=DataCollection.SENTINEL2_L2A,

            data_folder='{}/{}/{}'.format(folder_,date,plot),

            layer='NDVI_MASK_CLOUD',

            bbox=bbox,

            time=date,

            width=bbox_size[0],

            height=bbox_size[1],

            image_format=MimeType.TIFF,

            time_difference=datetime.timedelta(hours=2),#get one image when there is small time differences between them

            config=config)

        

        

        wms_bands_img = wms_bands_request.get_data(save_data=False)

image


I have no idea why does it happen as the sampleType in the costum script is float32.

You have defined the “sampleType” outside of the “output” block, so it is essentially ignored, replaced with DEFAULT, which is UINT8.


Try replacing your EVALSCRIPT setup() part with:


function setup() {

  return {

    input:  "B04", "B08", "CLM"],

    output: {

      bands: 1, 

      sampleType: "FLOAT32"

    }

  };

}

More info in the documentation:

docs.sentinel-hub.com
d3714e73b38a87afa3c31502a6696052a7395163.png


Evalscript V3



Evalscript V3 is a powerful tool for imagery visualization, multitemporal scripting, datafusion, scene filtering, etc.










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