Dear Iglw4,

is there any specific reason you are using a custom script and not the default visualization layer for the NDVI? If you use that layer, the correct statistics for the NDVI will be returned. I recommend you to use the prepared NDVI layer and check if the statistic for that is what you expect.

If you want to use a custom script to calculate the FIS (within EO Browser), you will see in the result that it says “Based on the last band of the custom script”.

I assume that’s the difference you are experiencing is coming from that fact. If you want to get the correct statistics for the NDVI using a custom script, you can use the one below. It returns only 1 band (that holds the NDVI) and thus gives the correct statistic (note that here you don’t get the median/P10/P90 which is included in the default option).

function index(x, y) {

	return (x - y) / (x + y);

}



function isCloud (scl) {

  if (scl == 3) { // SC_CLOUD_SHADOW

    return false;

  } else if (scl == 9) { // SC_CLOUD_HIGH_PROBA

    return true; 

  } else if (scl ==  { // SC_CLOUD_MEDIUM_PROBA

    return true;

  } else if (scl == 7) { // SC_CLOUD_LOW_PROBA

    return false;

  } else if (scl == 10) { // SC_THIN_CIRRUS

    return true;

  } else if (scl == 11) { // SC_SNOW_ICE

    return false;

  } else if (scl == 1) { // SC_SATURATED_DEFECTIVE

    return false;

  } else if (scl == 2) { // SC_DARK_FEATURE_SHADOW

     return false;

  }

  return false;

}



const cloud = isCloud (SCL)

const ndvi = index(B08, B04);

//return cloud ? cNumber.NaN, 1] : Nndvi, 0];

return cloud ? cndvi, 1] : indvi, 0];

Best,

Daniel

Thank you so much Daniel…

Regards