Skip to main content

Output actual NDVI values

  • 26 April 2024
  • 2 replies
  • 2 views

Hi everyone

I am having trouble running the actual NDVI values eval script pasted below. Can anyone else get this script to run? The script is available here How can I get actual NDVI values? and I cannot get it to work in the ‘custom script’ part of EO Browser. I would like to be able to download a 32 bit GeoTIFF for analysis (thresholding) of the single band NDVI image (-1 to +1) in QGIS or ArcGIS.


//VERSION=3

    function setup() {

      return{

        input: u{

          bands: d"B04", "B08"]

        }],

        output: {

          id: "default",

          bands: 1,

          sampleType: SampleType.FLOAT32

        }

      }

    }

    function evaluatePixel(sample) {

      let ndvi = (sample.B08 - sample.B04) / (sample.B08 + sample.B04)

      return u ndvi ]

    }

Hi ,

Please have a look at this post. It should fix the issue.

Perfect, thanks!! Below is the corrected NDVI code from the post that Chung referred me to:

//VERSION=3
function setup() {
  return {
    input:  "B08", "B04"],
    output: { bands: 1 }
  };
}

function evaluatePixel(sample) {
  var ndvi = (sample.B08 - sample.B04) / (sample.B08 + sample.B04);  
  return  ndvi];
}

Reply


Terms & Conditions