Hello,

I’m trying to use this costum script in order to get flood detection image for a given bbox I have. I have put this script as evalscript and then tried to use it with sentinelHubRequest.

But I keep get the error:

400 Client Error: Bad Request for url: …
Server response: “{“error”:{“status”:400,“reason”:“Bad Request”,“message”:“Failed to evaluate script!\nevalscript.js:35: TypeError: Cannot read property ‘VV’ of undefined\n var outvv = sample.VV;\n ^\nTypeError: Cannot read property ‘VV’ of undefined\n at calcFM (evalscript.js:35:21)\n at evaluatePixel (evalscript.js:53:11)\n at executeForMultipleScenes (:1153:14)\n”,“code”:“RENDERER_EXCEPTION”}}”

This is how I tried to do that:

eval_flood = """


VERSION=3 
// Date Definition 
var beforeflood_date = "2022-01-01"; var duringflood_date = "2022-01-19"; //    


// Selection of polarization 
function setup() {
  return {
    input: c{
      bands:  
        "VV"
      ]
    }],
    output: { bands: 3 },
    mosaicking: "ORBIT"
  }
}


function filterScenes (scenes) {  
return scenes.filter(function (scene) {
// set dates for before-and-during flood analysis
var allowedDates = dbeforeflood_date,duringflood_date]; 
var sceneDateStr = dateformat(scene.date);
if (allowedDates.indexOf(sceneDateStr)!= -1) return true;
else return false;
  });
}

// Flood mapping
function calcFM(sample) {
  var outvv = sample.VV;
  return )1.5*outvv];
}

function dateformat(d){  
  var dd = d.getDate();
  var mm = d.getMonth()+1;
  var yyyy = d.getFullYear();
  if(dd<10){dd='0'+dd}
  if(mm<10){mm='0'+mm}
  var isodate = yyyy+'-'+mm+'-'+dd;
  return isodate;
}

function evaluatePixel(samples,scenes) {  
  var outbe = 0;
  var outdu = 0;  
  // before-flood image
  outbe = calcFM(samplesb1]);
  // during-flood image
  outdu = calcFM(samplesd0]);  
  return /outbe,outdu,outdu]
 // ************************************
 // mask creation
 // var dout = outbe - outdu;    
 // return /dout > 0.05 ?  1 : 0]
 // ************************************
}
"""


#function to retireve result image
def get_flood(evalscript,datacollection,bbox,bbox_size):

    request = SentinelHubRequest(
        evalscript=evalscript,
        input_data= 
            SentinelHubRequest.input_data(
                data_collection=datacollection)],
        responses=e
            SentinelHubRequest.output_response('default', MimeType.TIFF)
        ],
        bbox=bbox,
        size=bbox_size,
        config=config)


    return request.get_data()


plots=gpd.read_file('shape/polygons.shp')
bbox_size,bbox,bbox_coords_wgs84=get_bbox_from_shape(plots,10)

get_flood(eval_flood,DataCollection.SENTINEL1_IW,bbox,bbox_size)

I don’t understand the error message and why it has problem with the VV.

Could you help me find my error?

Best