Download sentinel 2 with Sentinelhub

edura · May 23, 2022, 2:21pm

hello! I am trying to download a mosaic corresponding to my area of interest (specifying the coordinates of my polygon). Everything is going fine until I try to visualize the data. I fail in this part. specifically on the second line (when I declare the viable tar). If you can help me find the error I would really appreciate it. Thank you.@batic @max.kampen .

response = oauth.post(f"{url}/api/v1/process", headers=headers, json = request)
tar = tarfile.open(fileobj=io.BytesIO(response.content))
userdata = json.load(tar.extractfile(tar.getmember(‘userdata.json’)))
userdata.

Before that, i made this:
from oauthlib.oauth2 import BackendApplicationClient
from requests_oauthlib import OAuth2Session

# Your client credentials
client_id = ‘xxxx’
client_secret = ‘xxxx’

# Create a session
client = BackendApplicationClient(client_id=client_id)
oauth = OAuth2Session(client=client)
oauth.fetch_token(token_url=‘https://services.sentinel-hub.com/oauth/token’,

                     client_id=client_id, client_secret=client_secret)*

url = ‘https://services.sentinel-hub.com’

evalscript = “”"
//VERSION=3
function setup() {

return {*
input: [“B02”, “dataMask”],*
mosaicking: Mosaicking.ORBIT,*
output: {*
```
 id: "default",*
```
```
 bands: 1*
```
}*
}*
}

function evaluatePixel(samples, scenes, inputMetadata, customData, outputMetadata) {

//Average value of band B02 based on the requested scenes*
var sumOfValidSamplesB02 = 0*
var numberOfValidSamples = 0*
for (i = 0; i < samples.length; i++) {*
var sample = samples[i]*
if (sample.dataMask == 1){*
```
   sumOfValidSamplesB02 += sample.B02*
```
```
   numberOfValidSamples += 1*
```
}*
}*
return [sumOfValidSamplesB02 / numberOfValidSamples]*
}

function updateOutputMetadata(scenes, inputMetadata, outputMetadata) {

outputMetadata.userData = {*
“inputMetadata”: inputMetadata*
}*
outputMetadata.userData[“orbits”] = scenes.orbits*
}
“”"

request = {

“input”: {*
```
   "bounds": {*
```
```
       "properties": {*
```

           "crs": "http://www.opengis.net/def/crs/OGC/1.3/CRS84"*

```
       },*
```
```
       "geometry": {*
```
“type”: “Polygon”,*
“coordinates”: [*
[*
```
 [*
```
```
   -7.19013464948524,*
```
```
   37.1950340145669*
```
```
 ],*
```
```
 [*
```
```
   -7.17017478002351,*
```
```
   37.1323029962586*
```
```
 ],*
```
```
 [*
```
```
   -7.44961295248773,*
```
```
   37.0866804374889*
```
```
 ],*
```
```
 [*
```
```
   -7.60644049825846,*
```
```
   37.5571630748011*
```
```
 ],*
```
```
 [*
```
```
   -7.30419104640941,*
```
```
   38.0048344327285*
```
```
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```
```
 [*
```
```
   -7.11884940140763,*
```
```
   38.0818225006523*
```
```
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```
```
 [*
```
```
   -7.37262488456391,*
```
```
   38.3783691326551*
```
```
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```
```
 [*
```
```
   -7.35266501510218,*
```
```
   38.6834699944273*
```
```
 ],*
```
```
 [*
```
```
   -7.05041556325313,*
```
```
   38.9914222661226*
```
```
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```
```
 [*
```
```
   -7.1644719601773,*
```
```
   39.0427476447384*
```
```
 ],*
```
```
 [*
```
```
   -7.32129950594803,*
```
```
   39.3278886370489*
```
```
 ],*
```
```
 [*
```
```
   -7.12740363117694,*
```
```
   39.441945033973*
```
```
 ],*
```
```
 [*
```
```
   -6.73961188163476,*
```
```
   39.467607723281*
```
```
 ],*
```
```
 [*
```
```
   -6.2349123252453,*
```
```
   39.2394949294326*
```
```
 ],*
```
```
 [*
```
```
   -5.21695898269707,*
```
```
   39.6244352690517*
```
```
 ],*
```
```
 [*
```
```
   -4.07069219360915,*
```
```
   39.6443951385134*
```
```
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```
```
 [*
```
```
   -3.902459008146,*
```
```
   39.5160816919737*
```
```
 ],*
```
```
 [*
```
```
   -2.87024861598225,*
```
```
   40.1947172536726*
```
```
 ],*
```
```
 [*
```
```
   -2.38265751913142,*
```
```
   40.1120263659025*
```
```
 ],*
```
```
 [*
```
```
   -2.12317921612893,*
```
```
   39.9038734415159*
```
```
 ],*
```
```
 [*
```
```
   -2.04904255812821,*
```
```
   39.3335914568951*
```
```
 ],*
```
```
 [*
```
```
   -2.63073018244149,*
```
```
   38.538048088349*
```
```
 ],*
```
```
 [*
```
```
   -3.29510869452479,*
```
```
   38.4097346418093*
```
```
 ],*
```
```
 [*
```
```
   -4.01366399514707,*
```
```
   38.4411001509634*
```
```
 ],*
```
```
 [*
```
```
   -4.45848394315133,*
```
```
   38.2215415868844*
```
```
 ],*
```
```
 [*
```
```
   -5.22836462238949,*
```
```
   38.1816218479609*
```
```
 ],*
```
```
 [*
```
```
   -6.03816504055111,*
```
```
   38.0561598113444*
```
```
 ],*
```
```
 [*
```
```
   -6.34326590232326,*
```
```
   38.0304971220364*
```
```
 ],*
```
```
 [*
```
```
   -6.59418997555644,*
```
```
   37.8537097068039*
```
```
 ],*
```
```
 [*
```
```
   -6.82800558925099,*
```
```
   37.7966815083419*
```
```
 ],*
```
```
 [*
```
```
   -7.19013464948524,*
```
```
   37.5172433358776*
```
```
 ],*
```
```
 [*
```
```
   -7.28993399679389,*
```
```
   37.3604157901069*
```
```
 ],*
```
```
 [*
```
```
   -7.19013464948524,*
```
```
   37.1950340145669*
```
```
 ]*
```
]*
]*
}
```
   },*
```
```
   "data": [*
```
```
       {*
```
```
           "type": "sentinel-2-l2a",*
```
```
           "dataFilter": {*
```
```
               "timeRange": {*
```

                   "from": "2018-10-01T00:00:00Z",*

                   "to": "2018-10-20T00:00:00Z"*

```
               }*
```
```
           }*
```
```
       }*
```
```
   ]*
```
},*
“output”: {*
```
   "width": 512,*
```
```
   "height": 512,*
```
```
   "responses": [*
```
```
       {*
```
```
           "identifier": "default",*
```
```
           "format": {*
```
```
               "type": "image/jpeg",*
```
```
               "quality": 80*
```
```
           }*
```
```
       }*
```
```
   ]*
```
}*
}

headers = {

‘Content-Type’: ‘application/json’,*
‘Accept’: ‘application/x-tar’*
}

dorothyrono · May 24, 2022, 8:12am

Hi Elena

You were almost there.

You need to add an additional response, i.e the userdata response to the output. You can copy this code below

"output": {
   "width": 512,
   "height": 512,
   "responses": [
       {
           "identifier": "default",
           "format": {
               "type": "image/jpeg",
               "quality": 80
           }
       },
       {
        "identifier": "userdata",
        "format": {
          "type": "application/json"
        }
      }
   ]
},

Let us know if that solves the error