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HDA API request gives no results: what should I do?
HDA API request gives no results: what should I do?

Let's see the resolution steps to follow if an HDA API request gives no results.

David Bina avatar
Written by David Bina
Updated over a week ago

Context


As introduced in this article, WEkEO provides the HDA API in order to download and process quickly needed data. However, some errors may appear.

In this article, we will focus on the case where the query selected from a notebook or code you find somewhere (Jupyter Catalogue, WEKEO Github, etc.) did not get any results:

Step by step guide


Step 1. Get request from WEkEO GUI

When this happens, the first thing to do is to recreate the request via the WEkEO Data Viewer:

  1. Copy/paste the datasetID in the search bar (1) and click on Add to map (2):

  2. Click on the download button and fill in the same parameters as the initial query:

  3. Once you have defined the same parameters, click on Show API request:

Step 2. Compare both requests

This is the "new" request we generated via the WEkEO GUI:

{
"datasetId": "EO:EUM:DAT:SENTINEL-3:OL_1_EFR___",
"boundingBoxValues": [
{
"name": "bbox",
"bbox": [
-8.858882812500033,
43.337081786621994,
1.5467890624999683,
51.9322417526715
]
}
],
"dateRangeSelectValues": [
{
"name": "position",
"start": "2021-09-29T00:00:00.000Z",
"end": "2021-09-30T00:00:00.000Z"
}
],
"stringChoiceValues": [
{
"name": "sat",
"value": "Sentinel-3A"
},
{
"name": "type",
"value": "OL_1_EFR___"
},
{
"name": "timeliness",
"value": "NT"
}
]
}

We can see several differences in the stringChoiceValues category:

Request from notebook

Request from WEkEO GUI

"name": "platformname"

"name": "sat"

"name": "producttype"

"name": "type"

"name": "timeliness",

"value": "Non Time Critical"

"name": "timeliness"

"value": "NT"

Step 3. Run the query

Now you can copy/paste the last request into your notebook and re-run it!

Congrats! You managed to download the data πŸ™Œ

What's next?


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