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How to access WEkEO products using Data Viewer?
How to access WEkEO products using Data Viewer?

Around 300 EO products are available for free in the WEkEO catalogue, let's explore possibilities offered by Data Viewer!

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


The WEkEO DIAS is the single access point for around 300 products on Earth observation data, available from the WEkEO Data Viewer, on the DATA tab (What data is available in WEkEO?).

In this article we introduce the main functionalities of the WEkEO Data Viewer and the different ways to download the products.

WEkEO Data Viewer exploration and main functions

Add several layers

In the Catalogue, all listed products can be added to our list of layers (on the left).

The first step is to click on the "+" button from the Layers tab (1) and scroll the Catalogue of products. Found the needed one. If the dataset selected has a "Use dataset" button (2), this means that it cannot be viewed on our Viewer, but can only be downloaded.

However, if the button is "Select layers" (3), then it is viewable on the Viewer as well as being downloadable.

💡WEkEO Pro Tip: you can hide/show layers by clicking on the icon 👁️‍🗨️.

Access product's details and summary

Of course, all products have a summary, available by clicking on the "i" option (or on Details, from the Catalogue view):

In this window, the following informations are available:

  • Product's long name (for the example above "Global Ocean 1/2° Physic Analysis Forecast updated Daily")

  • Temporal and geographic extents (on the left column)

  • When available, a link to a Use Case example (e.g. "Innovating access to marine data")

  • An abstract, introducing the product

  • A classification, providing general information, such as the datasetID, the Originating Service, the time and variables

  • Metadata resources

  • Contacts in case of necessity

Map Settings

General settings are also available to user for personal customization of the viewer, you can:

  • hide the Basemap and/or coastline features, which can be useful to observe vegetation data

  • change the horizontal units (in km and km² by default)

Zoom Up

One of the main functionalities of the WEkEO Viewer is its zooming power on the map, which allows to reach and visualize even the highest spatial resolutions.

Timeline crossover

The WEkEO Viewer provides the capability to zoom anywhere on the timeline and elevation bar, to select the perfect area and moment:

Define objects of interest

Finally, the WEkEO viewer also allows to display the coordinates of a point (a), to measures some distances (b), and to define an Area Of Interest (AOI) (c), that you can download afterwards (cf. Data Download section):

Data download

A download option is available too, for free, to all our users (sign up here!).

To resume, two data download interfaces are available:

Viewer-based data download

The first way to download data is using the viewer itself. Indeed, the WEkEO Data Viewer allows to create REST based descriptors, where the manually selected parameters are added to the description script.

Click on the download icon (1) and define the different parameters depending on the dataset (2), mainly:

  • the bounding box coordinates

  • the variables

  • the time range

You just have to click on Request data to launch your request (3). A job (or several jobs) is launched (4). In the Jobs tab you can see their status:

📌Note: as you will see with time, the Jobs tab shows the history of all your previous requests. You can delete them with the cross icon.

Once the jobs are done, you can download them on your computer by clicking on Order (5):

Data will be finally available to the download📥!

HDA API-based data download

A second automated way is using the command lines, by API requests: the Harmonized Data Access (HDA) API enables to uniform access to the whole WEkEO Catalogue, including subsetting and downloading functionalities.

The HDA API request is automatically generated by our services. Click on the download icon (1) and on Show API request (2). Copy the query from the new window (3) and run the script (coming soon):

💡WEkEO Pro Tip: we have an article dedicated to how to download data. If you'd like more information, don't hesitate to check it out.

What's next?

Several methods are available to download WEkEO data, by using Python scripts or via cURL commands.

These articles might be of interest for you:

We are user-driven and we implement users' suggestions, so feel free to contact us:

  • through a chat session available in the bottom right corner of the page

  • via e-mail to our support team (

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