Context
The WEkEO DIAS allows users to visualize and download data from the Data Viewer for free. All you need to do is to create a WEkEO account.
The WEkEO catalog centralizes datasets coming from different services that can be downloaded via two methods: from the data viewer directly or via the Harmonized Data Acces (HDA) API in a script.
Download data from the Data Viewer
Step 1. Open the Data Viewer
You can access the Data Viewer by clicking on DATA from the WEkEO menu.
When you first arrive on the page, two layers are already displayed: the Copernicus Land normalized difference vegetation index product (1) and Copernicus Marine sea water velocity (2):
Step 2. Add the datasets to the map
Add the datasets you want to download by clicking on the "+" icon in the Layers tab.
It will open the WEkEO Catalogue where you can use filters on the left to find datasets more easily:
For example, if you use the filters and select CLMS (Land) in the Copernicus Service section and Global in the Area section, you will find quickly by scrolling the dataset we choose for the purpose of this article and add it to the map:
📌Note: a dataset from the Catalogue will be added directly to the map while a product will show all the datasets it contains. You can then choose the dataset(s) of the product you want to display. The number of displayable datasets is shown by the icon next to the product/dataset name.
The layer of this dataset has now been added in the Layers panel and displayed automatically on the map.
💡WEkEO Pro Tip: you can hide/show layers by clicking on the eye icon👁️🗨️.
Step 3. Define your subsetting parameters
Click on the download icon to develop the canvas (1) where you can play with different parameters depending on the dataset (2), mainly:
the bounding box coordinates (when available)
the variables (when available)
the time range
You just have to click on Request data to launch your request (3):
Step 4. Download the data
Once you clicked on Request data, a job or several jobs depending on your request are launched. You can see them in the Jobs tab by clicking on Monitor request or on Jobs directly:
📌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 by clicking on Order:
And voilàààà! You have downloaded your data 😊
⚠️The Jobs tab displays all the jobs made with the HDA API (cf. next section) which are deleted every 7 days, so be sure to download all data you need before they are removed.
Download data via the HDA API
Copy your query
From the Data Viewer, you can get the query by clicking on Show API request button (1) (cf. step 3) and then on the Copy button(2):
💡WEkEO Pro Tip: this is the query you can paste in your message to the WEkEO Support when you are encountering some issues.
Consume the HDA API
WEkEO users can also retrieve data using programmatic approaches, by consuming the Harmonized Data Access (HDA) API, that enables to uniform access to the whole WEkEO Catalogue, including subsetting and downloading functionalities:
hda Python package
You can use a dedicated Python Client distributed via the hda package:
REST API
You can use directly the HDA REST API by sending https requests with your favorite tools:
What's next?
If you have trouble to download data from the Copernicus Marine service, please check this article: How to get Copernicus Marine Data hosted on WEkEO?
Feel free to check these articles that 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 our contact webpage
via e-mail to our support team (supportATwekeo.eu)