Mobile version


What the Opendap can do?

Opendap handles transport, translation and subsetting of data. Opendap allows you to access remote data over the internet:

  • using familiar data analysis and visualization packages like Matlab, Ferret, IDL,... as if the data were on your computer
  • without worrying about data storage formats, translating them on-the-flight (including in ascii), if necessary
  • accessing only the data of interest (extracting geographical area, time series...).

How to use the Opendap ?

Since August 2010, an authentication is required to access all the Ssalto/Duacs data (see <link en news-storage news-detail external-link-new-window>Upgrade and modifications on the Opendap and Extraction Tool, 2010/08/26). If you are not registered and want to access those services (NB. for scientifc uses only), we request you to fill in the online form. Then, an individual hostname and a password will be sent.

For example, to use Ssalto/Duacs merged near-real time sea level anomaly data (merged NRT-MSLA) with Ferret software :

  • launch Ferret
  • type : use ""  (see Aviso Opendap for another data http addresses)
  • then "show data" shows the file characteristics.

Sea Level Anomalies are in "sla". This grid includes all available msla_merged_h data from the beginning. "show grid sla" returns number of points, beginning and end value, in longitude, latitude and time. sla can be used as a local data source; network access are completely transparents, and concern only selected data.
For more information, look at an exemple of command lines and of maps in a Lively Data: Direct access to the data behind the LAS

You thus can plot a map, a longitude-time diagram, etc. What can be done with Ferret is also possible with other "client" software like ncBrowse, IDL, Matlab... (see OpenDap website for the complete software list)

Have a look at Aviso Opendap products


Rss feedsContactPartnersFAQLexiconMobile
You must enable cookies in your browser preferences to save the modifications
You are using an older version of Internet Explorer, please update to take full advantage of Aviso+ features

Customize the home page

View all widgets
Reduce display
Public profile
User profile

Select/Deselect widgets

Discover AVISO+

Customizable home, reading tools, products search guide, etc.. Discover step by step the features of the new site AVISO+.

Customizable homepage

The new home page is composed of blocks called "widgets".

Rearrange the blocks with a "Click & Drop".

Hide a widget with the cross at the top right. Reset or add a widget with the "wrench" icon. The "User" and "Public" profiles offer a predefined organization.

All the modifications are automatically saved as cookies on your machine so as to enable you to have your own specific AVISO+.

Reading tools

Ease your reading by choosing the page background colour (black/white) and/or by modifying the font size.

Browsing menu and breadcrum trail

To ease your browsing through AVISO+, you can use at any time the main banner items with the interactive submenus or use the browsing menu on the left side of the screen (it is open by default). For more readiness of the page contents, you can fold and unfold the browsing menu by clicking on the tab. At any time you can know where you are thanks to the browsing menu or the breadcrum at the top of the page.

Products search guide

The first submenu of the "Data" banner item leads you to a new search form enabling you to find quickier the product that suits your needs. The list of results is updated according to your selection criteria.

AVISO+ Multimedia

The first submenu of the "Multimedia" banner item leads you to AVISO+ collections of images and videos linked to altimetry and its applications. Have a nice visit!