14 rue Albert Einstein
77420 Champs-sur-Marne

Contact person

Serge Riazanoff
Tel +33 9 6130 6628
Fax +33 1 6462 0897
cell +33 6 0784 8456


VisioTerra has developed a powerful client-server solution called VtWeb (see the demonstration platform that enables:

  • accessing a wide range of EO (Earth Observation) products, meteorological, climate and biogeophysical data,
  • display these data geocoding them on-the-fly in 2D web mapping or 3D virtual globe within usual Web browser without any extra plugins,
  • process these data on-the-fly through default, predefined or user-defined styles (colour composition, histogram transforms, filtering, pseudo-colour),
  • share the view with hyperlooks enabling other users to see a particular product using the specified on-the-fly processing parameters and the desired point of view,
  • export the processed image in GeoTIFF (geocoded tagged image file format) or KML (Keyhole Markup Language).


This activity will implement VTWeb for PROBA-V with two main objectives:

  • detect changes in the “S1 TOA” (one-day synthesis Top Of Atmosphere),
  • enable users to display the origin image, its change with a rolling mean and the rolling statistics together with contemporaneous meteorological data.

Among all the products available (see, “S1 TOA 100m” products have been chosen because they are the ones available in the shortest time of their acquisition and with the best spatial resolution. Aim of a future operational service will be to enable users to be warned when a substantial change occur within their area of interest and therefore the delay since the observation time shall be as reduced as possible.

Technical contact person

Kévin Gross
Project Manager
Tel +33 9 6130 6628