Etudes

Articles

• Changement climatique
  16 mai 2022, par alexis.martin-comte@visioterra.fr

  VisioTerra

• Estimation of the quality of Copernicus DEMs
  26 septembre 2020, par contact@digeetal.com

  ESA
  Analysis of the three Copernicus Digital Elevation Models (DEMs) (EEA-10, GLO-30 and GLO-90). Comparison of GLO-30 with the other global DEMs SRTM, ASTER GDEM and ALOS World 3D. Altimeter accuracy computed from LiDAR ICESat-1, ICESat-2 ("Terrain only" and "Terrain with canopy") and GEDI ("Lowest mode" and "Highest return") data. Statistical measure of the influence of land (...)

• Galerie SPOT World Heritage
  26 septembre 2020, par contact@digeetal.com

  CNES
  Integration of the free SPOT-123/4/5 image catalog in VtWeb. Development of pseudo "natural colors" rendering functions. Production of a gallery of views.

• Study of deforestation in three Forest Reserves in Ghana
  25 novembre 2019, par contact@digeetal.com

  Tropenbos International
  Analysis of forest degradation since 2000 in favour of cocoa agroforestry in the forest reserves (excluding admitted farms) of Tano-Ofin, Sui-River and Krokosua using radar and optical images.

• REMA Biodiversity Information System (RBIS)
  14 mars 2020, par contact@digeetal.com

  REMA / World Bank
  Rwanda Environment Management Authority (REMA) - Supervision of the RBIS project from the tender to the development of the software, the organization of the data and the different trainings.

• Study « Live-link to ESA Big Data »
  14 mars 2020, par contact@digeetal.com

  ESA
  Investigation of the volume and accessibility of ESA’s major EO archives. Developed a prototype to access and process -DHuS Sentinel-1, -Envisat ASAR/MERIS, -Landsat-5/7 TM/ETM+ collections on the fly.

• Geological analysis in the Tindouf Basin
  14 mars 2020, par contact@digeetal.com

  Beicip Franlab / SONATRACH
  Supply and processing of images (radar and optical) on the Tindouf Basin (Algeria). Production of geological photo-interpretation maps.

• Radar / optical coupling
  14 mars 2020, par contact@digeetal.com

  TOTAL
  Development and qualification of methods for recovering the optical signature of hydrocarbons from slicks detected by radar.

• Studies
  24 décembre 2019, par contact@digeetal.com

  Product evaluation allows space agencies to assess the quality of a product with respect to external references, to compare products between them and to quantify the suitability for use for different applications. The study carried out for ESA consisted of evaluating the accuracy of the heights provided by the SRTM, ASTER GDEM, ALOS World 3D and Copernicus DEMs DTMs compared to the ICESat LiDAR data. The DTMs were compared to each other by calculating the difference between two DTMs on the (...)

• Analyse géologique dans le Bassin de Tindouf
  14 mars 2020, par contact@digeetal.com

  Beicip Franlab / SONATRACH
  Fourniture et traitement d’images (radar et optique) sur le Bassin de Tindouf (Algérie). Productions de cartes de photo-interprétation géologique.

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