Comparator of the coast of Catalonia | icgc

Comparator of the coast of Catalonia

Comparison of orthoimages generated from aerial photographs captured both before and after temporal images

The Catalan Coast Comparison Viewer allows the comparison of orthoimages generated from aerial photographs taken before and after storms that have affected the coast, either totally or partially, with the aim of facilitating the assessment of the damage caused.

The viewer is part of the Coastal Dynamics Information Service (SIDL) project, promoted by the Department of Climate Action, Food and Rural Agenda and funded by the Fons Climàtic, with the supervision of the Interdepartmental Commission on Climate Change and technical assistance from the Climate Fund Commission.

Allows users to observe the consequences of sea storms on the Catalan coast, especially the geomorphological effects, and facilitates the assessment of the damage caused by adverse weather events. The application offers an interactive interface that allows users to simultaneously view pre- and post-storm images and facilitates the identification of affected areas, with tools for navigation and detailed exploration of the areas of interest.

The viewer is aimed at land managers, urban planners, researchers, and policymakers who need accurate data for decision-making on coastal management and climate change adaptation. It is also useful for citizens interested in understanding the impact of storm surges on coastal areas.

Covers the entire coast of Catalonia.

 

Viewer

Full screen viewer

 

Formats, visualizations and interactive features

The application offers an interactive interface that allows users to simultaneously view pre- and post-storm images and facilitates the identification of affected areas. In addition, the viewer includes navigation and zoom tools, which allow for detailed exploration of areas of interest.

On the right of the viewer, once the storm to be viewed has been selected, the user can choose a municipality from a list to focus the viewer's view. The list only shows those municipalities that are totally or partially covered by the orthophoto of the storm in question.

The viewer provides access to a collection of historical and recent orthoimages of the Catalan coastline, the vast majority of which are from after storms.

The application allows the following images to be viewed and compared:

  • Ortophoto 2023: Latest conventional orthophoto published by the ICGC. Pixel size 25 cm.
  • January 2017 storm: Orthophoto made from aerial photographs of the entire coastline of Catalonia, captured on January 24 to assess the effects of the storm of January 21 and 22, 2017. Pixel size 25 cm.
  • March 2018 storm: Orthophoto made from aerial photographs of the areas affected by the storm of March 1 and 2, 2018. The Badalona-Roses section was flown on March 6 while the Cap de Creus section on March 16. Pixel size 25 cm.
  • February 2019 Coast: Orthophoto made from aerial photographs of the entire coastline of Catalonia, captured in February with a pixel size of 15 cm.
  • April 2019 storm: Orthophoto made from aerial photographs of the areas affected by the storm of April 19 and 23, 2019. The Ampolla-Blanes section was flown on April 26 while the Blanes-Roses section was flown on May 4. Pixel size 15 cm.
  • October 2019 storm: Orthophoto made from aerial photographs of the areas affected by the storm of October 22 to 24, 2019. The orthophoto includes the Cambrils to Sitges section and the Badalona to Sant Pere Pescador section flown on October 27. Pixel size 25 cm.
  • December 2019 storm: Orthophoto made from aerial photographs of the areas affected by the storm of December 4 and 5, 2019. The Castelldefels-Roses section was flown on December 7 while the Delta de l'Ebre-el Vendrell section on December 10. Pixel size 10 cm.
  • Ebro Delta January 16, 2020 (Satellite): Orthophoto made from satellite image captured on January 16 with the ESA Sentinel-2 satellite. Pixel size 10 m.
  • Ebro Delta January 23, 2020 (Satellite): Orthophoto made from satellite image captured on January 23 with the ESA Sentinel-2 satellite. Pixel size 10 m.
  • Delta de l'Ebre 26 January 2020 (Satellite): Orthophoto taken from satellite image captured on 26 January with the ESA Sentinel-2 satellite. Pixel size 10 m.
  • Storm Gloria: Orthophoto taken from aerial photographs of the areas affected by storm Gloria.
    - Delta de l'Ebre, 24 January 2020 with pixel size 15 cm.
    - Delta de l'Ebre - Tordera, 26 January 2020 with pixel size 10 cm.
    - Tordera - Cap de Creus, 27 January 2020 with pixel size 10 cm.
  • Delta de l'Ebre 21 February 2020: Orthophoto taken from aerial photographs of the Delta de l'Ebre one month after storm Gloria. Flown on February 21 with a pixel size of 10 cm.
  • Storm Filomena, Delta de l'Ebre January 12, 2021: Orthophoto made from aerial photographs of the areas affected by storm Filomena. Delta de l'Ebre, January 12, 2021 with a pixel size of 15 cm.
  • Montsià impacts September 2021: Orthophoto made from aerial photographs of the areas affected by the floods of the Montsià streams. Images captured on September 3, 2021. The area near the coast between Alcanar and Sant Carles de la Ràpita has a pixel size of 5 cm while the rest has a pixel size of 15 cm and has partial cloud cover.
  • Storm Celia, March 2022: Orthophoto made from aerial photographs of the areas affected by storm Celia. Maresme Nord and Barcelona flight of April 4, 2022, Baix Llobregat, Tarragonès and Delta de l’Ebre flight of April 8, 2022 with a pixel size of 10 cm.
  • Storm Isaak, February 2023: Orthophotos made from images of the Pléiades Neo satellite of the areas most affected by storm Isaak. Barra del Trabucador of February 12, Badalona of February 13, 2023 and Tarragona-Calafell of February 14, 2023, all with a pixel size of 30 cm.
  • DANA of September 2-3, 2023: Orthophoto made from aerial photographs of the areas affected by Dana, flight of September 6, 2023 with a pixel size of 10 cm.
  • Storm Nelson, March 27-31, 2024: Orthophoto made from aerial photographs of the areas affected by Storm Nelson, flights carried out on April 3, 5 and 6, 2024 with a pixel size of 10 cm.