Coastline monitored by satellite
LITTOSAT will contribute to the knowledge and monitoring of the state of foreshore habitats (part of the coastline periodically covered by the tide) and shallow waters, by providing new satellite products on coastal habitats (image mosaics and maps of biocenoses). These satellite products will be available:
- systematically at regional scales, with a seasonal update frequency and at a spatial resolution of 10 metres, called high spatial resolution (HSR);
- on user request over areas of particular interest and at key periods, at spatial resolutions of the order of a metre, called very high spatial resolution (VHSR)
All these satellite products will be referenced in the catalogues of the regional Spatial Data Infrastructures (SDI) and also easily accessible through a light, simple, intuitive and open source web visualisation application called Littoviz. In this way the regional satellite products and tools developed by LITTOSAT will be easily replicable in other regions, and available in accordance with the European INSPIRE Directive.
Overview of the Littoviz visualisation application to display and compare satellite products from the LITTOSAT project. ©Hytech imaging, contient des données Copernicus Sentinel-2 (2020) modifiées.
In user-defined areas of interest, LITTOSAT will provide change detection tools to monitor the impact of climate change and human activities on habitats of interest, such as seagrass beds, algal belts on rocky flats, or the proliferation of invasive species.
In order to facilitate the appropriation and adoption of the products and tools by users, the LITTOSAT project will offer resources(documentation, tutorials) and support (webinar, training) for the agents of the partner services (Regional Nature Park of Armorique, French Biodiversity Office, departmental directorate of territories, etc.).
LITTOSAT will thus contribute to the following two issues: how to assess the impact of climate change and human activities on coastal intertidal and shallow water habitats, and how to evaluate public policies aimed at protecting biodiversity in these areas?
TERRITORY FOR EXPERIMENTATION
- Mapping of existing habitats (sea grass beds, rocky flats, algal belts)
- Regulatory Anchorage Areas
RESULTS - FINAL PRODUCTS
- Regularly updated satellite products giving access to new information on intertidal and shallow water habitats, homogeneously over the regional coastal territory, thanks to Sentinel-2 images (seasonal regional mosaics, bottom reflectance, terrestrial and submarine vegetation indices, maps of seagrass beds and algal belts); and in a punctual manner over sensitive areas (Natura 2000 sites, marine protected areas) thanks to the very high-resolution commercial data of the Planet constellation. The products may be supplemented locally by Pleiades data when very high resolution is required at key periods.
- Distribution services for these satellite products in standard Open Geospatial Consortium (OGC) formats, and therefore interoperable with existing land management tools, and compliant with the INSPIRE directive.
- Change detection tools for areas of interest, making it possible to cross-reference satellite data with climatic data and socio-economic data provided by the end users (management areas such as regulatory anchorage zones, intervention zones to combat the proliferation of invasive species, habitat protection zones of interest such as seagrass beds). According to the observatory of needs set up as part of the Regional Copernicus initiative (GIS BreTel), the cross-referencing of satellite data and business data is essential for users to appropriate the satellite data.
- A web-based visualisation platform to disseminate the results to other potential end-users, based on a fully open-source tool, duplicable and already used in other regions.
- Regional Copernicus (GIS BreTel, FPA Caroline Herschel)
- Mareos (MARitime Earth Observation Services), Evaluation of the interest of Copernicus data for the monitoring of indicators in the framework of the implementation of the Marine Strategy Framework Directive (MSFD); Pôle Mer Bretagne Atlantique / BRGM).
- Littoviz Marine Natural Park of the Gulf of Lion