+248 432 5806 info@seyccat.org


Type: Medium

SeyCCAT strategic objective: 1

Lead Project Partner: Jonathan Pinchart


  1. Ministry of Agriculture, Climate Change and Environment (MACCE)
    Coastal Adaptation Management Section / Climate Science and Data Management Section
  2. Ministry of Land and Housing, Center for GIS
  3. National Institute of Science, Technology and Innovation


Jonathan Pinchart, head of a project to map the coastline of the Seychelles using drone and GIS technology, waits for the team’s drone to land after a mapping session at Beau Vallon beach on the main island of Mahé on 7 December 2021.

Seychelles is renowned for its sandy beaches, which forms an essential component of the appeal of the islands for tourism, the most important economic sector in terms of revenue, employment and source of foreign exchange. Beaches form an integral part of the way of life of the inhabitants and they are essential for resilience, economic development, livelihoods of coastal communities but many are under threat from coastal erosion. Having accurate data on coastal processes is vital to guide coastal development and environmental management. In the Seychelles context, data that can be used for such purposes is limited in availability and extent. Collecting data at a frequency relevant to dynamic adaptive management of the coastal zone is a complex, time-consuming, physically restrictive and costly affair for any small country. For example, the last aerial imagery exercise conducted for Seychelles was in 2011. Although this geospatial information is of sufficient quality, it represents an outdated image of the quickly eroding coastal zones and rarely allows for high-standard analyses.

This project is in direct response to the recommendation and priorities of the recent Coastal Management Plan in which the strengthening of coastal monitoring was highlighted. The aim is to develop a useful and operational coastal monitoring tool integrating UAV, GNSS technology and structure-from-motion techniques; to provide a cost-effective solution for a rapid airborne sampling of the coastal zone at high accuracy and very high spatial resolution. The data collected will be used to assess changes in shoreline, topography, volumes, and extent of beach morphology using photogrammetry. This methodology has not yet been used in Seychelles and will potentially revolutionize the forthcoming coastal zone monitoring. UAV photogrammetry technology has the characteristics of low cost, high efficiency, portability, and high precision in obtaining spatial three-dimensional information, and has also been proven to be suitable for high-precision mapping and monitoring of topographic and geomorphological changes in coastal zones. The project will be implemented on the island of Mahe, at four specific sites namely North East Point, Beau Vallon, Anse La Mouche and Baie Lazare, which were highlighted in the CMP as priority sites. The study area will focus on the shore and consists of a coastal buffer zone from the emerged beach itself (low watermark to duneland) to an extent of 25-40 meters inland.

The project will be a joint effort between Geomer Consulting and the Ministry of Agriculture, Climate Change and Environment, (CAMS / CSDM), MLH (Center for GIS) and NISTI. The proposed project will highly enhance CAMS ability to understand critical coastal processes and guide potential coastal interventions. It will address a current major gap as very few monitoring activities are actually in place and/or are not consistent. The project will enable the acquisition of quantitative data on sites where aerial and morphodynamic measurements were very rare or non-existent. It will also develop the potential for further collaborations with partners in the field of high-resolution 2D/3D mapping technologies with the integration of other technologies. The end-results datasets of the project will remain in the public domain and will be hosted on CSDM, MLH-geodatabase as well as being accessible to all through the National Knowledge Engagement Management Platform being developed by NISTI. The direct beneficiaries of the project will be the national authorities tasked with coastal management, land use and risk-alleviation, as well as researchers and concerned citizens.

The project will be addressing SeyCCAT’s strategic objective 1, which is to Support new and existing marine and coastal protected areas and sustainable use zones by contributing to baseline studies and monitoring tools for management, developing knowledge to understand coastal processes, improving the decision making process by collecting critical data, studying the potential effects of climate change, to name a few. The activities will also actively contribute towards the implementation of the CMP and other national policies as well as alleviate constraints in the coastal monitoring domain.

The overall outcome of the project is to improve the management of coastal zones and informed decision-making processes on Mahé Island through innovative, improved and efficient coastal monitoring, data analyses and data sharing to enable better planning and the prevention or mitigation of coastal erosion. The project will be implemented within a 24-month period with data being collected on a quarterly basis.

SeyCCAT funds:  SCR 999,955.00


For this project, there is an expected co-financing of SCR 1,250,950.00 from Geomer Consulting; covering vehicles, GNSS equipment (RTK-DGPS), Total Station, Structure-from-Motion photogrammetry software, equipment and other analysis software.

Duration: 24 months

Project Application Form: Coming soon