Freelancer profile translated to English.
Back to original languageAbout Sébastien
Your organization has geographic data but lacks the tools to analyze, visualize, or transform it into operational decisions. Are you looking for ageomatics expert capable of structuring, analyzing, and mapping your data?
I am **Sébastien Wamster**, a Geomatics Expert & Cartographer with over 10 years of experience.
I help companies, local authorities, and organizations createstatic or interactive maps, spatial analyses, and custom GIS toolstailored to their technical, territorial, and strategic challenges.
My role: to make your data **understandable, actionable, and visually impactful**, from scoping to final delivery.
Data Mapping & Visualization
- Static & interactive maps
- Geographic dataviz & dashboards
- Professional map styling
- Creation of atlases, plans, thematic maps
- High-quality web & print export
GIS & Spatial Analysis
- Territorial studies & multi-criteria analysis
- Spatial modeling, buffers, clusters, accessibility calculations
- Cross-referencing socio-economic, environmental, and technical data
- Processing & quality improvement of geo-databases
- Remote sensing & satellite imagery
- Risk, mobility, energy, urban planning, biodiversity analysis
Custom Tools & Automation
- Development of custom GIS tools
- Python / PyQGIS scripts / workflow automation / GeoAI
- Webmapping (Mapbox, Maplibre, OpenLayers, Leaflet)
- PostgreSQL/PostGIS databases
- API integration & interactive mapping applications
Support
- Scoping & understanding
- Data collection, structuring & processing
- Technical choices & implementation of appropriate tools
- Production, distribution & documentation
- Occasional intervention or long-term mission
Objective:transform your geographic data into clear decisions, reliable tools, and impactful maps.
Let's discuss!
🌐 okoe.fr
French
Native or bilingual
English
Native or bilingual
German
Fluent
Can work on-site
Paris (up to 50km), Lyon (up to 50km), Toulouse (up to 50km), Strasbourg (up to 50km), Nantes (up to 50km)
Experience
- Bricelière Conseil
On Malt
Open data integrationREAL ESTATEJanuary 2026 - February 2026 (1 month)Integration of open geospatial data into a PostgreSQL/PostGIS database for Omny. Processing of multiple sources (education, transport, health, commerce, environment, natural risks) and development of automated Python scripts for data updates and proximity calculations between real estate properties and points of interest. - ExpertiseFranceInnovate with EU Space DataJune 2025 - December 2025 (6 months)Digital knowledge hub for space and terrestrial observation, funded by the EU and implemented by Expertise France.Member of the expert pool for the 'Innovate with EU Space Data' program, supporting selected companies in integrating Copernicus spatial data.
- Ferme SolaireInteractive Mapping DevelopmentENERGY AND UTILITIESMarch 2025 - October 2025 (7 months)1. Interactive mapping for the Solar Farm homepage:2. Creation of an internal mapping application divided into 12 themes using APIs and databases to analyze the relevance of cadastral plots per project.
Reviews
O
Olivier
Spécialiste Data géographique - Bricelière Conseil
Reviewed on 3/16/2026
Sébastien worked on a project to enrich open data real estate information for our platform. The scope was significant: ingestion of public datasets related to municipalities and neighborhoods, cleaning, normalization, and then correlation with our own business data.
He quickly understood our challenges, proposed a structured workflow, and delivered work of impeccable quality. The data is clean, well-documented, and perfectly usable in production.
Beyond the technical skills, Sébastien is an excellent communicator: responsive, transparent about progress, and proactive when he identifies areas for improvement. This is exactly the type of profile you want to work with again. I recommend him without the slightest hesitation.
Ilham
FNSCHLM
Reviewed on 9/7/2023
The mission with Sébastien went perfectly, he is very attentive and his work is meticulous.
Recommendations
FU
FU
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Education
- Master 2 Geomatics, applied to Urban Studies and RisksUniversité de Cergy Pontoise2014
- Master 1 Urban Planning, Territorial Development and SustainabilityUniversité Paris Ouest Nanterre la Défense2013