Maps that drive your decisions
Studies, maps and databases produced in France and West Africa since 2018: self-employed since April 2026, previously as an employee, intern or research fellow.
- 2018-2019
First GPS field surveys: the 7 bus lines of Saint-Louis, Senegal, as an intern at Géomatica.
- 2022-2023
Humanitarian mapping projects for HOT, on Tasking Manager and MapSwipe.
- 2023
Co-author of two chapters in a book published by Springer.
- April 2026
Bernis pilot study: 13 public car parks and 361 spaces checked against the flood risk prevention plan.
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Local Government
UGB campus map: from drone imagery to an offline map
Finding a lecture hall, a faculty or a residence block on the Gaston Berger University campus is hard for a new student. The campus was covered in 3,199 aerial photos, stitched with OpenDroneMap into a 3 cm per pixel orthophoto processed in 15 aligned sectors. Every feature was then digitised in QGIS: 257 buildings, 17 residence villages, the roads and 30.0 km of footpaths. The 150 places are named and classified, and 107 have their entrances mapped, so walking directions lead to the right door, with voice guidance. The map is published as a lightweight web app that installs on a phone and works offline after a first visit.
Local Government
Pilot Study — Public Parking Exposure to Flood Risk
Self-produced pilot study by DialloGeo demonstrating a reproducible GIS methodology to analyse flood risk exposure of public parking areas. Test case: municipality of Bernis (Gard, southern France, 3,425 inhabitants), located in the alluvial plain of the Vistre river basin. Five-phase methodology: - Open data acquisition: IGN Admin Express COG (administrative boundaries), RGE ALTI 1 m DEM, Vistre Flood Prevention Plan (PPRi) from DDTM 30, OpenStreetMap (Overpass API) - GIS preparation: harmonisation in EPSG:2154 (Lambert-93), virtual raster mosaic, DEM clipping, PPRi spatial filtering - Parking inventory: OSM extraction + systematic photo-interpretation on IGN BDORTHO 20 cm aerial imagery + Mapillary validation - Spatial analysis: parking × PPRi spatial join, NGF elevation extraction from DEM, automated three-class classification - Deliverables: A3 portrait map with town centre inset, action sheet for the most exposed parking, enriched GIS layer, reproducible QGIS project Key findings on Bernis: - 13 public parkings identified (4 from OSM + 9 from photo-interpretation) - 361 parking spaces over 12,948 m² of public parking surface - 97% of spaces located within PPRi flood hazard zones - 22% in high hazard zone (4 floodable parkings) - Only 3% in confirmed refuge zone Tools used: QGIS 3.44 — GDAL — Python pyproj — IGN Géoplateforme — Mapillary Data sources: IGN (Admin Express, RGE ALTI 1m DEM, BDORTHO orthophotos), DDTM 30 (Vistre PPRi flood hazard zoning), OpenStreetMap contributors (ODbL).
FTTH
Field Feasibility Studies — Telecom Network Saône-et-Loire / Ain
Field mission for Cert-Énergie: 12 feasibility studies on telecom and electrical network infrastructure across 11 municipalities in Saône-et-Loire (71) and Ain (01), France. Varied interventions: pole displacement and replacement, FT/FO bracket and crossarm removal, network connections, SYDESL public lighting survey, Enedis low-voltage reinforcement. Optimized field tour completed in 48 hours (2 days, ~700 km). 11 technical reports delivered with georeferenced photo protocol (6+ photos per pole, active network identification, access measurements, constraints analysis). Work ordered by: Orange, SYDESL, Enedis, EPF Ain.
FTTH
FTTx Deployment — Serfim T.I.C
Full cartographic production for fiber optic (FTTx) deployment in the Haut-Doubs region, France. Splice plans (BPE), cable dimensioning, field quality control, and PostgreSQL/PostGIS database updates using IPON, Geofibre and NetGeo platforms. Over 6 months of continuous production with deliverables meeting operator specifications.
Research
Springer Publication — YouthMappers & SDGs
Co-author of Chapter 6 "Cross-Continental YouthMappers Action to Fight Schistosomiasis Transmission in Senegal" published by Springer (2023). Cross-continental collaboration within the MASTR-SLS project (Politecnico di Milano) between Italy, Senegal (UGB YouthMappers), and AIMS (M'Bour) to map schistosomiasis risk areas in the Senegal River valley. Field data collection, OSM mapping of vulnerable villages, and multispectral drone imagery to identify vector habitats. SDGs 3 (health) and 6 (water).
Humanitarian
Cartographic Projects — HOT
Creation and management of humanitarian mapping projects via Tasking Manager and MapSwipe for HOT's West Africa hub. Quality validation of OpenStreetMap contributions using JOSM, FR↔EN technical documentation translation, and coordination with local volunteer mapping communities.
Research
SIRENA Database — IRD / LEIDI
Administration of the SIRENA server, a participatory GIS for the Senegal River delta hosted at Gaston Berger University. PostgreSQL database restoration, bilingual metadata cataloging (FR/EN), and thematic map production for IRD and LEIDI laboratory scientific publications.
Local Government
Urban Transport Mapping — Saint-Louis
GPS field surveys on the 7 bus lines of Saint-Louis, Senegal: route mapping, stops and terminus recording. Production of 7 individual line maps and a synoptic map of the complete network. Deliverables used by the local authority for urban transport planning.
Humanitarian
Collaborative Health GIS — ENDA Santé & SKBo Zone
Design of Survey 123 forms for georeferenced health data field collection. Implementation of a collaborative GIS on ArcGIS Online, enabling institutional partners (NGOs, Ministry of Health, local authorities) to centralize and visualize their data in real time. Health district mapping in the SKBo cross-border zone spanning three countries: Mali (Sikasso), Burkina Faso (Hauts-Bassins, Cascades), and Côte d'Ivoire (Korhogo, Ferkessédougou). Production of approximately 15 maps for district delineation and health facility locations.
Humanitarian
Healthsites.io — Health Facilities
GPS and ODK Collect field survey of all health facilities in the Saint-Louis department (health posts, health centers, hospitals, pharmacies). Pilot project conducted with CartONG and OSM Senegal to feed the global Healthsites.io platform. Data cleaning, geocoding, and integration into OpenStreetMap. Results documented by CartONG and Healthsites.io.
Humanitarian
Mapathons & Training — CartONG / YouthMappers
Facilitation of Missing Maps mapathons with CartONG and Montpel'Libre: logistics coordination, participant training on JOSM and iD Editor, contribution validation. Founding president of the YouthMappers club at Gaston Berger University: recruitment, student training in OSM and QGIS, and organizing participatory mapping events.
Humanitarian
Healthcare Accessibility — Kolda Region
Spatial analysis of healthcare accessibility in the Kolda region (Casamance, southern Senegal). Production of 5 thematic maps: buffer zones by distance to health centers (<1km to >10km), road accessibility, multi-criteria synthesis, and zooms on critical areas. Identification of medical deserts in this rural area bordering Gambia and Guinea-Bissau.
Local Government
2019 Presidential Elections — Senegalese Diaspora
Mapping of the 2019 Senegalese presidential election results for the global diaspora. Production of 8 regional maps combining choropleth (votes cast by country) and proportional pie charts (vote distribution by candidate). Official CENA data covering Africa, Europe, the Americas, and Asia.
Local Government
Additional Cartographic Projects
Municipal and thematic maps produced in Senegal: administrative plans for Bambey, Oussouye, Malika, Cité Niakh, and Guédiawaye department with public facility inventory (health, education, markets) and road networks. National administrative divisions of Senegal (14 regions). Mapping of an agroecological farm in Gandon/Fass Ngom with water resources and land use.
Demonstrations on open data
These are not client assignments: I built them on public data to show consultancies how I work as a subcontractor. Each demonstration has its own page and a PDF sheet (in French).
Demonstration on open data
GIS atlas of a sewer network to the RAEPA data standard
Open-data sewer network restructured to the RAEPA standard and checked in 6 points: 57 inconsistent flow directions, 244 missing attributes. A3 atlas sheet.
Demonstration on open data
Local zoning plan of a Haut-Doubs municipality: CNIG standard and compliance check
Zoning of a French local plan read from the national portal, styled with the official CNIG styles and checked against the standard in 13 points.
Demonstration on open data
Environmental baseline map for an impact assessment, around a fictitious site
Natural and heritage designations within 2 and 10 km study areas around a fictitious project site, all sources reusable commercially.
Organisations I have worked with
Employers, internships and programmes, before DialloGeo was set up in April 2026. They are not clients.
- Serfim T.I.CFibre optic mapping technician, employed through LIP · 2025-2026
- Humanitarian OpenStreetMap Team (HOT)Cartographic project manager (Impact Partnership Intern) · 2022-2023
- ENDA SantéGIS specialist, Dakar · 2022
- YouthMappers / Arizona State UniversityResearch Fellow and West Africa regional ambassador · 2019-2022
- IRD / LEIDI laboratory, Gaston Berger UniversityGIS specialist, Saint-Louis · 2019
- GéomaticaGIS intern, Saint-Louis · 2018-2019
- CartONGMissing Maps mapathons, Healthsites.io surveys with OSM Senegal
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