Lieven Slenders

Lieven joined Gather in 2019. He oversees a growing, global team of GIS Data Scientists leading on the development of tools and insight for municipal organisations in Madagascar. In 2021 Lieven was included in GeoWorld’s 50 global geospatial rising stars.


Lessons from using geospatial data to improve sanitation for vulnerable communities in Antananarivo, Madagascar
Lieven Slenders

In this presentation Lieven Slenders – Geospatial Manager at Gather – will introduce the methodology, outcomes, and lessons from Gather’s partnership with the municipal sanitation company in Antananarivo, the capital of Madagascar.

In 2020 we formed a unique partnership with sanitation organisations in Antananarivo, Madagascar to use geospatial data to improve sanitation infrastructure and services for 1.7 million people. Madagascar ranks 172nd for sanitation provision out of 180 countries. The first phase of our partnership has laid the groundwork for the first city-wide geospatial baseline. Together – led by the municipality - we have pioneered a new geospatial index and platform to allow organisations to collect, share and analyse standardised sanitation data. These tools have been tested in the fifth arrondissement, home to 350,000 people.

1. Lieven will introduce the technical specification for the tools
2. Lieven will share our principles for improving the integrity of location data
3. Lieven will share the challenges, successes, and lessons from the partnership, opening a conversation on steps to success for partnerships that use geospatial data to recentre data to the Global South and advance the sustainable development goals

Use Cases and Applications