Water Level Monitoring Reservoir

Every now and then, water reservoirs fill up and lots of water are spilled, surprising the downstream inhabitants with very sudden and unexpected floods. This is a relatively common phenomenon. Therefore, in the TWIGA project, we decided to start designing a service that determines how full the reservoirs are based on satellite imagery. We estimate […]


An important advantage of digitalization and remote sensing, in particular, is that it facilitates informed decision-making, can serve as an instrument for empowerment (increased transparency), and supports inclusiveness. But how is this put into practice and take existing power relations into account? Especially in the context of tackling poverty, many factors play a role and […]

Monitoring country-wide atmospheric water vapor in Uganda

The first TWIGA cost-effective GNSS stations were successfully deployed in Uganda in November 2019 by GReD, PoliMi, and TU Delft. Since then, they have collected raw GNSS data to monitor the amount of atmospheric water vapor, for meteorological applications. The stations were deployed nearby Kampala, forming a dense mesh capable of detecting spatial variations of […]

Connecting TWIGA to the GEOSS initiative

Climate and weather, with a high degree of spatial and temporal variability, can adversely affect crop yields, cattle production, and the availability of freshwater. The production of food is at the forefront of climate change and population growth impacts as the ecosystems on which it relies are increasingly degraded and the availability of suitable land […]

How hot is the soil?

The Surface Energy Budget While the sun is beating down on the Earth’s surface, it is generating fluxes of energy that play an important role in determining our weather and climate. In a way, it functions as a gigantic solar panel that absorbs solar radiation. The absorbed energy can be either emitted back to the […]

TWIGA Disdro Network: How is it going in Kenya

My last blog was on how we developed Kenya’s disdro network, how the sensors work and how we transmit its data. The network with the new generation of the disdro sensors has now been running continuously for 6 months. We are now shifting focus on keeping the network active and, more importantly, share and display […]


Most geodata applications for food security are still in the pilot stage. Geodata specialists tend to look to general digitalization initiatives for inspiration. The idea is to learn from them as they started earlier and are supposedly more advanced. Is this true? Apparently not, if you look at the latest World Bank report on digital […]


There is quite some interest in geodata applications for inclusive finance for smallholder farmers. The idea is that financial institutions can make their operations more effective and more efficient. Geodata companies are looking for a combination of new markets and solving societal problems. Applications are credit scoring, assessment of repayment rate and time, geo-location of […]

Using the South African GNSS network to monitor country-wide atmospheric water vapour

The South African GNSS network (TrigNet, website) counts 64 stations distributed all over the country, with inter-station distances ranging from 80 km to 300 km. The network provides users with data for both real-time and post-processing applications. An example of real-time service is the provision of RTK corrections to augment the positioning precision of the […]