Tanzania's agricultural sector employs approximately 65% of the working population and generates 28% of GDP, yet it operates with remarkably little spatial intelligence. Most smallholder farmers make planting, irrigation, and fertilizer decisions based on experience and observation rather than data. Agricultural extension officers serve districts of hundreds of thousands of hectares with limited tools and vehicles.
The Resolution Gap
Free satellite imagery — Sentinel-2 at 10m resolution, Landsat at 30m — provides a broad-brush view of agricultural landscapes useful for national monitoring programs. But 10m resolution cannot distinguish between healthy and stressed crops at the field level, cannot identify irrigation system failures, and cannot detect the early signs of disease or pest outbreak that would enable timely intervention.
UAV multispectral surveys at 5–10cm GSD resolution reveal what satellite imagery cannot. Individual plants are distinguishable. Irrigation boundaries are precisely mapped. Nutrient deficiency patterns — which manifest as subtle color variations invisible at satellite resolution — are clearly identifiable. The temporal flexibility of UAV surveys allows campaigns at critical crop growth stages that may not coincide with satellite passes.
- NDVI variation at the individual plant level — identifying stress before it becomes visible to the human eye
- Irrigation system mapping and efficiency assessment — identifying over- and under-irrigated zones
- Soil type and composition proxies from spectral analysis
- Weed and pest pressure mapping for targeted intervention
- Soil erosion and land degradation assessment
- Crop counting and yield estimation at field level
The Ministry of Agriculture Program
In 2023–2024, TANGIS conducted multispectral UAV surveys across 1.2 million hectares of priority agricultural land in the Arusha and Mwanza regions for the Ministry of Agriculture, integrating the results with satellite-derived NDVI timeseries data into a crop monitoring platform serving 24 districts.
TANGIS provides UAV multispectral survey services and precision agriculture analytics for government, NGO, and commercial clients across Tanzania and East Africa. Contact our agriculture intelligence team to discuss your program requirements.
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