A spatial analysis project assessing smallholder farm viability to support agricultural loan disbursement and farmer onboarding, modelled on ThriveAgric's farm mapping workflow.
This project uses GIS-based spatial analysis to assess the agricultural viability of 24 sample smallholder farms in Kachia LGA, Kaduna State, one of Nigeria's leading ginger producing zones. Eight environmental factors were combined into a single Farm Viability Score using weighted overlay analysis, with all data processed at 30m resolution.
| Class | Farms | % | FAO | Recommendation |
|---|---|---|---|---|
| High | 10 | 42% | S2 | Full loan disbursement |
| Medium | 12 | 50% | S2 | Standard conditions |
| Low | 2 | 8% | S2 | Field verification |
All 24 farms = FAO S2 Moderately Suitable
- Water proximity is the primary limiting factor
- Kachia is predominantly flat — ideal for farming
- Soil fertility is moderate — responds well to inputs
- SQI: 0.587–0.678 (Moderate to Good)
- pH 5.5–6.4 — ideal for ginger, maize, sorghum
- All farms within FAO S2 classification
All data processed in QGIS 3.40, EPSG:32632
| Factor | Source | Weight |
|---|---|---|
| Organic Carbon | iSDAsoil 30m | 20% |
| NDMI Moisture | GEE Landsat 8 | 15% |
| Nitrogen | iSDAsoil 30m | 15% |
| Soil Texture | iSDAsoil 30m | 15% |
| pH | iSDAsoil 30m | 10% |
| Slope | USGS SRTM | 10% |
| Water Distance | OpenStreetMap | 10% |
| Phosphorus | iSDAsoil 30m | 5% |
Viability = (Carbon×0.20) + (NDMI×0.15) +
(Nitrogen×0.15) + (Texture×0.15) +
(pH×0.10) + (Slope×0.10) +
(Water×0.10) + (Phosphorus×0.05)
SQI = (Carbon×0.30) + (Nitrogen×0.25) +
(Phosphorus×0.25) + (pH×0.20)
| Tool | Purpose |
|---|---|
| QGIS 3.40 | GIS analysis and map production |
| Google Earth Engine | Landsat 8 NDMI processing |
| iSDAsoil (30m) | African soil property data |
| GDAL Proximity | Water distance rasters |
| QGIS Zonal Statistics | Farm score extraction |
| Google Earth Pro | Farm digitizing |
├── Farm_Viability.png
├── Farm_Classification.png
├── Factor_Maps.png
├── SQI.png
├── Farm_Viability_Results.csv
├── Farm_Viability_Assessment_Kachia.pdf
└── README.md
| Dataset | Source |
|---|---|
| Soil Properties | iSDAsoil |
| DEM/Slope | USGS EarthExplorer |
| NDMI/Landsat | Google Earth Engine |
| Rivers/Water | OpenStreetMap |
| Farm Polygons | Google Earth Pro |
Timothy Adeneye
Remote Sensing and GIS Analyst
📍 Nigeria
🔗 GitHub
Methodology aligned with ThriveAgric's farm mapping and loan disbursement workflow.