Causes and volumes are reported by operators and confirmed through NOSDRA Joint Investigation Visits. A blank quantity means unknown and is never counted as zero. New records are added over time, so the most recent months are likely undercounted.
OSM does not map every line, and route accuracy varies by contributor. A line that OSM does not map is drawn as a dashed purple trace through the median positions of its own spill sites. That trace shows where attacks happen and is not a surveyed centreline.
A named line's route is the set of OSM segments its own spills snap to. Pills mark Critical (150+ sabotage spills), High (60–149) and Elevated (20–59). The trend compares the last 12 months of the selected period with the 12 months before.
The delta is divided into cells of 0.045° (about 5 km), scored by sabotage spills in four classes: 1–4, 5–14, 15–39 and 40 or more.
Sortie time is the route flown out and back, 2L ÷ v × 60 minutes, where L is route length in km and v is cruise speed in km/h. The default is 70 km/h for a fixed-wing VTOL UAV.
Spill data: National Oil Spill Detection and Response Agency (NOSDRA), Nigerian Oil Spill Monitor. Basemap and pipeline routes © OpenStreetMap contributors, ODbL 1.0. Fallback outline: Natural Earth. Map library: Leaflet 1.9.4.