How big is Guinea-Bissau's transmission network?

OverWatts maps 368 km of transmission line in Guinea-Bissau, across 21 segments, plus 0 substations. This is mapped length from OpenStreetMap, not an operator-reported total — where OSM is incomplete the figure is a floor, never a ceiling.

What voltage is Guinea-Bissau's grid?

Most of the mapped network is high voltage (220–379 kV): 368 km of 368 km. The highest voltage tagged anywhere in the country is 225 kV.

How complete is the grid map for Guinea-Bissau?

Partial — 10.1 km of mapped line per 1,000 km² of land, ahead of 38% of the 153 countries with any mapped grid. Coverage grades how completely OpenStreetMap has drawn the network, not how much network exists; large, sparsely-populated countries score low for geographic reasons alone.

Who operates the grid in Guinea-Bissau?

Senelec are tagged as operators on mapped segments. Operator tags are present on 5% of Guinea-Bissau's segments, so this ranks who is *recorded*, not market share.

Guinea-Bissau · electricity network

Guinea-Bissau power grid

OverWatts maps 368 km of Guinea-Bissau's electricity transmission network across 21 line segments and 0 substations, the 135th most-mapped grid of 153 countries. Its backbone is high voltage (220–379 kV), carrying 368 km — 100% of the mapped length, with the highest tagged voltage at 225 kV. That works out to 10.1 km per 1,000 km² of land — partial OpenStreetMap coverage, ahead of 38% of mapped countries.

Open the grid lens →Guinea-Bissau profile →

368 km

Mapped transmission line

Substations

#135

of 153 mapped grids

225 kV

Highest voltage

OpenStreetMap coverage

Partial10.1 km / 1,000 km²ahead of 38% of 153 mapped countries

This grades how completely OpenStreetMap has drawn Guinea-Bissau's network — not how much network exists. Large, sparsely-populated countries score low for geographic reasons alone, and every kilometre here is mapped length, so the totals are a floor rather than an operator-reported figure. 5% of segments carry a real line name and 5% an operator tag.

Mapped line length by voltage

220–379 kV368 km 100%

21 segments · a segment is credited to the country containing its midpoint, so a border-crossing line counts once, on one side.

Operators tagged on Guinea-Bissau's network

Senelec1 100%

Segment counts from OSM `operator` tags, merged across spellings. Present on 5% of segments — this ranks who is recorded, not market share.

How Guinea-Bissau compares · mapped grid by country

Frequently asked

How big is Guinea-Bissau's transmission network?: OverWatts maps 368 km of transmission line in Guinea-Bissau, across 21 segments, plus 0 substations. This is mapped length from OpenStreetMap, not an operator-reported total — where OSM is incomplete the figure is a floor, never a ceiling.
What voltage is Guinea-Bissau's grid?: Most of the mapped network is high voltage (220–379 kV): 368 km of 368 km. The highest voltage tagged anywhere in the country is 225 kV.
How complete is the grid map for Guinea-Bissau?: Partial — 10.1 km of mapped line per 1,000 km² of land, ahead of 38% of the 153 countries with any mapped grid. Coverage grades how completely OpenStreetMap has drawn the network, not how much network exists; large, sparsely-populated countries score low for geographic reasons alone.
Who operates the grid in Guinea-Bissau?: Senelec are tagged as operators on mapped segments. Operator tags are present on 5% of Guinea-Bissau's segments, so this ranks who is *recorded*, not market share.

Elsewhere in Guinea-Bissau

Transmission lines Substations Power plants Data centres

Network geometry: OpenStreetMap (ODbL) © OpenStreetMap contributors, ingested and measured by OverWatts · derived 2026-07-26. Counts every mapped line of 220 kV and above; the map layer draws the ≥380 kV backbone only, so it shows less than is measured here.