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How the crowd draws

163 drawings of its land border and 843 drawings of its coast, from memory on Borderline’s World map, 21 September 2026 to 27 October 2026.

Draw Guinea

In numbers

Last updated on 27 October 2026
The real oneThe crowd’s
Area245,000 km²95,000 sq mi234,000 km²90,000 sq mi4.7% smaller
Outline3,911 km2,430 mi3,263 km2,028 mi16.6% shorter
Centre10.94° W, 10.44° N10.9° W, 10.4° N10.97° W, 10.42° N11.0° W, 10.4° N4 km south-west3 mi south-west
Westernmost15.08° W, 10.87° N15.1° W, 10.9° N14.90° W, 10.87° N14.9° W, 10.9° N19 km short12 mi short
Easternmost7.67° W, 8.38° N7.7° W, 8.4° N7.81° W, 8.66° N7.8° W, 8.7° N15 km short10 mi short
Southernmost9.12° W, 7.20° N9.1° W, 7.2° N8.96° W, 7.41° N9.0° W, 7.4° N24 km short15 mi short
Northernmost13.72° W, 12.67° N13.7° W, 12.7° N13.14° W, 12.57° N13.1° W, 12.6° N11 km short7 mi short

Near the land border, 56% of the crowd’s lines run inside Guinea. Near the coast, 36% run inland.

Borders and coast

Why two lengths?

A line’s length depends on how closely it is drawn. The game’s lines are simplified: they keep a point every few kilometres and cut across small bends. The official lengths, from the CIA World Factbook, are measured on other lines. A border measured on a finer line, following every bend of its rivers and ridges, comes out longer.

Coasts differ most, and either way. Some official coastlines follow every inlet and island (Canada’s 202,080 km); others are smoothed on purpose, crossing bays and sounds (the United States’ 19,924 km), and can come out shorter than the game’s.

Players draw against the game’s line and are scored against it, so the crowd’s length is compared with the game’s, both measured the same way. Set against an official length measured another way, the comparison would say more about the two methods than about the crowd.

Guinea and Mali: 739 km in the game, 1,062 km officially.

Guinea’s coast: 882 km in the game, 320 km officially.

6 neighbours
Border withIn the gameThe crowd’s
Mali739 km in the game1,062 km officially667 km the crowd’s9.7% shorter
Sierra Leone577 km in the game794 km officially542 km the crowd’s6.1% shorter
Côte d'Ivoire479 km in the game816 km officially458 km the crowd’s4.4% shorter
Liberia374 km in the game590 km officially336 km the crowd’s10.2% shorter
Guinea-Bissau317 km in the game421 km officially223 km the crowd’s29.7% shorter
Senegal284 km in the game363 km officially316 km the crowd’s11.3% longer
The coast882 km in the game320 km officially452 km the crowd’s48.8% shorter

How it is measured

The crowd’s Guinea: every few km along the real line, each drawing’s nearest point, inside Guinea or outside it; the median over a short stretch is where the crowd puts the line there, and the real outline moved by it is the crowd’s. Where the move folds a narrow inlet over itself, the loop is cut.

The 1,006 drawings that scored 10 or more on Borderline’s World map, scribbles left out, the real line the game’s own. Area true to scale; the outline copies the real line’s detail, so its length changes only where the shape moves or a loop is cut. The map lays the 1,000 most recent; the heat map, the crowd’s shape and every figure use all 1,006.

Draw Guinea yourself and add your line to the next update.