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How the crowd draws

492 drawings of its land border and 796 drawings of its coast, from memory on Borderline’s World map, 17 September 2026 to 27 October 2026.

Draw Tanzania

In numbers

Last updated on 27 October 2026
The real oneThe crowd’s
Area943,000 km²364,000 sq mi906,000 km²350,000 sq mi3.9% smaller
Outline4,767 km2,962 mi4,474 km2,780 mi6.1% shorter
Centre34.79° E, 6.27° S34.8° E, 6.3° S34.94° E, 6.38° S34.9° E, 6.4° S21 km south-east13 mi south-east
Westernmost29.32° E, 4.85° S29.3° E, 4.8° S29.43° E, 4.48° S29.4° E, 4.5° S12 km short8 mi short
Easternmost40.45° E, 10.35° S40.4° E, 10.4° S40.43° E, 10.35° S40.4° E, 10.4° S2 km short1 mi short
Southernmost36.57° E, 11.73° S36.6° E, 11.7° S36.63° E, 11.65° S36.6° E, 11.6° S9 km short6 mi short
Northernmost30.78° E, 0.99° S30.8° E, 1.0° S30.82° E, 1.13° S30.8° E, 1.1° S16 km short10 mi short

Near the land border, 63% of the crowd’s lines run inside Tanzania. Near the coast, 33% 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.

Tanzania and Kenya: 749 km in the game, 775 km officially.

Tanzania’s coast: 1,145 km in the game, 1,424 km officially.

8 neighbours
Border withIn the gameThe crowd’s
Kenya749 km in the game775 km officially729 km the crowd’s2.7% shorter
Mozambique681 km in the game840 km officially643 km the crowd’s5.6% shorter
Dem. Rep. Congo471 km in the game479 km officially457 km the crowd’s3.0% shorter
Malawi419 km in the game512 km officially409 km the crowd’s2.4% shorter
Uganda386 km in the game391 km officially397 km the crowd’s2.8% longer
Burundi357 km in the game589 km officially356 km the crowd’s0.3% shorter
Zambia304 km in the game353 km officially293 km the crowd’s3.6% shorter
Rwanda186 km in the game222 km officially200 km the crowd’s7.5% longer
The coast1,145 km in the game1,424 km officially911 km the crowd’s20.4% shorter

How it is measured

The crowd’s Tanzania: every few km along the real line, each drawing’s nearest point, inside Tanzania 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 1,288 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 1,288.

6 small pieces of Tanzania, 2,989 km² in all, keep their real shape, shown flat: islands no round asks players to draw, or too small to measure. They count in no figure.

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