Generated from the same geometry the printer is handed — the plate seen from directly above. It cannot show the relief, which is the part you have to hold.
The Tennessee
The river that goes the wrong way
The Tennessee flows southwest, turns almost due west, and then runs north again to reach the Ohio — a course that makes no sense until you are holding the terrain. Its headwater pieces are the oldest mountains on the continent, and several of them are rivers that were flowing before the ridges around them existed. The French Broad, one of its pieces, is among the handful of rivers in the world older than the range it cuts through.
What a child works out
- Rivers do not always run south, and the map explains why this one does not.
- Older than the mountains: some valleys were here first and the range rose around them.
- Every named piece here is a river you can find on a road map.
The plate
- Pieces
- 17 pieces
- Plate
- 250 × 176 mm
- Scale
- 1 mm ≈ 2.8 km
- Vertical exaggeration
- × 5.8
- Thickness
- 8.8 mm
- Smallest piece
- 100 mm²
- Fit
- 0.35 mm clearance
- Material
- PLA, printed in Switzerland
8 named; the rest are sub-basins the source data leaves unnamed.
B5 — the size of a school exercise book.
How much ground one millimetre of plate covers.
Height is stretched by this factor so the relief is readable at desk size.
Nothing is cut smaller than a child can pick up.
Printed in place, so every piece seats first time without sanding.
Every named piece
- Clinch
- Duck
- Elk
- French Broad
- Hiwassee
- Holston
- Holston 2
- Little Tennessee
Zoom in, zoom out
A piece of each of these is the subject of the next one. Each plate is redrawn at its own scale, so it is a real map at every level rather than an enlargement of the one above.
Follow the water — A continent to one creek, cut by ridge lines with no borders
More from Watersheds
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North America by River
A continent divided only by where water goes
No countries, no states. Twenty-nine pieces, each one the whole territory that drains into a single river.
- Pieces
- 29 pieces
- Scale
- 1 mm ≈ 49.4 km
- Suitable for
- Ages 8 and up
- Price
- CHF 120.00
The Mississippi
The basin that drains a third of a continent
Fifteen pieces — Missouri, Ohio, Arkansas, Red, Illinois — that together are about three million square kilometres of drainage.
- Pieces
- 15 pieces
- Scale
- 1 mm ≈ 14.5 km
- Suitable for
- Ages 8 and up
- Price
- CHF 120.00
The Ohio
Where the Appalachians drain west
Eighteen pieces: the Tennessee, the Cumberland, the Allegheny, the Monongahela, the Wabash and the ridges between them.
- Pieces
- 18 pieces
- Scale
- 1 mm ≈ 5.8 km
- Suitable for
- Ages 8 and up
- Price
- CHF 120.00