Studied from its original page
Thermoisopleth diagram
Thermoisoplethen-Diagramm
- Made by
- Carl Troll
- Year
- 1943
- Field
- Meteorology and climate
- Kind
- Data display
- Room
- Change over time
Not shown here: its rights are not cleared
See the original page — Abb. 1 a-c, printed p. 95 (PDF page 2)
Fails both tests: published 1967 (A) and Carl Troll, whose diagrams the figure reproduces, died 1975 (B would run to 2045).
The data it needs
day_of_yearposition · ordinal · dayhourposition · ordinal · hourvaluevalue · quantitative · degC
Built in 4 steps, as its maker described
not opened
18 other forms share this skeleton
Source
Troll 1943, Petermanns Geogr. Mitteilungen 89
No direct source found yet
Attribution less certain: contested, or no single inventor recorded