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How a group spreads

Studied from its original page

Pilot-chart wind rose

Made by
US Navy Hydrographic Office
Year
1883
Field
Navigation and transport
Kind
Map
Room
How a group spreads
Pilot-chart wind rose
Plate from US Hydrographic Office pilot charts, from 1883David Rumsey Map Collection, David Rumsey Map Center, Stanford University LibrariesLicence: CC BY-NC-SA 3.0Changes to the image: cropped, resized

See the original page — Pilot Chart of the North Atlantic Ocean, January 1890, Explanation box, lower centre (IIIF region 3150,6350,2650,1000 of the 11111x7582 scan)

Published 1890 (A, and also a US federal work) and a government work published before 1955 (B).

The data it needs

  • position identity · categorical · grid cell
  • direction axis · ordinal · compass sector
  • frequency value · quantitative · percent
  • modal_force value · ordinal · Beaufort
  • residual value · quantitative · percent calms

Built in 6 steps, as its maker described

chart legend; not opened

Skeleton drawing, not the original plate

5 other forms share this skeleton

Source

US Hydrographic Office pilot charts, from 1883

Attribution less certain: contested, or no single inventor recorded

Searches, not citations

archive.orgcommons.wikimedia.orgscholar.google.com