Idle Sails · research · the flow matrix

Port prominence, derived from the flows

Under PLAN-3 a port’s prominence is an output — the sum of trade-system voyages touching it per decade (midpoints of the authored ranges) — not a load-bearing input. This is the world the flow matrix describes; compare it with the counted-record rankings to see what the European archive could and could not show.

Figures are voyage-touches per year (each voyage counts half to each endpoint). A ° marks a port not yet sailable in the simulation (no baked routes — its flows are recorded, not rendered). Istanbul, Shanghai, and Tianjin in the early decades are the point of the whole exercise: ports the ranked record could not represent, restored by evidence-classed reconstruction.

Decade#1#2#3#4#5#6#7#8#9#10
1550sLondon 639Amsterdam 558Danzig (Gdańsk) 441Istanbul (Constantinople) 440Shanghai 300Tianjin 240Alexandria 231Smyrna (İzmir) 202Amoy (Xiamen) 182Kaffa (Feodosia) 178
1560sLondon 697Amsterdam 607Danzig (Gdańsk) 476Istanbul (Constantinople) 442Shanghai 305Tianjin 244Alexandria 233Smyrna (İzmir) 207Newfoundland (St John's & the Banks) 188Amoy (Xiamen) 187
1570sLondon 755Amsterdam 656Danzig (Gdańsk) 512Istanbul (Constantinople) 444Shanghai 310Tianjin 248Alexandria 235Smyrna (İzmir) 211Newfoundland (St John's & the Banks) 200Amoy (Xiamen) 192
1580sLondon 822Amsterdam 714Danzig (Gdańsk) 548Istanbul (Constantinople) 446Shanghai 315Tianjin 252Alexandria 237Smyrna (İzmir) 216Newfoundland (St John's & the Banks) 213Hamburg 207
1590sLondon 879Amsterdam 763Danzig (Gdańsk) 583Istanbul (Constantinople) 446Shanghai 320Tianjin 256Alexandria 239Newfoundland (St John's & the Banks) 225Smyrna (İzmir) 220Hamburg 220
1600sLondon 931Amsterdam 783Danzig (Gdańsk) 578Istanbul (Constantinople) 446Shanghai 325Tianjin 260Alexandria 240Newfoundland (St John's & the Banks) 238Hamburg 227Newcastle 227
1610sLondon 981Amsterdam 809Danzig (Gdańsk) 573Istanbul (Constantinople) 445Shanghai 330Tianjin 264Newcastle 254Hamburg 240Alexandria 238Newfoundland (St John's & the Banks) 233
1620sLondon 1042Amsterdam 838Danzig (Gdańsk) 568Istanbul (Constantinople) 443Shanghai 335Newcastle 281Tianjin 268Hamburg 254Alexandria 236Smyrna (İzmir) 233
1630sLondon 1097Amsterdam 872Danzig (Gdańsk) 567Istanbul (Constantinople) 442Shanghai 340Newcastle 308Tianjin 272Hamburg 269Smyrna (İzmir) 237Alexandria 234
1640sLondon 1184Amsterdam 897Danzig (Gdańsk) 567Istanbul (Constantinople) 440Shanghai 345Newcastle 335Hamburg 278Tianjin 276Smyrna (İzmir) 241Alexandria 233
1650sLondon 1240Amsterdam 916Danzig (Gdańsk) 566Istanbul (Constantinople) 439Newcastle 362Shanghai 350Hamburg 287Tianjin 280Smyrna (İzmir) 245Marseille 235
1660sLondon 1451Amsterdam 935Danzig (Gdańsk) 564Newcastle 496Istanbul (Constantinople) 437Shanghai 355Hamburg 299Tianjin 284Smyrna (İzmir) 253Marseille 248
1670sLondon 1661Amsterdam 950Newcastle 630Danzig (Gdańsk) 562Istanbul (Constantinople) 434Shanghai 360Hamburg 310Tianjin 288Marseille 262Smyrna (İzmir) 261
1680sLondon 1872Amsterdam 965Newcastle 764Danzig (Gdańsk) 559Istanbul (Constantinople) 433Shanghai 365Hamburg 320Tianjin 292Marseille 276Smyrna (İzmir) 270
1690sLondon 2082Amsterdam 980Newcastle 897Danzig (Gdańsk) 557Istanbul (Constantinople) 432Shanghai 370Hamburg 331Sunderland 299Tianjin 296Marseille 290
1700sLondon 2295Newcastle 1031Amsterdam 996Danzig (Gdańsk) 555Istanbul (Constantinople) 431Shanghai 375Sunderland 344Hamburg 341Marseille 304Tianjin 300
1710sLondon 2484Newcastle 1118Amsterdam 1063Danzig (Gdańsk) 588Istanbul (Constantinople) 431Shanghai 382Sunderland 373Hamburg 368Marseille 328Tianjin 305
1720sLondon 2676Newcastle 1204Amsterdam 1157Danzig (Gdańsk) 648Istanbul (Constantinople) 432Sunderland 401Hamburg 395Shanghai 389Marseille 352Smyrna (İzmir) 323
1730sLondon 2870Newcastle 1290Amsterdam 1252Danzig (Gdańsk) 707Istanbul (Constantinople) 432Sunderland 430Hamburg 423Shanghai 395Marseille 376Smyrna (İzmir) 342
1740sLondon 3076Newcastle 1376Amsterdam 1342Danzig (Gdańsk) 758Sunderland 459Hamburg 455Istanbul (Constantinople) 432Shanghai 402Marseille 400Smyrna (İzmir) 360
1750sLondon 3282Newcastle 1463Amsterdam 1432Danzig (Gdańsk) 810Sunderland 488Hamburg 487Istanbul (Constantinople) 433Marseille 424Shanghai 409Smyrna (İzmir) 379
1760sLondon 3565Amsterdam 1630Newcastle 1594Danzig (Gdańsk) 971Hamburg 539Sunderland 531Marseille 442Istanbul (Constantinople) 428Shanghai 416Smyrna (İzmir) 391
1770sLondon 3862Amsterdam 1877Newcastle 1725Danzig (Gdańsk) 1173Hamburg 602Sunderland 575Marseille 460Istanbul (Constantinople) 423Shanghai 423Riga 410
1780sLondon 4159Amsterdam 2120Newcastle 1856Danzig (Gdańsk) 1375Hamburg 666Sunderland 619Marseille 478Riga 471St Petersburg 463Shanghai 430
1790sLondon 4444Amsterdam 2349Newcastle 1975Danzig (Gdańsk) 1583Hamburg 717Sunderland 658St Petersburg 550Riga 543Königsberg 474Marseille 448
1800sLondon 4529Amsterdam 2138Newcastle 2094Danzig (Gdańsk) 1398Sunderland 698Hamburg 673St Petersburg 550Riga 531Shanghai 443Königsberg 413
1810sLondon 4527Newcastle 2213Amsterdam 1877Danzig (Gdańsk) 1173Sunderland 738Hamburg 626St Petersburg 550Shanghai 450Riga 439Istanbul (Constantinople) 384

Idle Sails · PLAN-3 · derived from research/flows/*.json (60 systems × 27 decades) · regenerate with research/tools/build-s3-pages.mjs · see also The chart’s silences