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Table 4 Directional trends for Swedish municipalities

From: Spatiotemporal characteristics of pandemic influenza

Features Short axis (km) Long axis (km) Rotation (degrees clockwise from noon)
Municipalities (no weight factor) 274,869 894,632 16.5
Municipalities with population 1890 as weight factor 268,830 869,145 14.6
Municipalities with population 1957 as weight factor 281,462 830,222 19.0
Municipalities with population 2009 as weight factor 280,916 769,970 22.4
  1. The table shows the compass angle of the long axis of the standard deviational axis for Swedish municipalities. Population is added as weight factor for the years 1890, 1957 and 2009.
  2. Skog et al.