Prime meridians in medieval Islamic astronomy

  title={Prime meridians in medieval Islamic astronomy},
  author={Edward S. Kennedy and Mary H. Regier},
  journal={Vistas in Astronomy},
Meridians of reference and mathematical geography in the Medieval Muslim West
The analysis of geographical coordinates extracted from the Kennedy & Kennedy's book "Geographical coordinates of localities from Islamic sources" (1987), allows a renewed vision of mathematical
From fortress flagpole to the Greenwich line: The establishment of a common prime meridian in Norway in the period 1770–1970
  • A. C. Lien
  • History
    Norsk Geografisk Tidsskrift - Norwegian Journal of Geography
  • 2019
ABSTRACT The author analyses the use of prime meridians on selected Norwegian maps in the period 1770–1970. The aim is to show the progression from a time of multiple local prime meridians, through a