SPHERE: A contouring program for spherical data

Peter J. Diggle, Nicholas I. Fisher

Research output: Contribution to journalArticlepeer-review

34 Scopus citations


This paper describes a method for displaying a sample of spherical data, by computing an "optimally" smoothed estimate of the underlying distribution and making a stereographic projection of the contours of this estimate. An interactive FORTRAN program which applies this method is supplied and described and examples given of its use.

Original languageEnglish (US)
Pages (from-to)725-766
Number of pages42
JournalComputers and Geosciences
Issue number6
StatePublished - 1985
Externally publishedYes


  • Axial data
  • Cross-validation
  • Density estimation
  • Nonparametric method
  • Spherical data
  • Vectorial data

ASJC Scopus subject areas

  • Information Systems
  • Computers in Earth Sciences
  • Earth and Planetary Sciences(all)
  • Environmental Science(all)


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