Tim Keitt. Author.
Barry Rowlingson. Author, contributor.
Edzer Pebesma. Contributor.
Michael Sumner. Contributor.
Robert Hijmans. Contributor.
Daniel Baston. Contributor.
Even Rouault. Copyright holder, contributor.
Frank Warmerdam. Copyright holder, contributor.
Jeroen Ooms. Contributor.
Colin Rundel. Contributor.