Topographic map of Zanzibar Archipelago, Tanzania.
Roads, rivers and place names based on a public domain 1976 CIA map (from http://www.lib.utexas.edu/maps/tanzania.html) with some updates applied.
Topography based on public domain SRTM data from NASA as modified by CGIAR.
Bathymetry based on Becker et al., Global Bathymetry and Elevation Data at 30 Arc Seconds Resolution: SRTM30_PLUS, Marine Geodesy, 32:4, 355-371, 2009.
The small outline of Africa was derived from File:BlankMap-Africa.svg.
Data was processed in Perl.
Everything was put together &amp; laid out by Mysid in Inkscape and edited for validity in Vim.
Mysid, translated:--MacedonianBoy (talk) 12:52, 12 September 2011 (UTC)