<ul><li>Description: This <a href="https://en.wikipedia.org/wiki/User:Anwar_saadat/bubble_maps_(FAQ)" class="extiw" title="en:User:Anwar saadat/bubble maps (FAQ)">bubble map</a> shows the global distribution of mined output of Niobium in 2007 as a percentage of the top producer (Brazil - 40,000 tonnes). This map is consistent with incomplete set of data too as long as the top producer is known. It resolves the accessibility issues faced by colour-coded maps that may not be properly rendered in old computer screens.</li>
<li>Date: Data was extracted on 8 July 2008.</li>
<li>Source: <a rel="nofollow" class="external text" href="http://www.indexmundi.com/en/commodities/minerals/columbium_(niobium)_and_tantalum/columbium_(niobium)_and_tantalum_t10.html">indexmundi.com</a> and based on <a href="https://en.wikipedia.org/wiki/Image:BlankMap-World.png" class="extiw" title="en:Image:BlankMap-World.png">en:Image:BlankMap-World.png</a></li>
<li>Author:</li></ul>
<a href="https://en.wikipedia.org/wiki/User:Exukvera" class="extiw" title="wikipedia:User:Exukvera">Exukvera</a> at <a href="https://en.wikipedia.org/wiki/" class="extiw" title="wikipedia:">English Wikipedia</a>
8 July 2008 (original upload date)
Transferred from <span class="plainlinks"><a class="external text" href="https://en.wikipedia.org">en.wikipedia</a></span> to Commons by <a href="//commons.wikimedia.org/wiki/User:ESanchez013" title="User:ESanchez013">ESanchez013</a> using <a href="https://iw.toolforge.org/commonshelper/" class="extiw" title="toollabs:commonshelper/">CommonsHelper</a>.