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<p>With about 11k occurrences (<a href="http://taginfo.openstreetmap.org/keys/industrial#overview">http://taginfo.openstreetmap.org/keys/industrial#overview), </a>industrial=* is mostly used for oil infrastructure but also for other sorts of industrial activities.</p>
<p>factory=* only occurs 569 times - with various values: <a href="http://taginfo.openstreetmap.org/keys/factory#overview">http://taginfo.openstreetmap.org/keys/factory#overview</a> - I like industrial=* better because it covers more than factories.</p>
<p>man_made=works dominates with about 83k occurrences: <a href="http://taginfo.openstreetmap.org/tags/man_made=works#overview">http://taginfo.openstreetmap.org/tags/man_made=works#overview</a> - its problem is that it requires an additional tag to describe its nature, such as product=* (1844 occurrences - <a href="http://taginfo.openstreetmap.org/keys/product#overview">http://taginfo.openstreetmap.org/keys/product#overview</a><a href="http://taginfo.openstreetmap.org/keys/product#values)">)</a> or works:type (210 occurrences - <a href="http://taginfo.openstreetmap.org/keys/works%3Atype#overview">http://taginfo.openstreetmap.org/keys/works%3Atype#overview</a>) which describes either the product or the type.</p>
<p>Also, the power=* space is a world of its own and there are quite a few industrial facilities in the man_made=* space such as 37k man_made=wastewater_plant or 128k man_made=storage_tank (<a href="http://taginfo.openstreetmap.org/keys/man_made#values)">http://taginfo.openstreetmap.org/keys/man_made#values)</a>.</p>
<p>So, if we exclude the power=* world and the man_made=* description of specific industrial objects, if we discount the marginal presence of factory=* (which may perhaps be discouraged considering the dominance of alternatives), that leaves us with either standalone industrial=* or the combination of man_made=works with a complementary tag such as product=* or works:type=* - which both have merits and popularity.</p>
<p>So, what does <a href="mailto:tagging@openstreetmap.org">tagging@openstreetmap.org</a> thinks about that ? Is the tagging of industrial production sites and their products ripe for standardization ? Which way seems like the right one to you ?</p>
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