2010/9/7 <ed...@billiau.net>: > >> >> no, this is definitely not a pole. Poles have to be solid cylinders, >> but you might be right that they can be hollow, not sure about the >> latter. >> > > A power pole made of concrete (as used in new south wales, australia, is > hollow. > It's a material used and construction thing - just like bones are hollow > because they are stronger that way
actually they are not "hollow" because they are stronger that way but because they are lighter maintaining more or less the strength (let's say they are optimized). In case of hollow columns/poles they are sufficiently strong for the usecase but need much less material (so they are cheaper and lighter). Cheers, Martin _______________________________________________ Tagging mailing list Tagging@openstreetmap.org http://lists.openstreetmap.org/listinfo/tagging
