On Monday 05 October 2015, Martin Koppenhoefer wrote: > > > > probably not very practical to > > differentiate between 'pipelines with a pipe' and pipelines without > > a pipe' underground. > > can you give an example for a pipeline without a pipe?
Apart from the pressure tubes of hydropower plants the most common case is probably sewer pipes. For general transport pipelines cutting them into rock is rare due to the high costs. Hydropower penstocks are an exception mostly due to the high volume high pressure combination and sewage due to the space constraints in urban environments. -- Christoph Hormann http://www.imagico.de/ _______________________________________________ Tagging mailing list Tagging@openstreetmap.org https://lists.openstreetmap.org/listinfo/tagging
