Today whilst moving bugs over from OpenStreetBugs I noticed that the Silverstone GP circuit <http://www.openstreetmap.org/relation/2259914> is tagged leisure=sports_centre and Huntingdon Racecourse<http://www.openstreetmap.org/way/111342905>is tagged with leisure=track.
Whereas it is true that Silverstone is a centre for a sport, my understanding is that leisure=sports_centre is usually used to map buildings, usually run by councils, which offer a range of facilities for different sports. Associated playing fields are usually mapped as leisure=recreation_ground. Similarly leisure=track is comprehensible to me, but would not make sense to any automated processing of tag values. I've muttered before about how extending the meaning of a tag usually degrades the tags value. In this case indiscriminate use of sports_centre means that OSM no longer becomes suitable for examining things like access to sports facilites by the general public. The other thing that this highlights is the potential need for a generic landuse type tag for areas devoted to some sporting purpose. I've noted this before in the US where people have taken to marking the in-bound areas of a ski resort with leisure=recreation_ground. Any thoughts, Jerry
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