Hi First post to the list.
I've been looking to get access to a set of polygons for the main English administrative divisions. I'm not that concerned with the celtic regions for the time being. This data <<IS>> available via ONS/OS but with licencing restrictions. Better to use/create a free-to-use set, I thought. Working on the basis that I needed to create it myself, I took the list of schools at http://www.showusabetterway.co.uk/call/data.html#schools and matched it against the NPE postcode data. It only managed to geocode about 5% of the schools, but it was enough for my next proof-of-concept step. Using the data I was able to create voronoi cells for each Local Education Authority (well each one that contained at least one postcode in the NPE dataset). These were not very accurate in most cases, but some data is better than none. My next step was to see if I could 'help' the voronoi analysis by excluding the areas where there was already free boundary polygons available. This took me back to OSM. So I extracted the boundary data for England using something like http://osmxapi.hypercube.telascience.org/api/0.5/*[boundary=administrative][ bbox=-4.65,50.1,2,55.4] and had a good browse through it to see what I was getting. The 'free-tagging' nature of the OSM data (and this is not a criticism, just an observation) means that it is difficult to quantify the quality of the data, and also it is difficult to filter the dataset into something meaningful and useful, at least for my purposes. I figure that I am going to have to do a fair bit of clean-up on this data before it is useful to me. What would be a real waste of time would be for me to do all the cleanup, and then NOT reflect it back into the OSM dataset. Whilst I have done quite a bit of interactive editing using potlatch and josm, I haven't done any dataset uploads. So my questions are: 1) How should I approach such a data cleanup operation? and 2) Are there any agreed data tagging standards for the UK or more specifically for England? Appreciate any comments or suggestions you might have. Thks Feargal Hogan _______________________________________________ Talk-GB mailing list [email protected] http://lists.openstreetmap.org/listinfo/talk-gb
