On 15/12/11 01:22, Jason Cunningham wrote: > I can see much of the woodland is an exact match for woodland is OSM > whose source is OS vectormap district. So one of the sources is > Ordnance Survey.
It certainly seems to be from Ordnance Survey. But there are some oddities. Before the change, Google maps reproduced a number of errors that had been revealed in OS OpenData by mappers. When these are found, the wrong names are tagged as not:name, you can see them for each area here: http://www.itoworld.com/product/data/osm_analysis/main I checked some of these errors after the change and lo and behold! they are corrected, and now show the same as OSM. However, other such errors have arisen. Now I have also checked to see if these exists in OS MasterMap. From what I can see, Google's current errors match OS MasterMap. Before the change they matched OS OpenData. (Another question is how a different set of errors to those found on MasterMap ended up in OS OpenData). > There are several buildings, eg schools, with accurate outlines, > where would this data have come from? This is strange too. I noticed that the new Gmaps data includes some for the University of East Anglia: http://g.co/maps/u4pz3 But the data found is beyond what is found in MasterMap, as that is simply the building names. It turns out they have exactly the information that is found in the university's own PDF campus map: http://www.uea.ac.uk/about/gettinghere/campusmap I'm curious so thinking about putting in a FOI request to the uni to see if they have provided Google with this information. -- Borbus. _______________________________________________ Talk-GB mailing list [email protected] http://lists.openstreetmap.org/listinfo/talk-gb
