OpenStreetMap

UK ITO! OSM Analysis has new road comparison data from OS Locator

Posted by James Derrick on 15 May 2016 in English (English)

Another round of Ordnance Survey data has been released and processed by ITO! to produce a very useful comparison against OSM. Once again, their very usable web slippy map, and JOSM layer this has shown up a new building site I didn't know existed ready for survey.

ITO World Open Data Tools

As well as missing developments, the comparison also showed up a fat-fingered typo from one of my past surveys - quickly fixed!

As usual, don't assume OSM mappers are any better or worse than the professionals - OS data feeds from local authorities don't always match the 'ground truth' signage and so don't accept the OS Locator data has to be correct without a check particularly if OSM is marked source=survey.

If there's no signage out there to contradict or correct, then an attributed name from OS is better than none (source:name=OS Locator). If Locator is wrong, use the tag 'not:name=' to show the issue to comparison sites like ITO, and also to OS so they can check themselves.

So once again, raise a glass to OS Open data, ITO for the service, and the local groups of fellow mappers slowly increasing the comparison UK Percentage Complete beyond the current 97.60%.

Help turn all UK counties UK cyan on the overview map - a 100% match!

Location: Cramlington, Northumberland, North East England, England, United Kingdom

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