Bloggage update: As a fitting end to the Medieval Fenlands Mashup, UK Ordnance Survey will update their Parish shape files that had errors in East Anglia. These were found by running Socium's Online Validation on data downloaded for the purposes of mapping economic wealth in the region since Domesday 1067 survey. HC Darby and Julie Bowring data were simply added to the shapefiles by hand, so that a validation procedure seemed prudent. That is when we noted 25 spikes and kickbacks among 1900 poylgons, pretty good by digitizing standards at 1.3%. It was then a matter of alerting Ordnance Survey in one of their OpenData meet-ups, and presto! we looped the Volunteer Geographic Information loop by feeding back suggestions for the agency to correct. This is one of the benefits of the UK Government opening survey data to the public, who can help improve it in a new twist on crowd-sourcing.