Citizen Science & Scientific Crowdsourcing – week 5 – Data quality

This week, in the "Introduction to Citizen Science & Scientific Crowdsourcing", our focus was on data management, to complete the first part of the course (the second part starts in a week's time since we have a mid-term "Reading Week" at UCL). The part that I've enjoyed most in developing was the segment that addresses … Continue reading Citizen Science & Scientific Crowdsourcing – week 5 – Data quality →

Usability of VGI in Haiti earthquake response and the 2nd workshop on usability of geographic information

On the 23rd March 2010, UCL hosted the second workshop on usability of geographic information, organised by Jenny Harding (Ordnance Survey Research), Sarah Sharples (Nottingham), and myself. This workshop was extending the range of topics that we have covered in the first one, on which we have reported during the AGI conference last year. This … Continue reading Usability of VGI in Haiti earthquake response and the 2nd workshop on usability of geographic information →

OpenStreetMap Quality evalution and other comparisons

A comparison of my analysis of OpenStreetMap (OSM) quality evaluation to other examples of quality evaluation brings up some core issues about the nature of the new GeoWeb and the use of traditional sources. The examples that I’m referring to are from Etienne Cherdlu’s SOTM 2007 ‘OSM and the art of bicycle maintenance’, Dair Grant’s … Continue reading OpenStreetMap Quality evalution and other comparisons →

OSM quality evaluation

In the past year I have worked on the evaluation of OpenStreetMap data. I was helped by Patrick Weber, Claire Ellul, and especially Naureen Zulfiqar who carried out part of the analysis of motorways. The OSM data was compared against Ordnance Survey Meridian 2 and the 1:10,000 raster as they have enough similarity to justify … Continue reading OSM quality evaluation →