On Mon, July 2, 2018 11:55 am, AMEGAYIBO Kokou ELolo wrote: > > The majority of these tasks were created in training workshops on > OpenStreetMap in Bamako, quality control work is done afterwards by the > local community normally. I share your points of view, but for training > workshops it is our best method to channel, control the work of the > newbies and also familiarize them with the use of the Tasking Manager. > I am open to any contribution who can help us improving our approach.
I understand the difficulty of getting large numbers of new contributors started with Openstreetmap - mistakes are normal and must be accepted as a cost of growing the project. Nevertheless, I think that there are ways to keep that cost lower. First, and most important, I believe that quality control should not be relegated to "done afterwards" - especially with less proficient contributors who are most likely to make mistakes, and especially if they are enthusiastic (it pains me to see incredible dedication in go to waste). Quality control must be an integral part of the contribution and that must be drilled into new contributors as early as possible. Insist on using the JOSM Validator, have the users look at their own contributions on Osmose... Show them how to be more responsible of their own work ! Or course, having experienced users supervise is valuable but they are a scarce resource and most importantly they risk infantilizing less experienced contributors. Most of my own contributions start with looking at Osmose, seeing a bunch of errors and I start editing there... Quality control is a core skill for everyone, at every level of proficiency. Second, have users. Creating data costs, maintaining it costs... Why are we doing it ? We are doing it for users. How do we judge quality ? I am as fond of the map as an aesthetic object as anyone here but we all agree that we want to put our efforts to good uses - so we judge quality by the fitness of the product for a particular use. If the data has no users, it is dead data. For example, as a user, I am a walker and a cyclist - I enjoy buildings on the map as landmarks to help me navigate... That is my personal way of judging quality - but other users may have other ways: to some users the purpose of having buildings in Openstreetmap may just be "there is a building here and its shape is not that important" - and maybe those users are the majority, who knows ? So, as a producer of data, be aware of how the data is used - that is the key to rational quality control. That remains true if you just chose the buildings as a new contributor training object. Third, make sure that the most recent imagery of decent quality is used. For the specific case of Bamako and at the current time, ESRI World is better than Bing: https://i.imgur.com/w6YBG70.jpg - of course, this is subject to change over time. In understand that, for lack of available properly surveyed geodesic reference points, large numbers of users working with multiple sources of imagery generates its own challenges (I found that particularly frustrating in Dakar's suburbs). _______________________________________________ HOT mailing list HOT@openstreetmap.org https://lists.openstreetmap.org/listinfo/hot