PierZen has commented on the following diary entries

Post When Comment
Analysis Walk-thru: How many contributors are editing in each Country? 3 months ago

A recent blog did show that 50% of the Canada population only occupy 2% of the territory. To take account of large territories like Canada, where there is almost no poputation in the nordic parts, a good comparizon would be the contributors per city area in the main cities.

Preparing accurate history and caching changesets 5 months ago

I talk about developping scripts to analyze the data. If we could obtain this data as geojson outputs, it would be great.

Preparing accurate history and caching changesets 5 months ago

Great geohacker.

To monitor an area, we need to query for the changesets for a given BBOX and datetime period. We cannot rely on the OSM API to provide the list of changesetid since the Api service limits the no. of changesets to query. And Overpass do not provide this facility.

Do you plan to provide such service? This would let develop tools without first installing a server and loading all OSM data.

JOSM reaches version 10000 in its 10th year over 1 year ago

Eh, Great number.

Bravo to the JOSM developpers who contributed since 2006 to the JOSM Core and the various plugins.

Fast OpenStreetMap micro tasking with To-Fix and JOSM almost 2 years ago

Thanks Rub21

An interesting tool. I had no problem to install. Such tool can be very usefull for various projects to validate.

It would be interesting to add Semantic evaluation to such tool assuring that objects represent adequately Features. For example, are they missing tags to represent one of the features such as building, highway, waterway, landuse, POI, etc. Features cannot be represented adequately if only supplemental tags are included such as surface, width, name, etc.

In the list of tasks, I suggest to add a description of the problem when we pass the mouse over a task. For example

Impossible one-way - does this suggest to add a specific tag to indicate an end of road? Loopings - what's wrong if I trace a circle at the end of the road where people can change direction? Highway intersects highway - Indicate that the nodes are not connected. etc.

Initial activity and retention of first-time HOT contributors over 2 years ago

@deskstop The main objective of the Activations is not to bring in new HOT contributors and assure their progress. This is to respond to an emergency. But these events are surely very motivating and bring in a lot of new contributors. Many organisations, universities, OSM local communities and Missing Maps, etc take the opportunity of the media coverage about such events to invite people to their mapathon. If a local OSM community or Missing Maps has success retaining contributors participating to such events, should we say that HOT lost this participation?

This is a biased analysis to consider only specific HOT activities to evaluate retention of OSM mappers.

Adding to that, your sample size and time span are too short to conclude anything.

Initial activity and retention of first-time HOT contributors over 2 years ago

Is your retention measure vs OSM activity in general or HOT specific tasks you determine? I suspect that you measure the total OSM activity. Otherwise, I would also consider this as a biased measure of the OSM retention.

Your MM sample is too small and the time span too short to conclude at this point about the trajectory of the contributors. Yes it would be interesting to measure over longer periods. Measure of retentions up to 6 - 9 months would help to analyze further the trajectories of contributors.

It would be interesting to compare the trajectory of contributors that participate to periodic meetings with others, to see if they have the same mapping profile, how their volume of objects edited progress.