OpenStreetMap

PierZen has commented on the following diary entries

Post When Comment
Building Canada 2020 10 days ago

@mikel, you should re-read the thread below where Julia C from MapBox writes to Talk-ca, saying that MapBox is collaborating with StatCan to engage Canadian universities to participate in the Building Canada 2020 project. [Talk-ca] Building Canada 2020 OSMGeoWeek Mapathons https://lists.openstreetmap.org/pipermail/talk-ca/2017-October/008123.html

As it has been answered in the Thread, The OSM Canada community was not consulted, has other priorities and not the resources to cleanup the map afterwards.

2017-11-11[Talk-ca] Integrating the statistical and geospatial data with ECLAC, United Nations https://lists.openstreetmap.org/pipermail/talk-ca/2017-November/008194.html

It looks like we are forcing OSM-Canada community again. But no response yet from the community to support this.

If we are looking at the Missing Map Projects, a lot of marketing is done by the Partner organizations, projects started everywhere with not enough support from the organizations that initiate these projects. And the problems are left to the OSM community. If you are not convinced, go back to what has been done for Haiti in 2016, prior to the October Cyclone and the two weeks after the cyclone. Quite disturbing! Re-read the threads on the HOT list. We dont want that in Canada.

OSM is a community driven organization. Partner organizations should respect this, not force the hand to the communities for projects they planned without discussion with the community.

OSM Contributors Outlook - The Pulse of OpenStreetMap Contributors about 1 month ago

I uploaded the tables on Github since it has minimal Markdown table formatting that OSM Diary do not recognize.

See https://github.com/pierzen/OsmContributorStats-Changesets/blob/master/Pulse_of_OpenStreetMap_Contributors_2017-10-11

OSM Contributors Outlook - The Pulse of OpenStreetMap Contributors about 1 month ago

Table formatted

Contributors, Monthly average of participation by year

           All Veterans Veterans 
Year Contributors        in % of year 
2010    13,059  6,598   50.5% 
2011    16,003  8,531   53.3% 
2012    20,078  10,182   50.7% 
2013    21,594  11,857  54.9% 
2014    25,322  13,506  53.3% 
2015    27,048  15,176  56.1% 
2016    38,357  16,393  42.7% 
2017    47,486  22,839  48.1%
OSM Contributors Outlook - The Pulse of OpenStreetMap Contributors about 1 month ago

VS Graph 4a contributions, we observe a constant fluctuation of new contributors with an increae at the end of every year. At the same time, there is a significative retention of veterans after the first years of contribution. The table below shows the average contributors by year for each yearly cohort. I also added for each year of contribution the share in % of veterans. Has we see, their share decreased in 2016-2017 with the increase of new contributors. The impact on Total contribution, this is an other story.

Contributors, Monthly average of participation by year All Veterans Veterans Year Contributors in % of year 2010 13,059 6,598 50.5% 2011 16,003 8,531 53.3% 2012 20,078 10,182 50.7% 2013 21,594 11,857 54.9% 2014 25,322 13,506 53.3% 2015 27,048 15,176 56.1% 2016 38,357 16,393 42.7% 2017 47,486 22,839 48.1%

OSM Contributors Outlook - The Pulse of OpenStreetMap Contributors about 1 month ago

Second point, the days of participation is one of the measure of Intensity of contribution. While I consider it better then the number of changesets, it is exact that it cannot take account of all the contribution profiles. Analysing these statistics of contribution, we see that averages do not worth much with outliers being more the norm.

What type of synthetic indicator of intensity other then the cumulative number of Contributions could explain intensity of contribution? There is a great variety of behaviors, with more or less days of participation and more or less volume of edits per day.

OSM Contributors Outlook - The Pulse of OpenStreetMap Contributors about 1 month ago

Thanks for your comment,

You are right, Graph 1 is in fact a serie of graphs sticked together. And yes, it could be confusing if interpreted as a long timeserie. I show only 12 months, but I could have a longer period for each graph. By placing these graphs side by side, it let you compare behavior from year to year. We could also group data for longer periods. I amended the text with a note on this serie of graphs.

We often see statistics of big numbers like the new entries every year. Here we can see for month 1 of earch yearly cohort these entries, and follow the contributor's behavior in the months that follow. We see that there is a constant behavior from year to year.

It let's observe a Pareto distribution that some also call the Long tail distribution. It let's us observe survival functions from month 1 of the contribution.

Géocodage d'établissements scolaires about 1 month ago

Voici une requête Overpass qui permet d'interroger OSM simplement. Umap permet également des requêtes dynamiques vers Overpass. http://overpass-turbo.eu/s/sg7

Travail de sabotage about 1 month ago

Bonjour, j'ai utilisé la section commentaire du changeset pour inviter le contributeur à modifier ou venir en discuter sur talk-ca.

À noter qu'il est important de nous respecter entre contributeurs et penser que les uns et les autres sont de bonne foi. À éviter, les superlatifs ! Le diary n'est pas consulté par tous. Il est plus efficace de communiquer avec le contributeur via la section commentaire du changeset et présenter le problème à la communauté OSM soit sur le groupe de discussion talk-ca ou le groupe de discussion de Montréal.

Cordialement

Analysis Walk-thru: How many contributors are editing in each Country? 5 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 7 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 7 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 about 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.