These heatmaps are interesting.
Neis changeset online map shows intensity of mapping only with the outset of
the bbox. Such heatmap could show the intensity of contribution in various
areas based on the number of objects.
To use this functionality for an online map with Openlayers or similar
javascript tool, we would surely need to aggregate the data. Otherwise, I dont
see with a project like the Ebola outbreak, how we could manage nearly 16
millions objects to represent on the Heatmap.
Pierre
De : Martin Dittus <mar...@dekstop.de>
À : Pierre Béland <pierz...@yahoo.fr>
Cc : hot <hot@openstreetmap.org>
Envoyé le : Lundi 23 mars 2015 18h32
Objet : Re: [HOT] Most "active" HOT projects since March 2014
Thanks for the detailed note Pierre!
We seem to be on the same page — such stats are wonderfully misleading.
I’ve tried grouping HOT projects in the past based on the available metadata
and have indeed encountered all the obstacles you mention. Part of my
motivation to share this was also to gently nudge project creators to tag more
consistently :) Such metadata can be very useful for large-scale evaluations
and visualisations.
Pierre Béland <pierz...@yahoo.fr> wrote:
>
> The best way to reflect the contributor activity is to go through the history
> and extract changesets corresponding to a bbox closed to the each Task
> Manager extent and corresponding to the period of the project.
Yeah I’ve done that in the past on an older OSM history dump, that’s how this
world map of HOT contributions was created:
https://twitter.com/dekstop/status/565211831720235009
Although that image actually visualises individual edits, not just changesets.
m.
_______________________________________________
HOT mailing list
HOT@openstreetmap.org
https://lists.openstreetmap.org/listinfo/hot
