http://www.asklater.com/matt/wordpress Obligatory WordPress weblog Sun, 21 Aug 2011 21:36:50 +0000 http://backend.userland.com/rss092 en I gave a talk at State of the Map, OSM's annual conference, about the minutely diffs; why they should be used, a little introduction on how they could be used and some examples of things that already use them. I also used the talk to advertise the OWL system I've ... http://www.asklater.com/matt/wordpress/2010/07/12/osm-without-delay-sotm10-talk/ I've been playing with the changeset data for OpenStreetMap and looking to see what patterns I can find in the usage of various editors since changesets were introduced in the API 0.6 migration. We can start off just looking at the major editors by distinct users, i.e: everyone's favourite popularity ... http://www.asklater.com/matt/wordpress/2009/12/04/editor-retention/ Thanks for the feedback on the previous post on imports; it got me thinking about whether my model had been over-elaborate. Specifically, the limit on the model agents which capped the maximum "completeness" levels at which they would contribute. I thought this was a necessary part of the model, but ... http://www.asklater.com/matt/wordpress/2009/09/10/imports-and-the-community-ii/ I've been thinking recently on the effects of imports on the OpenStreetMap community. But there's no real hard data — and repeatable experiments would be difficult if not impossible. So I've turned to that old "what if" machine; the Monte-Carlo simulation. A caveat before reading the whole post: I've no ... http://www.asklater.com/matt/wordpress/2009/09/06/imports-and-the-community/ Just for fun, here's an animated one: Each frame shows the majority editor in each pixel over a moving 7-day period starting at the date in the lower left of the frame. http://www.asklater.com/matt/wordpress/2009/08/30/editor-popularity-ii/ A while ago, I made a visualisation showing which were the most widely-used editors for OpenStreetMap. This was based on the created_by tag, which isn't an ideal way to do things because different editors treated that tag in different ways. Since the API 0.6 upgrade, there has been a better ... http://www.asklater.com/matt/wordpress/2009/08/29/editor-popularity/ I haven't updated this blog in a while because I've been hard at work on some very important changes to the OSM server stack. Have a look at Steve's announcement for the high-level vision and continue on here for the low-level techniques we've used to speed the server up by ... http://www.asklater.com/matt/wordpress/2009/04/01/some-changes-to-osm-technical-details/ A mappy Christmas and geolocated New Year to everyone! No, this isn't a real map, unfortunately :-) I created this in JOSM, imported it using osm2pgsql and rendered using my vector icons patched version of mapnik. (Note to self: release these patches, finally...) Cheers! http://www.asklater.com/matt/wordpress/2008/12/21/mappy-christmas/ Another release of the custom icon set I've been working on (and off). More lovely Moo custom-printed stickers. Click the button below, using Moo's new XML API, to start creating cool stickerbooks. New icons in the 0.4 release: Cinema: Classic film-strip image. I'm not sure if the detail is too small to see ... http://www.asklater.com/matt/wordpress/2008/11/27/icons-04/ Here is an animation, like this one, but for the period covering the Wembley mapping party a week and a bit ago. A high res version, which is much, much better, is here. http://www.asklater.com/matt/wordpress/2008/10/21/wembley-mapping-party-animation/