Re: [OSM-dev] area filtering on change streams?
Am 21.01.2013 08:00, schrieb Frederik Ramm: Hi, On 01/21/13 07:54, Brian Cavagnolo wrote: I'm kinda hooked on the appeal of only working with the changeset. I poked around the osmosis source and learned a bit about the change format. It looks like changes could be filtered using the same code used for the polygon and bounding box filters. Does this sound intuitively correct? No. The fact that changesets cannot be filtered by region is not a software limitation, it is a design limitation. Changes can occur in nodes, ways, or relations; but only nodes have a geometry given in the .osc file. For example, an .osc file might contain the information "way #17 has been changed from highway=residential to highway=unclassified" but you won't know if that is relevant to you because the nodes of that way are not included in the changeset (unless by chance they have been modified at the same time). While in fact you would know that (out of the fact, that the way already is in your database), the other way around it's a problem: If a node changes it's location towards your area of interest, that has been outside before, every way connected to this node is of interest for you, but these ways are neither in your database (outside your area before) nor in the change stream (as the way object itself didn't change). If you really want to pursue this further, read up on "augmented diffs" which are reference-complete and would therefore allow such filtering: http://wiki.openstreetmap.org/wiki/Overpass_API/Augmented_Diffs Bye Frederik ___ dev mailing list dev@openstreetmap.org http://lists.openstreetmap.org/listinfo/dev
Re: [OSM-dev] Wikipedia slippymap
On 05.01.2013 23:01, Minh Nguyen wrote: On 2013-01-02 4:40 AM, Svavar Kjarrval wrote: Wikipedia has implemented a Slippymap using OpenLayers sorry for the late feedback, I was offline for some days. FYI: if you need to contact somebody regarding these maps, you could (or maybe should) ask http://wiki.openstreetmap.org/wiki/User:Kolossos Best regards, Michael. ___ dev mailing list dev@openstreetmap.org http://lists.openstreetmap.org/listinfo/dev
Re: [OSM-dev] uMap Project: OSM everywhere
On 03.01.2013 22:51, Yohan Boniface wrote: sorry for the late feedback, I was offline for some days. This email for introducing the "uMap project". TL;DR: http://umap.fluv.io/ (demo site). the name umap is not very well chosen: there is already a project called uMap which exists since long time! http://wiki.openstreetmap.org/wiki/User:Speedpilgrim So it would be nice if you would change the name of your project. Best regards, Michael. ___ dev mailing list dev@openstreetmap.org http://lists.openstreetmap.org/listinfo/dev
Re: [OSM-dev] uMap Project: OSM everywhere
On 01/21/2013 11:03 PM, Michael Kugelmann wrote: On 03.01.2013 22:51, Yohan Boniface wrote: sorry for the late feedback, I was offline for some days. This email for introducing the "uMap project". TL;DR: http://umap.fluv.io/ (demo site). the name umap is not very well chosen: there is already a project called uMap which exists since long time! http://wiki.openstreetmap.org/wiki/User:Speedpilgrim So it would be nice if you would change the name of your project. I'm open to suggestions :) Yohan ___ dev mailing list dev@openstreetmap.org http://lists.openstreetmap.org/listinfo/dev
