[Talk-ca] COMS2200 Ottawa, Carleton University

Pierre Béland pierzenh at yahoo.fr
Wed Oct 18 12:27:58 UTC 2017


Overpass peut être utilisé de deux façons pour analyser l'historique d'OSM1. DATE: État de la carte à une date précise : Exemple de James
2. ADIFF: Transactions effectuées entre deux dates. Dans l'exemple ci-dessous, j'utilise xml plutot que json comme format d'output. Aussi plutot que out body et out skel , j'utilise out meta geom pour plus de détail. Beaucoup d'infos disponibles dans le fichier. Par contre, les données ne sont pas affichées sur la carte.
Voir http://overpass-turbo.eu/s/sq6
 
Pierre 
 

    Le mercredi 18 octobre 2017 06:47:20 HAE, James <james2432 at gmail.com> a écrit :  
 
 I've gave an example to your students to find old nodes(thanks andy for synthax I forgot how to query in past)https://github.com/TraceyLauriault/COMS2200A/issues/43


On Oct 18, 2017 6:07 AM, "Andy Townsend" <ajt1047 at gmail.com> wrote:

For info, there's a bunch of stuff that you can do with Overpass to see the state of an object on a certain date, for example:

[date:"2017-08-25T00:17:06Z"];
way(300069227);
out geom;

http://overpass-turbo.eu/s/spV

Also it might be worth considering using the dev site https://master.apis.dev.openst reetmap.org/ (or even your own hosted OSM API) if you want to try an extensive test of "see what this looks like".  As James has already said, the main OSM site is constantly subject to fixes and corrections by everyone - that's kind of the point :)

For example, I used the dev API here to experiment with the mapping of drop kerbs etc.:

https://master.apis.dev.openst reetmap.org/#map=18/54.01973/- 1.04546&layers=D

Best Regards,

Andy


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