On Fri, Oct 23, 2009 at 6:13 AM, Emilie Laffray <[email protected]> wrote: > 2009/10/23 Peter Childs <[email protected]> >> I'm looking at using my own Schema and a SAX parser >> Currently our UK Streets using a high bread soundx but I am thinking that >> the double meta phone may be better. Unfrotnally the UK Streets we have are >> old and a bit out of date (and have copyright issues) hence why I want to >> move over to OSM. > > Ok, if you are interested only in UK, then maybe you might want to > concentrate on UK first.
Is there any way to keep up-to-date on a subset of the world? I can download Florida from CloudMade (http://downloads.cloudmade.com/north_america/united_states/florida), but I haven't found a way to keep this up-to-date other than 1) downloading all of Florida periodically or 2) downloading the changesets for the world and filtering them out. I'm probably planning on writing a customized parser rather than using a generic XML parser, as my experience dealing with other projects shows that doing this tends to increase performance significantly. For my database, I installed rails-port, dumped the database, and edited the dump file to fit my needs (I got rid of a bunch of the foreign key constraints, got rid of the "current" tables, got rid of the "private" tables and columns which I won't have access to, added fields like "isdownloaded" to tables like the changesets table to let me know how up to date the data is, etc.). I plan to implement the "current" tables initially as a view, and ultimately as a materialized view. I'm probably reinventing a lot of wheels, but I want access to both the current and history items (and changesets), and I want to be able to download bits and pieces as needed (*); and I didn't see any way to do this with the tools already available. (*) Alternatively, is there an easy way to download *everything*, including current, history, and changeset info, preferably just for a large subset of the world, in my case Florida? I could probably accept that, but I couldn't find the data. So, I've basically decided to implement a cache (I call the database osm_cache), and get the info from the API when it's not in the cache (and cache it). _______________________________________________ Geocoding mailing list [email protected] http://lists.openstreetmap.org/listinfo/geocoding
