OpenStreetMap
I recently released the first version of a mostly-complete Java implementation of the XAPI server. The source code is available on my GitHub with a readme describing generally how to get it set up.
Running this database with a full-planet requires some large, fast disks. The database is roughly 350GB and is slowly increasing:
CPU and memory usage are useful for the initial import (indexing especially), but any subsequent queries will be limited by the disk speed.
Feel free to use it! Serge W. created an XAPI UI framework that I set up at http://openstreetmap.us/uixapi/xapi.html to build the XAPI query URLs.
At the moment, the Java XAPI seems to have a problem returning relations and doesn't implement child element predicates or special tags. If you find other problems, please file a bug.
Фекер алышыу
Firefishyтарафынан26 January 2011 cәғәт 15:13көндө ҡаралған
Stats for xapi.osm.org for 25 Jan 2011:
tags:
@user= - 27 queries from 12 IP addresses.
@uid= - 3 queries from 2 IP address.
@changeset - 1 query
Harry Woodтарафынан26 January 2011 cәғәт 16:00көндө ҡаралған
You didn't actually mention the base URL for your new service: http://openstreetmap.us/xapi/api/0.6/
It works! Example: All the libraries in London : http://openstreetmap.us/xapi/api/0.6/*[amenity=library][bbox=-0.57,51.24,0.31,51.75]
Great work!
Tom Chanceтарафынан26 January 2011 cәғәт 16:24көндө ҡаралған
Great, I'll give it a go.
Maarten Deenтарафынан26 January 2011 cәғәт 16:37көндө ҡаралған
Looks promising. But the performance with large bboxes isn't there yet.
Harry Wood's example works for me, I can also download banks in a 0.2x0.2 bbox, but trying to get banks for the whole of the Netherlands does not work yet. I get a "504 Gateway Time-out" message.
My test URL: http://openstreetmap.us/xapi/api/0.6/*[amenity=bank][bbox=2.5,50.7,7.2,53.6]
iandeesтарафынан26 January 2011 cәғәт 16:42көндө ҡаралған
The machine restarted itself at 16:00UTC or so, which lines itself up with your request fairly well.
But yes, large bounding box queries are mildly slow -- I don't remember them being particularly fast on the other system, though.
Tom Chanceтарафынан26 January 2011 cәғәт 16:48көндө ҡаралған
I get the same message trying to download all power generators in the UK.
http://openstreetmap.us/xapi/api/0.6/*[power=generator][-6.5,49.68,2.67,61.31]
Just London works fine:
http://openstreetmap.us/xapi/api/0.6/*[power=generator][bbox=-0.5
1,51.20,0.35,51.80]
iandeesтарафынан26 January 2011 cәғәт 16:53көндө ҡаралған
It bounced a few more times and is down hard now. There appear to be some ECC memory errors, but I put fresh memory in a while back. Looks to be a bad motherboard. Thanks for the stress test, everyone!
Geonickтарафынан27 January 2011 cәғәт 23:13көндө ҡаралған
Is this XAPI UI really reflect the syntax of XAPI? Currently there is only one tag predicate. Isn't it possible to query more than one, like
http://openstreetmap.us/xapi/api/0.6/*[amenity=parking][capacity:disabled=*][bbox=-0.57,51.24,0.31,51.75]
Actually, even the OSM wiki leaves this question open:
osm.wiki/Xapi#Predicates
It would be nice anyhow that the wiki page get's enhanced with a real syntax definition.
iandeesтарафынан28 January 2011 cәғәт 01:24көндө ҡаралған
@Geonick: yes, this really does follow the XAPI query syntax. You can indeed supply multiple tag predicates. It will eventually be possible to include multiple bounding box predicates, but at the moment I only allow one.
Katzmanтарафынан 9 March 2011 cәғәт 21:01көндө ҡаралған
Two things:
- so the possibility to enter multiple tags is not implemented yet, right?
- is it possible to do non-case sensitive search on the values, such as icao=lklt would return any combination of LKLT, lklt, LKlt, LkLt, etc.?
Thanks!
iandeesтарафынан 9 March 2011 cәғәт 21:03көндө ҡаралған
@Katzman:
1. It is possible to enter multiple tag predicates:
[amenity=foo|bar] := "amenity"="foo" OR "amenity"="bar"
[amenity|leisure=foo] := "amenity"="foo" OR "leisure"="foo"
[amenity=foo][area=bar] := "amenity"="foo" AND "area"="bar"
2. Not at this time.
Arminusтарафынан21 March 2011 cәғәт 19:34көндө ҡаралған
Very nice ! Any updates on the relation problem ?
Tiloтарафынан31 March 2011 cәғәт 17:45көндө ҡаралған
Is the jxapi down at the moment?
I want to prevent denied download requests before the request is sent. How is it handled, if a bbox is too large? like this?
[bbox=West,South,East,North]
if difference(West,East)*difference(South,North) > 10 --> denied
if difference(West,East)*difference(South,North) <= 10 --> accepted
Is it planned to allow larger bboxes than 10 sqaredegrees in future?
Thanks!
Tiloтарафынан31 March 2011 cәғәт 17:48көндө ҡаралған
[bbox=West,South,East,North]
if difference(West,East)*difference(South,North) > 10 --- denied
if difference(West,East)*difference(South,North) <= 10 --- accepted
iandeesтарафынан31 March 2011 cәғәт 17:51көндө ҡаралған
@Tilo: No, the jxapi is/was not down. It was getting inundated with duplicate requests so the process queue was very long. I restarted postgres to clean out the queue.
I compute the sum of the areas of the requested bounding box(es) and compare that to 10. If larger, 500. If less, let it through.
There are no plans to do areas larger than 10 square degrees. As you can see already the hardware has a hard enough time keeping up.
Tiloтарафынан31 March 2011 cәғәт 17:51көндө ҡаралған
damn,
the third line was supposed to look like this (now, in words):
if difference(West,East)*difference(South,North) is less or equal 10 then accepted
Tiloтарафынан31 March 2011 cәғәт 17:59көндө ҡаралған
Great! thanks a lot.
Tiloтарафынан 1 April 2011 cәғәт 04:36көндө ҡаралған
I just tested a little smaller request than 10 square degrees with the request below (9.8 sqdeg) and ran into an Error. see the message below from http://jxapi.openstreetmap.org/xapi/admin/stats
ERROR way[boundary=administrative][bbox=8,48,10,52.9] 144 30 mins 32.909 secs
What is wrong with the request? Is there another reason for denial than the bounding box?
Thanks
Tiloтарафынан 1 April 2011 cәғәт 05:12көндө ҡаралған
this worked:
way[boundary=administrative][bbox=8,48,10,52] (221655 elements)
but this didn't:
way[bbox=8,48,10,52]
???
malcolmhтарафынан 5 April 2011 cәғәт 09:44көндө ҡаралған
Bounding boxes that straddle 180 E/W are rejected. I assume this is because West > East. Is this a bug or a feature?
iandeesтарафынан 5 April 2011 cәғәт 10:47көндө ҡаралған
This is not a good place to make bug reports. Do that here: https://github.com/iandees/xapi-servlet/issues
Langlaeuferтарафынан12 April 2011 cәғәт 19:27көндө ҡаралған
Examples for Bugs with relations.
JXAPI !causes a browser crash!: http://jxapi.openstreetmap.org/xapi/api/0.6/relation%5Bbbox=9.6,52.4,9.7,52.5%5D%5Btype=restriction%5D
or delivers noting: http://jxapi.openstreetmap.org/xapi/api/0.6/*%5Bbbox=9.6,52.4,9.7,52.5%5D%5Btype=restriction%5D
XAPI Request: http://xapi.openstreetmap.org/api/0.6/relation%5Bbbox=9.6,52.4,9.7,52.5%5D%5Btype=restriction%5D
also in this way: http://xapi.openstreetmap.org/api/0.6/*%5Bbbox=9.6,52.4,9.7,52.5%5D%5Btype=restriction%5D
iandeesтарафынан12 April 2011 cәғәт 20:05көндө ҡаралған
********THIS IS NOT A GOOD PLACE TO MAKE BUG REPORTS************. Do that here: https://github.com/iandees/xapi-servlet/issues
Langlaeuferтарафынан17 April 2011 cәғәт 12:36көндө ҡаралған
sorry, I do not like to register there!
Bryce C Nesbittтарафынан27 April 2011 cәғәт 06:59көндө ҡаралған
Great! Thanks for making progress brining xapi back to life!
It would be nice if the status page at http://jxapi.openstreetmap.org/xapi/admin/stats gave details on the ERROR, rather than simply saying ERROR.
Tiloтарафынан28 April 2011 cәғәт 02:51көндө ҡаралған
I agree with Bryce on both!
about 14 days ago this request: *[bbox=8.173,49.815,9.173,50.554] worked fine.
size 523 MB
Yesterday in the afternoon and today (at night) I always got an error. I tried 5 times each. Neither the bbox limitation of 10 sqare degrees (less than 2 sqdeg here) nor the syntax should be a problem in this request. What are the other limitations which cause an error?
Have new limitations been implemented between apr,14 and apr,28?
iandeesтарафынан28 April 2011 cәғәт 02:52көндө ҡаралған
********THIS IS NOT A GOOD PLACE TO MAKE BUG REPORTS************. Do that here: https://github.com/iandees/xapi-servlet/issues