This is really helpul Imre.....thanks a lot.
CheersSamuel Samuel Aiyeoribe
On Friday, 18 September 2015, 15:09, Imre Samu <[email protected]>
wrote:
Hi Samuel,
>makes the script to timeout.
you can "tune" the overpass query a little, but sometimes the servers
overcrowded ..
- On the script you can modify the timeout parameter
[out:json][timeout:625];- and you can modify the overpass-server to other (
stronger or less crowded instance ) [ Settings / General settings / Server:
"http://overpass.osm.rambler.ru/cgi/"; ] ( http://overpass.osm.rambler.ru/cgi/
= (8 cores, 64 GB RAM). : information:
http://wiki.openstreetmap.org/wiki/Overpass_API )
I have tried to load all higway tag from Nigeria , but probably this query is
to big for overpass.. .
sometimes help - to create a lot of smaller query - like: You can create a
query for every highway value. * highway=primary in "Nigeria"” (
timeout 425 , + meta ) -> http://overpass-turbo.eu/s/bwK* highway=secondary
in "Nigeria" ( timeout 425 , + meta ) -> http://overpass-turbo.eu/s/bwL*
...
But if you want processing "big" data , my prefered method ( on linux ) :-
downloading the raw data : http://download.geofabrik.de/africa/nigeria.html (
nigeria-latest.osm.pbf, )- and load with "osm2pgsql" (
http://wiki.openstreetmap.org/wiki/Osm2pgsql ) to PostgreSQL with (
--extra-attributes ) option. "To use the osm_user, osm_uid, osm_version, and
osm_timestamp tags, you must use the osm2pgsql option --extra-attributes when
importing."
- and analyze with SQL ( like:
https://github.com/openstreetmap/osm2pgsql/blob/master/docs/analysis.md )
Probably this is working on windows - but I not tested .. (
http://learnosm.org/en/osm-data/osm2pgsql/ ) .
cheers, Imre
2015-09-18 13:39 GMT+02:00 Samuel Aiyeoribe <[email protected]>:
Thanks Imre and Giovanni,
Imre:
I have tried out your method on overpass and it work but the issue i am having
has to do with the extent of the size of the data which makes the script to
timeout.
When i tried extracting highway for the whole of Nigeria it timed out, i
reduced it to a State it timed out too but when i reduced it to a lower
geography it worked. I need the data for a larger geography, do you think if a
have a faster internet the script can run before it timed out or do i try other
browsers as i currently use chrome.
Will appreciate your advice.
Giovanni:
I can't figure out the api method, can you please explain better
ThanksSamuel
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