Yes I agree that every country's borders on earth adds up to a lot of
data. And my last reply could have been clearer. If you look at his
original query (which is mangled now by the email), He was looking for
the NODES of each country's capital city, not the city borders.?? And
although the Argentina relation may only have 2 nodes in the relation,
there are apparently 80 other city nodes there tagged with
admin_level=2, which seems like bad tagging.
On 8/13/2019 10:21 PM, Warin wrote:
On 14/08/19 11:39, Wayne Emerson, Jr. via talk wrote:
He wasn't asking for every town on earth. Just every country's
border, and every country's capitol. I am a noob too so can't answer
his question. But I did run the wizard with "admin_level=2 and
type:node" and got 3,988 nodes. Which begs the question, why does
Argentina have dozens of admin level 2 nodes? I am guessing around 80
or so.
Each border would usually be a relation with a number of ways. Each
way will have a number of nodes to make the way.
Example
Argentina is relation 286393
https://www.openstreetmap.org/relation/286393#map=4/-40.51/-63.63
It has 2 nodes, many ways and a number of separate relations... look
at teh above link.
One of those ways is Way: Border Chile - Argentina (206446254) and
that single way has 393 nodes.
On 8/13/2019 6:30 PM, Warin wrote:
On 14/08/19 07:41, L??o El Amri via talk wrote:
Hello,
I'm trying to fetch countries, their borders, and their capitals
through
Overpass API, but the server never replies to me (With a timeout:3600
setting, the server reply with a 502 error after a while).
I'm only a beginner with this API, so maybe my request is not
efficient:
(
???? node[place=city];
this gets all cities?
???? node[place=town];
this gets all towns?
)->.a;
rel[boundary=administrative][admin_level=2]->.b;
(
???? node[place=country];
???? node.a[capital=yes];
???? way[boundary=administrative][admin_level=2];
???? .b;
???? .b >;
)->.o;
.o out body;
What am I doing wrong ? (Should I use another tool for this purpose ?)
Too much data? So it times out.
You are asking for every node of;
city 19,930
town 111,981
country 221
And then boundaries as well. 29,752
The numbers I got from taginfo.. did not bother with separating
nodes etc.
I think the boundaries will cause problems - lots of nodes and ways
in there as well as the relations.
Suggestions? Do it in small sections.
Get the cities and countries as one item and see if that works. Save
the result for later merging.
Get the boundaries for a small section of the world .. with few
boundaries and see if that works.
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