Strange query result with union in overpass

Question

<query type="way">
<has-kv k="int_ref" v="E 40"/>
</query>
<union>
<query type ="node">
<bbox-query s="49.7688" n="50.1479" e="22.8337" w="21.9143"/>
<around radius="4500"/>
<has-kv k="place" v="town"/>
</query>
<query type ="node">
<bbox-query s="49.7688" n="50.1479" e="22.8337" w="21.9143"/>
<around radius="4500"/>
<has-kv k="place" v="city"/>
</query>
<query type ="node">
<bbox-query s="49.7688" n="50.1479" e="22.8337" w="21.9143"/>
<around radius="4500"/>
<has-kv k="place" v="village"/>
</query>
</union>
<print/>

The following query should return all the nodes with k value town, village or city withing the given bound box and no more further than 4500 from way referenced E 40. However in xml result there is no "city" values. When I cut out <union> with "town" and "village" query and search only for those with key value "city" then the result is ok . I wonder what is the reason. Regards

Answer 1

The "around" block in each query is relative to the preceding statement. The query block for "town" looks around the "E40". The next query block looks around the results of the "town" query block and so on. One solution would be to use a variable instead, i.e.:

way[int_ref="E 40"]->.e40;
( node(49.768,21.914,50.148,22.834)(around.e40:4500)[place=town];
  node(49.768,21.914,50.148,22.834)(around.e40:4500)[place=city];
  node(49.768,21.914,50.148,22.834)(around.e40:4500)[place=village]; );
out;

This is the query you probably intended.

The other, and probably more efficient solution is the one from the comment of baghaii.

Strange query result with union in overpass

Follow this question

Related questions