OSM data query by overpass for multiple bbox

Question

I'm trying to build a query to download data (for example parks) from different bbox (can't be substituted by nominatim) by overpass-turbo. Here my query but it doesn't work:

 <osm-script output="json" timeout="50">
  <!-- fetch area to search in -->
  <union into="area">
    <bbox-query e="20" n="30" s="28" w="18"/>
    <bbox-query e="30" n="40" s="38" w="28"/>
    <bbox-query e="40" n="50" s="48" w="38"/>
  </union>
  <!-- gather results -->
  <union>
    <!-- query part for: “leisure=park” -->
    <query type="node">
      <has-kv k="leisure" v="park"/>
      <area-query from="area"/>
    </query>
    <query type="way">
      <has-kv k="leisure" v="park"/>
      <area-query from="area"/>
    </query>
    <query type="relation">
      <has-kv k="leisure" v="park"/>
      <area-query from="area"/>
    </query>
  </union>
  <!-- print results -->
  <print from="area" geometry="skeleton" mode="body" order="id"/>
 <!-- <recurse type="down"/> -->
  <print from="area" geometry="skeleton" mode="skeleton" order="quadtile" />
</osm-script>

Please help to fix it. I can't find suitable solution in documentation on wiki and here in previous questions.

Answer 1

In the non XML query language you can pass a bbox to a filter:

http://wiki.openstreetmap.org/wiki/Overpass_API/Overpass_QL#Bounding_box

I don't know if there is an equivalent in the XML. In any case, a union of such queries should work for your query:

(
node(50.6,7.0,50.8,7.3)[leisure=park];
way(50.6,7.0,50.8,7.3)[leisure=park];
rel(50.6,7.0,50.8,7.3)[leisure=park];
node(51.6,7.0,51.8,7.3)[leisure=park];
way(51.6,7.0,51.8,7.3)[leisure=park];
rel(51.6,7.0,51.8,7.3)[leisure=park];
);

OSM data query by overpass for multiple bbox

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