1

I'm looking to map (for the sake of the example) all memorials to Lincoln in California using QGIS' QuickOSM plugin.

The query I can easily set up

[out:xml] [timeout:25];
 {{geocodeArea:California}} -> .area_0;
(
    node["memorial"]["name"="Lincoln"](area.area_0);
);
(._;>;);
out body;

looks for the exact match in the name tag. As a result, QuickOSM returns me the message Successful query, but no result, even though California definitely has a memorial with "Lincoln" in the name (the "Abraham Lincoln War Memorial" in Oakland, at least).

How do I formulate the query so that it only checks if the name tag contains this string?

I found a feature request on Github for Overpass API, and a discussion here proposing to use "LIKE", which is however apparently not working for QuickOSM:

[out:xml] [timeout:25];
 {{geocodeArea:California}} -> .area_0;
(
    node["memorial"]["name" LIKE "%Lincoln%"](area.area_0);

);
(._;>;);
out body;

returns Bad request OverpassAPI.

6
  • If it it close to plain SQL then try "'%Lincoln%'".
    – user30184
    Feb 10, 2023 at 7:34
  • Your first query doesn't return any data if you copy/paste in overpass-turbo.eu as well which is using the same database in the backend. I haven't debug your query, maybe you are not in the correct "geocoded area".
    – etrimaille
    Feb 10, 2023 at 9:18
  • @etrimaille Yes exactly, because this is the syntax for an exact match in the name tag. If I change the query to include the full name (i.e. "name"="Abraham Lincoln War Memorial"), then both QuickOSM and overpass-turbo.eu return one result (that one in Oakland). My question is about how I can search for a partial match in the name tag.
    – DK2AX
    Feb 10, 2023 at 17:08
  • @user30184 When I try this in QuickOSM or overpass-turbo.eu, I get the same message ("Successful query, but no result"), so it seems the % symbol doesn't act as a wildcard in this case.
    – DK2AX
    Feb 10, 2023 at 17:10
  • Sorry, the question was maybe not clear
    – etrimaille
    Feb 10, 2023 at 18:22

1 Answer 1

1

The solution turned out to be relatively simple: it's sufficient to replace the = with a ~. This apparently looks for partial matches.

Using the original example:

[out:xml] [timeout:25];
 {{geocodeArea:California}} -> .area_0;
(
    node["memorial"]["name" ~ "Lincoln"](area.area_0);
);
(._;>;);
out body;

now successfully returns three memorials to Lincoln in California, including the one in Oakland.

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