topic Re: OpenStreetmap tag as label in Developers Questions

OpenStreetmap tag as label

JussiLehtonen — Fri, 28 Aug 2020 04:35:52 GMT

Hello

I am trying to use an Arcade -expression to create house number labels for building polygons downloaded from OpenStreetMap. OSM has the building number in "Tags" -field among several other tags. I have been trying multiple approaches where I pick the phrase "housenumber" and then return any characters after that before the closing marker.

I guess the closest I got was to Split the text but I get an error when trying to return arrays other than [0].

The "housenumber" -tag is not always the last tag so counting characters from the end does not work.

Here's how the original "Tags" -field looks like

"osm_uid"=>"38239", "building"=>"terrace", "osm_user"=>"Daeron", "way_area"=>"1.26619e-07", "addr:street"=>"Kantakyläntie", "osm_version"=>"4", "osm_changeset"=>"13506017", "osm_timestamp"=>"2012-10-15T13:31:04Z", "addr:housenumber"=>"7"

What I would like to label is just the

7

The house number can be anything between 1 and 5 characters such as "13-15"

Re: OpenStreetmap tag as label

XanderBakker — Sun, 12 Dec 2021 05:16:41 GMT

Hi jussi.lehtonenesri-fi-esridist ,

Have a look at this Arcade example taking as input a static string, but it should work point it to the tag field:

var tag = '"osm_uid"=>"38239", "building"=>"terrace", "osm_user"=>"Daeron", "way_area"=>"1.26619e-07", "addr:street"=>"Kantakyläntie", "osm_version"=>"4", "osm_changeset"=>"13506017", "osm_timestamp"=>"2012-10-15T13:31:04Z", "addr:housenumber"=>"13-15","someotherdata"=>"oops"';
var index1 = Find("addr:housenumber", tag);
if (index1 > -1) {
    var index2 = Find("=>", tag, index1);
    var index3 = Find(",", tag, index2);
    if (index3 == -1) {
        // last data in string
        var housenumber = Right(tag, Count(tag)-index2-2);
        var housenumber = Replace(housenumber, '"', '');
        return housenumber;
    } else {
        // there is data after the housenumber
        var housenumber = Mid(tag, index2+2, index3-index2-2);
        var housenumber = Replace(housenumber, '"', '');
        return housenumber;
    }
} else {
    return "";    
}
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Re: OpenStreetmap tag as label

JussiLehtonen — Fri, 28 Aug 2020 16:38:49 GMT

Works perfectly, when pointing to the field. Thanks Xander Bakker