Why is 36e8 added to osm_ids

[erkanyildiz]

city-roads/src/components/FindPlace.vue

Line 141 in 64c5867

areaId: row.osm_id + 36e8

I see 36e8 is added to osm_ids on Nominatim API results. Can you explain the rationale behind this?

[anvaka]

That's because we need overpass areas, not osm ids when we query all roads within an area. Relationship between areas and osm id is documented here: https://wiki.openstreetmap.org/wiki/Overpass_API/Overpass_QL#By_area_.28area.29

By convention the area id can be calculated from an existing OSM way by adding 2400000000 to its OSM id, or in case of a relation by adding 3600000000 respectively.

[erkanyildiz]

I see. Thank you very much.
Should we replace it with a const and add an inline note?

[anvaka]

Sounds like a good idea!

[anvaka]

This is done now.