Google SERP uule location parameter value for worldwide location You can refer this UULE geolocation for better understanding
To check in real world follow this pattern: Lets say we need to search from Pune,Maharashtra,India then its uule code is w+CAIQICIWUHVuZSxNYWhhcmFzaHRyYSxJbmRpYQ so we can search like
https://www.google.com/search?q=my+location&uule=w+CAIQICIWUHVuZSxNYWhhcmFzaHRyYSxJbmRpYQ
you will get all results from that location.
to see the location from official google data visit here: https://developers.google.com/adwords/api/docs/appendix/geotargeting?hl=en&csw=1
To download data: https://developers.google.com/adwords/api/docs/appendix/geo/geotargets-2019-05-02.csv
Thank you