Hi DalJeanis,
Making this query optimized, can be done through several means depending on the requirement.
But the primary issue is to have a circle on the map which is 350km and changes with the lat and lon that comes through the logs. I have tried haversine and cannot get that app to work. Wondering if you have ever used it might be able to shed some light on the subject. Also I have installed Shapester app which lets me draw a circle on the map of 350km. But havent been able to make that work either, as it seems to be giving me lookup errors.
Thanks
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