Jouni,
If you are going to make a PoLo specific export, there are a few fields which could be removed without causing issue and making the file considerably smaller.
The bold ones could be removed and not cause issues with processing.
reference,status,name,program,dxcc,state,county,continent,iota,iaruLocator,latitude,longitude,IUCNcat,validFrom,validTo,notes,lastMod,changeLog,reviewFlag,specialFlags,website,country,region,dxccEnum,qsoCount,lastAct
Even in the extended POTA download these are the fields present and used by PoLo
“reference”,“name”,“active”,“entityId”,“locationDesc”,“latitude”,“longitude”,“grid”
So that would make the process a lot lighter.
Alan