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In terms of Tableau 'generating' Long/Lats from IPs (as it does for Zipcodes, Cities...etc.) then unfortunately not...You can however create your own geo-coding, which the following article shows how
however, my experience with custom geocoding, and especially if there are many geocode entries is that it can be fairly slow performance wise. In the UK, we only get 'Generated' Long/Lats for the 1st part of our Postcode (there are around 4k of these). This means they are 'approximate' long/lats. I did try using custom geo-coding to bring in all the Postcodes, from an external file (around 1.5 Million Postcodes) and it was really slow. So I tend to opt to load in the Long/Lats as part of the ETL process (this way only bringing in the Postcodes, and their Long/Lat that are in the data rather than have all 1.5+ Million loaded as part of the geo-coding).
Hope this is helps.
Hi Simon, very useful your answer. Thanks a lot.
Simon, I marked your answer correct, as your reply has been useful for the OP but also for others viewing this thread in the future.