1. You need to zoom out a bunch of times. You're zoomed in very tight, in the middle of the ocean. Keep zooming out until you see something.
2. See in the bottom right how it says "29 unknown"? Your states have not been recognized. Either click that message or Map > Edit Locations and set up the country correctly.
Thank you so much. Will fix that and let you know the results.
Do you think that because I am using trial version of Tableau?
Thank you so much. Find the problem. it was not recognized the location Because somehow my country setting is Sweden but my data is US city. However, if I have the GPS data which is
However, if I have the GPS data which is direct coordinate of latitude and longitude will I have this problem?
And if I use the global city's name how could I Adjust my Map Edit location option? say I have 40 capital cities names from different countries?
Finally from your perspective do you have any suggestion about when should people using filled map and when should use the other one (have circles with diffent size)
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You should introduce a country dimension into data. Add it to the detail shelf on the marks card and you wouldn't have this problem as Tableau will interpret the city based on the combination of Country and City.
If you used a pre-defined latitude and longitude, you also wouldn't have this problem.
I don't really have an opinion on when it's best to use filled map versus circles / shapes on top of the map. I think it largely depends on what you're trying to show and what your narrative is. With that being said, I think a filled map using color to indicate the value of something i.e. Sales reads easier than the size of a circle. It's not easy to compare the size of a circle hovering over New York City against Auckland in New Zealand - they are far apart, it's difficult to get a frame of reference. But then again, if someone is color blind or has difficulty analyzing color gradients, they would probably react better to shapes and sizes.
Summary - there's a lot of rules and best practices here and your exact data and objective should determine which chart type to use.
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