Module 2: Tableau and Geographic Maps

Hi everyone!

This week we learned about basic visualization components including points, lines (communicate direction), circles, text, coordinates, patterns, colors and chart formats such as bar charts and pie charts. There is an apparent issue with visual perception of figures versus backgrounds. 

I learned how to analyze geographic information through spatial patterns in maps, trends in graphs, and sequences in data using google dataset search in Tableau. 


I modified this large dataset to only include the counties in Florida, the total groundwater withdrawal variable, and the total population variable for ease of use in Tableau. Using this data, I wanted to learn which states had the most groundwater withdrawal for saline and freshwater indicative of the county's water use. 


From the above map, we can see an apparent trend of south eastern Florida counties having the most groundwater withdrawals. 

It seems Miami-Dade County has the highest withdrawal at 351.9 million gallons per day which is understandable being a highly populated and mainstream city. The lowest withdrawal is interestingly Lafayetta County in north western Florida at 0.2 million gallons per day.

I find it interesting that counties near open water have the highest groundwater withdrawals, while counties in the North or middle of Florida have less groundwater withdrawals. To further improve this map, I would include information on population by county and per person water use measures to understand the water use differences for decision-makers. I think a pie chart symbol on the map of different water uses by county would communicate a wider range of information. 

-Ramya's POV

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