This is a custom way to zoom in on your data using geospatial data and Tableau’s geospatial functions together with actions and parameters. Learn how to create a buffer zoom in a Tableau Map.
Here are the written steps:
→ In Tableau Desktop, connect to your spatial data, it needs to have latitude and longitude, in our case, it is AirBnB Listings in NYC.
→ Create a calculated field called AirBnB Location using the following formula: MAKEPOINT([Latitude],[Longitude]).
→ Drag AirBnB Location into the Tableau canvas.
→ Change Mark Type to Circle and add ID to Detail.
→ Change Color to your liking.
→ Create a Parameter called Buffer in meters as a float and add 50 to the Current value.
→ Create a calculated field called AirBnB Buffer using the following formula: BUFFER([AirBnB Location],[Buffer in meters],’m’)
→ Drag AirBnB Buffer to the canvas and add it as another Layer in the visualization
→ Change Color to your liking.
→ Add ID to Detail.
→ Right click Buffer in meters and select Show Parameter.
→ Navigate to Worksheet, Actions, Add Action and select Filter.
→ Under Run Action on select Select, under Clearing, the selection will select Show All Values.
An article by Alexandru Stăncescu – Delivery Manager @btProvider.
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