Notes on Tableau and Data Visualisation
The new INTERSECTS() spatial function, introduced in 2022.4, makes it possible to determine if two spatial objects overlap without needing to perform a spatial join. This post walks through a few examples with points, polygons (buffers) and lines.
This tutorial video steps through how to create flight path maps in Tableau using spatial functions including MAKEPOINT, MAKELINE and DISTANCE.
This video walks through how to perform spatial analysis by creating a spatial join between multiple data source with the help of various spatial functions, such as Buffer, MakePoint and Distance.
Spatial joins can help you explore geographic relationships between different sources of spatial data. This blog and video walk through an example in Tableau.
In this video, I step through how to use map layers in version 2021.4 to create a three-layer map with polygons, lines and points and also how to use the different map layer options.
This blog shows how you can use MapBox to create a custom background map that only shows a filtered set of countries.
Version 2021.2 sees the introduction of a new spatial function: Area. This blog and workbook include a few examples along with a couple of cautionary notes.
Mapbox recently added a data visualisation component to Mapbox Studio, which enables the creation of custom spatial data visualisations using imported data directly within Mapbox. This blog walks through how to create a map of Airbnb locations in London using the component.
With the ability to combine and overlay more spatial data, the Map Layers functionality enables a wider variety of geospatial analyses. This post walks through an example of searching for an Airbnb in London that meets different criteria.
This blog post explores using Tableau’s new Map Layers feature to create custom User Interface elements such as popup charts, viz in tooltips and custom URL links.
The new Map Layers feature allows you overlay multiple marks layers on a map removing the need to use a dual axis and opening up new possibilities for visualising multiple sources of spatial data.
If you have latitude and longitude fields in your data, you can create tooltip URL actions to open Google Maps in a browser at the exact location of those fields for any row in your data. This blog walks through how to create these links.
This post walks through how to create a basic custom Mapbox map, publish it and import it into Tableau Desktop for use as the background to a visualisation.
This blog post walks through some of the design and UX choices in making this visualisation about how different areas of the UK have responded to lockdown.
Buffer spatial functions allow you to perform trade area analysis in Tableau Desktop without any pre-processing of data. This blog explains what buffers are and how to create them.
Using a parameter as data source, this blog shows how you can draw sequential points over a grid or on a map with spatial points.
For this month's #IronQuest, I take a look at geographic data on the amazing but sadly under threat Coral Reefs of Indonesia.
This blog post looks at the new vector maps in Tableau Online in the 2019.1 beta release.
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