Calculate the AREA of your polygons in Tableau and then create charts to compare the sizes.
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- čas přidán 3. 08. 2024
- Using the AREA function in calculations enables you to build charts based on the total surface area of the polygons in your spatial files. This opens up new analytical opportunities and different ways to view and analyse your spatial data. I walk through a few examples with three different spatial sources.
💾 Data sources
OS Data Hub: bit.ly/3M7kWBg (select the ESRI Shapefile format)
Historic England: bit.ly/3so4eWD (Parks and Gardens polygons)
Natural Earth: bit.ly/3IlCmrI (Land polygons)
📃 Please refer to the usage and licensing guidance on each site before using these sources.
Open Government License: bit.ly/3BU1bZx
Natural Earth terms of use (public domain): bit.ly/35wcvyC
📊 Visualisations
London Population Density visualisation: tabsoft.co/3sonAel
Sample uses of the Area function: tabsoft.co/3hdY5pm
#30DayMapChallenge: 30daymapchallenge.com/
📑 Blog post
Area Function: datavis.blog/2021/06/29/table...
🔗 Social Media Links
Blog: datavis.blog ➝ Tableau tips and tutorials
Twitter: / datavisblog
Portfolio: public.tableau.com/app/profil...
LinkedIn: / marcreiduk
▶ Subscribe for the latest tips and tutorials: bit.ly/TableauTutorials
📌 Chapters
00:00 - Intro
00:43 - Spatial Data Sources
00:52 - Connect to data - London Districts
01:52 - Create AREA calculation
02:11 - AREA Units - miles, km, metres, feet
02:42 - Create bar chart with area measure
04:26 - Create a dashboard including a highlight action
05:35 - Connect to data - England parks and gardens
06:15 - Create AREA calculation using ACRES
06:58 - Create AREA calculation using HECTARES
07:16 - Importance of polygon accuracy with the area function
08:30 - Example created for #30DayMapChallenge
Thx Marc 👍
No problem 👍
Good Viz. Is it possible to create a map and bar chart dashboard of drought prone region of a country or vegetation or forest areas of a country. Could you please make a video on it.
If you have the drought data for those regions and the relevant shape files it should be possible. It's not something I plan to make a video right now but if you download the workbook I used (link in description) you should be able to copy the same approach. Hope it helps!
@@MarcReid Thanks a lot. Do you know any source of drought spatial data at country lavel? Thank you once again for your great viz.
No I don't, sorry. Google is the way to go.