Dennis Kao
@professorkao
Ramblings about maps, data visualization, Tableau Public, QGIS, etc. Social Work Professor by Day Data Viz & Map Designer by Night
Kyoto Cherry Blossom Map
33K+ views & 570+ likes across X & LinkedIn? 🤯
The response to my @TableauPublic map of Kyoto's cherry blossom sites has been overwhelming! Thank you so much!🙏
Just some random thoughts on how it (accidentally) came together... layer by layer.
#RandomQGIStoTableauStuff #21
Internal Border Lines
For a recent map I designed - after an unhelpful Google search - I figured out a way to extract just the internal border lines (no coastlines) in @QGIS...
...which I think resulted in a cleaner map in @TableauPublic
Here's my 20th #RandomQGIStoTableauStuff / #RQTS thread:
Visualizing Historic River Flows
This past week, I designed a map of the historic flows of a section of the Yellowstone River... using @geo_coe's tutorial on creating REM's w/ @QGIS
I wanted to share my workaround since @TableauPublic can't handle raster data (directly).
#RandomQGIStoTableauStuff no. 19 🧵
twitter.com/professorkao/status/1747109233445720533?s=20
Top Five Favorite RQTS Posts of 2023
At the start of the year, I started #RandomQGIStoTableauStuff, a small project showcasing some ways one can use @QGIS to enhance their map designs in @TableauPublic.
18 posts later... here are your top 5 favorites:
#5... DROP SHADOWS (Jun 17, no 10)
typefully.com/professorkao/drop-shadows-gnAzCjP
Circular Map
Hey #DataFam, here's a quick post on how you can create a circular map in @TableauPublic, using a circle drawn in @QGIS.
Basic steps:
1. Draw/create circle map layer
2. Clip your desired geographies to the circle
3. Create your map
#RandomQGIStoTableauStuff no. 18
Locator Maps
Do your readers know what/where you're mapping? Adding a small locator map can help to provide some geographic context.
But in @TableauPublic, it is challenging to scale maps accurately... One option is to draw a shape in @QGIS...
This is #RandomQGIStoTableauStuff #17! 😁
Creating a Lego-style Map of Canada
I wanted to briefly go into how I created a Lego-style map of Canada... The map basically consists of multiple layers of the point grid (created in @QGIS) & visualized as squares/circles in @TableauPublic.
Let's get started... #RandomQGIStoTableauStuff #16 🧵
twitter.com/professorkao/status/1707909033837867393?s=20
Isometric Dot Maps
During #DataPride Month (June), you may have noticed Šárka Meer's great "Love is Love..." viz & probably wondered how one might create that cool dot map in @QGIS & visualize it in @TableauPublic...
You're in luck! Here's #RandomQGIStoTableauStuff #15! 😁
shorturl.at/GKTWY
Dorling Cartograms
#RandomQGIStoTableauStuff #14
Dorling cartograms - a la Prof @dannydorling - are another type of cartogram which uses proportional circles to depict areas.
Here's one way to create them @QGIS & visualize them @TableauPublic. This time, we will use a 3rd tool!
Image: @guardian
twitter.com/professorkao/status/1687266322181189632?s=20
Cartograms (Contiguous)
For #RandomQGIStoTableauStuff No. 13, let's take a look at:
CARTOGRAMS... maps that distort/resize geographic features based on a measure. Great examples at @worldmapper.
With the "cartogram3" plugin in @QGIS, it's quite simple to create them & then visualize in @TableauPublic.