Tag Archives: choropleth

Predicting the UK General Election Results

(To be fair, I forgot to schedule to publish this post before I left somehow.)

Your humble author is still on holiday. So, today, you can enjoy a nice interactive piece from FiveThirtyEight that predicts the results of the 7 May general election. Of particular interest, the box part of the plot that shows the 90% confidence range.

Dot plotting the results

Dot plotting the results

The piece also has a choropleth map. My only feature request(s) would be to have a zoom feature for urban constituencies and/or to have a search field that allows the user to see the predicted results for a specific constituency.

Credit for the piece goes to Matthew Conlen and Ritchie King.

Sex, Drugs, and Rock Oil

North Dakota’s economy has been booming because of shale oil. Most of that economic growth has been centred on what was the small city of Williston, North Dakota. Economic growth often leads to population growth, however, and that can at times lead to growth in less than wholesome economic activities. The National Journal took a look at the population growth in the area and what has been happening concurrently in a few metrics of the less wholesome sectors of the economy, i.e. drugs and prostitution. Turns out, they are both up.

Population growth in North Dakota

Population growth in North Dakota

Credit for the piece goes to Clare Foran and Stephanie Stamm.

Happy St. Patrick’s Day

I am unabashedly Irish-American. So, Happy St. Patrick’s Day. But, I am not the only Irish-American in America. In 2013, Trulia put together a post about the Irish in America using US Census Bureau’s American Community Survey data. The post also links to an interactive map looking at US counties by their self-reporting Irish-ness. Not surprisingly, the Northeast is the most Irish, Philadelphia is the 8th largest metro area at 14.2%.

Chester County

Chester County

Credit for the piece goes to Trulia.

Where to Catch Foul Balls

As we established yesterday, baseball is rumbling back to life with Spring Training. That means it is time to start buying tickets for games. But if, like me, you have never caught a foul ball or home run, you may want to sit in a location where you can optimise your chances. Where is that? Well, now we have an app for that, Ideal Seat, as covered by Time. It uses interactive maps of stadiums and data on where hit balls land to generate an average number of balls per game—an average of about 30 foul balls per game.

Safeco Field as a sample

Safeco Field as a sample

Credit for the piece goes to Ideal Seat.

Squaring Up London

Choropleths are not always a good idea. For example, look at election maps. Highly populated but geographically small cities appear as mere drops of ink on paper or pixels on a screen. Meanwhile, vast deserts appear gigantic empires. Nothing new there. But even within cities, these issues exist. London is one such city and one design studio has been working on a means of changing that. London Squared Map converts the boroughs of London into almost all squares of equal area. Each is placed in the appropriate space to represent geographic location. But to convey actual geography and familiarise the audience, not all squares are equal. Instead, just like the city itself, the squares are divided by a simplified shape of the Thames.

the London Squared Map

the London Squared Map

Credit for the piece goes to After the Flood.

Population Displacement in Ukraine

Ukraine continues to suffer the effects of a Russian invasion. Though we won’t call it that. This piece from Radio Free Europe looks at the displaced persons in the country. Unfortunately, it is not quite the best example of what to do.

Displacement in Ukraine

Displacement in Ukraine

The line chart looks at the cumulative number of displaced persons. But, a monthly growth or absolute number for that month would tell a different story. See below. Hint, it slowed down, and then got pretty bad again.

Monthly population change

Monthly population change

I am also not a fan of labelling every data point on the map. Maybe call out a few interesting ones, the outliers perhaps. But do we need to know to the person how many people are in Ternopil. Probably not.

Credit for the piece goes to the graphics department of Radio Free Europe.

All the Goats

Today is Friday. And that means it is time for the seriousness. So here you go, folks. Goats. All the goats. The US Agricultural Census recorded all the goats as of 2012. And so people can map that out. Thankfully the Washington Post did it for me.

Note the exclamation point

Note the exclamation point

Credit for the piece goes to the Washington Post graphics department.

The Perception vs Reality of Islam in Europe

Last week’s terror attacks in Paris highlight the tension in Europe between secular Europe and those believing in Islamist values. The Economist looked at some of the available data and noted the gap between Europe’s perception of Islam and its reality. A quick figure called out for France, French respondents thought 31% of the French population to be Muslim. The reality is a mere 8%.

Perception vs reality

Perception vs reality

Credit for the piece goes to the Economist Data Team.

Income Peak Map

Today’s post looks at peak income for the middle class. The Washington Post looked at peak median household income for each county in the United States. And for 81% of counties, that peak was over 15 years ago.

Income map

Income map

The really nice features of this piece are not actually the map, which is a standard choropleth map. Instead small multiples above the map breakdown the appearance of counties in each era bracket. And then to the right the user can compare a selected county against both the state and the United States. Overall, a very nice piece.

Credit for the piece Darla Cameron and Ted Mellnik.

The Link Between Work and Transit

The Wall Street Journal recently published an interesting article about the link between work and access to transit. They included a graphic that looked at the link between the two.

Linking the two together

Linking the two together

Credit for the piece goes to the Wall Street Journal graphics department.