Which Countries Sent the Most Athletes to Pyeongchang?

By Matt Stiles | | Topics: North Korea, South Korea, Sports

Because I live in Seoul and work as a journalist, I’m paying close attention to the Winter Olympics as they open tonight in Pyeongchang, South Korea.

I don’t know much about the Winter Games’ history, so I decided first to research which countries are here. Europe dominates:

Here’s a world map (Russia has many athletes here, but they’re not eligible for medals because of a doping scheme):

And a table, so you can look up specific countries (there are 93 in total).

Mapping the United States’ Korean Population

By Matt Stiles | | Topics: South Korea

I’ve often felt fortunate that I get to write about South Korea for the Los Angeles Times, a newspaper that’s still interested in stories related to life, politics and culture here — not just the strongman to the North.

That interest is in part because the Times remains a serious paper that’s trying to stay committed to foreign news, but also because a decent portion of its readers are Korean. The Los Angeles metro area, for example, has more than 340,000 people of Korean descent, about a fifth of the overall Korean population in the United States, according to the U.S. Census Bureau.

I’ve written before about South Korean expatriates overseas. These maps, however, show the population of all ethnic Koreans who have settled in Los Angeles and across the United States.

Let’s start with Los Angeles and a caveat: I may write for the Times, but I don’t yet know it’s geography (especially not like these fine folks).

This map shows Los Angeles County, which has about 230,000 people of Korean ancestry, according to the 2010* Census. The deep teal colors in the center of the county reflect the population of Koreatown, a neighborhood inside the city of Los Angeles. This place is legit Korean. There’s even a Paris Baguette! There are several suburban areas, such as Glendale, north of Koreatown, that also have a relatively high proportion of Korean residents.

This map shows the Korean share across the country, by county. Most counties have tiny proportions of Koreans. (My home county in East Texas had a grand total of 194 Koreans, or about 0.16 percent of its population). Other areas, such as Southern California, the mid-Atlantic coast and the New York metro area have comparatively large Korean populations.  

This map uses the same data set but a different visualization technique — proportional symbols, not shaded county boundaries. Larger symbols, or bubbles, represent a higher number of Koreans in raw figures, not proportions.

And, finally, here are two tables with the top 25 counties by both measures — proportion and population:

* I chose this data set because it was the last hard count of all Americans by the Census Bureau. The agency also conducts large, quality surveys between each decennial census, but detailed questions, such as specific ancestral or ethnic origin, can come with high margins of error at smaller geography levels. The hard count also isn’t perfect, but it’s the best we have for national county-level maps until 2020.

Visualizing More Than a Decade of North Korean Defections

By Matt Stiles | | Topics: North Korea, South Korea

Another North Korean soldier defected at the Demilitarized Zone on Thursday, causing a brief skirmish along the highly fortified border. He was the fourth solder to defect this year, including the one last month who was shot several times by his comrades before he made it to safety in South Korea.

There have been tens of thousands of defections from the communist regime since the 1953 armistice that ended the Korean War. Most don’t occur at the DMZ, a 2.5-mile buffer zone filled with landmines, guard posts and barbed wire.

Here’s a look at some of the demographics of those North Koreans who defected over the years.

This first chart shows the numbers of defectors since 2001, by gender. You can see that women have been more likely to defect — and that there was a sharp drop-off in defections beginning in 2012. That’s the year that Kim Jong Un, the grandson of North Korea’s founder, Kim Il Sung, took power. Coincidence? Probably not.

This next bar chart shows the defector counts by age groups, again while breaking out gender. It’s easier to defect when you’re young, I suppose.

And, finally, a provincial map showing where known defectors came from, with darker shades representing more defections. North Hamgyong Province had the most (more than 18,000), probably because defectors can sneak across the Tumen River — which forms about a third of the border between China and North Korea.

Testing ai2html on a North Korean Defector

By Matt Stiles | | Topics: mapping, North Korea, Policy & Politics, South Korea

A few weeks ago I wrote about the daring defection — and eventual rescue — of a North Korean soldier who barreled across the Demilitarized Zone in a truck and then ran as fellow troops fired on him. The story centers on a dramatic video of the ordeal released by United Nations command.

The video, shot the afternoon of Nov. 13, shows the soldier speeding down a road toward the Joint Security Area, a border outpost that’s been the site of military skirmishes and diplomatic talks between the Koreas, still technically at war, and the U.S.

The soldier can be seen driving in a green military-style vehicle past a North Korean checkpoint before wheeling past a monument inside the area, where soldiers from both sides of the conflict are posted in relatively close proximity. The footage is a series of videos taken from different cameras at different angle.

The video fascinated me, but I found myself wanting someone to explain the sequences more clearly, so I started crafting a graphic in my free time to annotate the defector’s journey. I tried this using the ai2html tools created by The New York Times that are built into NPR’s dailygraphics rig. After a visit to the location with United States forces last week, I’m confident the graphic is accurate. I’m less confident, unfortunately, in its storytelling, design or technical merit.

Oh, well. Your first try with a new tool is never perfect — especially when this work is just a hobby.

Try it on desktop, tablet and mobile — and let me know if you have thoughts.

Visualizing North Korea’s Missile Launches

By Matt Stiles | | Topics: North Korea, Policy & Politics, South Korea

Despite international objections, North Korea has launched four ballistic missiles in the last week, including one that flew over Japan, raising regional tensions about the rogue state’s weapons development even higher.

For those of us who live in South Korea, such provocations have become commonplace, especially since the North’s new leader, Kim Jong Un, took over after his father’s death in late 2011. They interrupt Sunday breakfasts or even national holidays, but they haven’t yet seemed like a real threat.

(Of course, they can just use their ample artillery along the border to strike Seoul, where I live).

The missile testing pace and the North’s increasingly technically ability have increased significantly in the last years, however, causing more and more heartburn in the region.

This chart shows the pace of testing over the years, including missiles that “failed” in flight:

The North has over the years developed (and borrowed) its own set of missiles, each with varying capabilities. Lately they’ve grown more powerful, though not always reliable.

Here’s how often they’ve used them, by missile type:

Since 1984, there have been at least 115 missile launches. But those tests have come from a select group of locations around the North: airfields and testing sites. Here are those tests locations, aggregated, with larger bubbles representing more launches:

And this map shows each launch in time order, with a flurry beginning in 2013. Colors change based on the missile type:

This is just a quick post, created largely because I wanted to build another proportional symbols map with D3. For a more thorough analysis, check out this post.

Teaching Data Journalism In China

By Matt Stiles | | Topics: China, Tutorials

I’ve just returned from a week in China, teaching data journalism to students from all over the country at Fudan University (sponsored by the U.S. China Education Trust).

Helped by a fabulous co-instructor, Yan Lu, we taught them about acquiring data, data wrangling, storytelling, visualization, SQL, mapping, news apps and more.

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The students, working journalists and professors, were quite impressive. Working in groups, they created several data-driven projects of their own — a few of which were publishable after just a few days’ work.

For a mapping exercise, students identified several locations by latitude and longitude.

For a mapping exercise, students identified several locations by latitude and longitude.

Students demo their project related to Chinese perception of the U.S. presidential election.

Students demo their project related to Chinese perception of the U.S. presidential election.

I love China, and it was a real honor to be invited to work with such talented group. 谢谢

FiveThirtyEight Chat On Maps: Turning The “Big” States Blue

By Matt Stiles | | Topics: Policy & Politics

The folks at FiveThirtyEight had a fun data visualization discussion during their regular election chat this week, about whether Hillary Clinton should focus on ensuring victory next month or spending more money in “red” states to expand her Electoral College map.

Nate Silver chimes in by alluding to the classic discussion about how choropleth maps of the United States in a political context can distort a story. That’s because geographically large but sparsely populated western states skew the picture.

harry: People look to the map to understand how big the victory was. We have a winner-take-all system.

micah: Yeah, if the map everyone sees on Nov. 9 is covered in blue, doesn’t that make a difference?

clare.malone: I think it’s a reasonable goal for them to want to/try to win at least one unexpected state. A spot of blue in a sea of red can be a striking visual that people walk away with.

natesilver: So should they aim for states that are physically larger because they’re more impressive on the map?

clare.malone: Hah, yes.

natesilver: So Alaska then?

clare.malone: No.

natesilver: Or not Alaska because it gets shrunken down?

harry: Is this a Mercator problem? I don’t know maps.

Good stuff.

Of course, she could always try to win like Raegan did in 1984 — and then it won’t matter how you visualize it:

New Poverty Data Show Improving Economic Conditions in States

By Matt Stiles | | Topics: Economy & Finance

Economic conditions continue to improve in America’s states, with many showing significant declines in their poverty rates, according to new survey data released recently by the U.S. Census Bureau.

About 14.7 percent of the American population had incomes last year that were below their respective poverty levels, which vary depending on household size — a significant decline from 2014.

Mapping D.C. Building Heights

By Matt Stiles | | Topics: DC

I posted yesterday about residential buildings in Seoul and South Korea. Here’s a quick look at the buildings in my previous city, Washington, D.C. Darker shades represent taller buildings:

Mapping South Korea’s Foreigners

By Matt Stiles | | Topics: Demographics, South Korea

korea-foreigners-seoul

Note: My family last year relocated to Seoul, where my wife is working as a foreign correspondent for NPR. This post is part of an occasional series profiling the peninsula’s demographics and politics.

This week I looked at the population of foreign residents in South Korea, charting national origin and geographic distribution around the country. But if you don’t live here (and even if you do) that geography can be quite difficult to absorb without maps.

So, after a year of procrastination, I finally got the courage to tackle the detailed census and geography files from the Korean Statistical Information Service (you try loading Hangul characters in a database!).