Tuesday, December 18, 2018

An Atlas of American Gun Violence

I remember the days when every other interactive map was a visualization of Starbucks outlets across America. Unfortunately these days every other interactive map seems to be a visualization of shootings in the USA.

An Atlas of American Gun Violence maps five years of American gun violence, during which time there has been over 150,000 shootings. On the map red markers show the locations of where at least one person was killed and yellow markers are used to show the locations of non-fatal shootings. The atlas includes an interesting animated tour which introduces you to the map and explains some of the patterns in American gun violence. You can use the filter controls to view shootings on the map by year, by fatal /non-fatal and by type of shooting.

The map uses data from the Gun Violence Archive, which has been collecting gun violence data for the last five years. Vox's Mass Shootings Since Sandy Hook Map also uses the Gun Violence Archive to map all the incidents of mass shootings in the USA. The Gun Violence Archive itself has a Charts and Maps section which includes a number of static maps of their gun violence data. This includes a map of all 13,998 people killed by guns in the United States so far this year.

The London Murder Map

There have been 130 homicides in London so far this year. The BBC has created an interactive map showing the location of each homicide, the date it occurred and the cause of death. London Killings: All the Victims of 2018 also includes a pen portrait of all 130 of the victims.

The BBC's interactive map uses Carto's temporal functionality to show where and when each London homicide occurred. Press 'play' and the visualization will animate through the whole of 2018 adding markers to the map by the date of each homicide. The colors of each marker indicate the cause of death. Underneath the map a histogram shows the number of murders in each week of the year. This histogram is interactive and can be used to filter the results shown on the map by date range.

The number of homicides in London has reached a ten year high this year. It would be wrong however to think that everything was always better in the past. If you want a little historical perspective then you might want to compare the BBC's map of 2018 homicides with the University of Cambridge's London Medieval Murder Map This map plots the locations of 142 murders which took place in the capital in the City of London during the first half of the 14th century.

Admittedly the 142 murders in medieval London took place over a longer time span than this year's 130 deaths. However the population of London in the 14th century was significantly lower than that of London today. What hasn't changed much is that stabbing was the most dominant form of murder in both medieval and modern London.

Monday, December 17, 2018

The Ancestry Map of America

The American Ancestry map shows the most populous ancestry, Hispanic or racial group in each census tract in the U.S. according to the U.S. Census Bureau American Community Survey, 2013-17. The map uses different colors to show you the ancestry, Hispanic or racial group (AHR) which most residents self-identify with in every census tract in the country.

In the screenshot above that pink color in the Midwest indicates German and the green color in New England shows a large proportion of the population have English ancestry. The orange color along the Mexican border shows, you guessed it, a large number of people with Mexican ancestry. If you zoom in on individual cities you can find more localized patterns of ancestry. For example in New York City you will find that Italian is the top AHR in lots of the city's suburbs. If you switch coasts and zoom in on Greater Los Angeles you will see that here many census tracts have Mexican as the most populous AHR.

If you hover over a census tract on the map you can view the actual percentage of the population who identify as the top ancestry, Hispanic or racial group in the selected tract and the percentages of the next five largest AHR groups.

You can also use the map's 'Layer' control to select individual AHR groups on the map. For example if you select 'A-Fi' and then 'Cuban' you can view all the census groups where people have Cuban ancestry. If you hover over any of the colored census tract areas you can view the percentage of the population with Cuban ancestry.

How to Make a Map Poster

Here's a quick and easy way to make a simple map poster for any location in the world. Figureground Posters is an easy to use tool for creating map posters using OpenStreetMap data.

To create your poster simply click on the Figureground Posters interactive map to select the location that you want. You can then select a size for the area that you wish to map. Figureground Posters creates circular maps so just choose the radius size that you wish to map (up to 2000 meters). When you are happy with your chosen location and radius size just click 'Make Poster'. Figureground Posters will then create a simple map of your selected area using the building footprint data from OpenStreetMap.

Once you've created your map you can then add a place-name (or any other text to your map). You can also choose between showing your map as black building footprints on a white background or white building footprints on a black background.

That's it. You can now download your finished map poster as either a SVG or PNG image.

Saturday, December 15, 2018

Breaking Through the Bronze Ceiling

You may have heard of the Guerrilla Girls, who have been campaigning against the under representation of female artists in art galleries around the world. Back in 1989 the Guerrilla Girls surveyed all the works of art in New York's Museum of Modern Art. They discovered that less than 5% of the artworks in the Modern Art Department were by female artists. While 85% of the nudes featured in those artworks were female.

Women aren't only under represented inside art galleries. You probably won't be too surprised to hear that they are also under represented in those works of art that are displayed in public spaces. For example in Budapest there are more statues of animals than there are statues of women.

Atlatszo has analyzed all the statues that are owned and maintained by the municipality of Budapest. Of the 1,173 statues in the streets of Budapest 785 depict men. Only 150 statues depict women. A large proportion of the statues depicting men are of historical figures. Only 35 of the 1,173 statues in Budapest are of named historic women. The majority of the other statues of women are unnamed nudes. You can find out where all 150 statues depicting women are on the streets of Budapest on an interactive map in Atlatszo's Data Visualization of the Hungarian Bronze Ceiling.

Women aren't only under represented in artistic memorials. They are also under represented in the very names we give to the streets in which we live. For example an analysis of the Street Names in Vienna reveals that 4,269 streets have been named for men. Only 356 have been named for women.

Geochicas have also been investigating the under representation of women in street names. Their Las Calles de las Mujeres is an interactive map which shows all streets named for men and women in a number of Spanish and Central & South American cities. A pie chart on each city's map shows the percentage of streets named for both men and women in that city.

Mapbox has also created an interactive map showing the distribution of male and female street names in major cities across the world. According to Mapping Female versus Male Street Names if you add up all the streets in Bengaluru, Chennai, London, Mumbai, New Delhi, Paris, and San Francisco only 27.5% are named after women.

Friday, December 14, 2018

Eating the World

If everyone in the world had the same diet as an average American then the Earth would soon run out of food. What we eat is extremely important in determining the amount of land required to produce our food. Livestock takes up nearly 80% of global agricultural land, yet produces less than 20% of the world's supply of calories. If every country in the world adopted the US's meat based diet then we would need 138% of the world's current habitable land area. In other words we would be incapable of feeding ourselves.

Our World in Data has created an interactive map which shows the share of global habitable land needed for agriculture if everyone had the diet of each country. The countries colored red on the map all have diets which would be completely unsustainable if the whole world adopted the same diet.

Currently around 50% of the world's habitable land is used for agriculture (77% livestock & 23% crops). The countries colored green on the map are those with diets which if adopted worldwide would allow the world to continue using 50% (or less) of habitable land for agriculture. The countries colored yellow have diets which if copied across the globe would mean we had to increase the percentage of habitable land devoted to agriculture. This could be feasible as none of these country's diets would require more than 100% of habitable land being used for producing the world's food requirement.

Where Sharks Attack

The International Shark Attack File (ISAF) has been tracking shark attacks around the world since 1958. The ISAF is housed at the Florida Museum of Natural History and is the only scientifically-generated database that documents and monitors shark attacks on a global basis.

The ISAF has released a new Unprovoked Shark Attack Interactive Map, which allows you to browse the ISAF's historical records by location, date and by shark species. The map shows where sharks have attacked humans around the globe. It is possible to filter the shark attacks shown on the map by fatal and non-fatal attacks. In the map filters (below the map) you can click on the external link icons to learn more about the different species of shark.

The ISAF Maps & Data section of the Florida Museum of Natural History includes more interactive maps about shark attacks around the world. In this section you can view regional maps which provide more localized heat maps showing where shark attacks have occurred off the coast of different countries and regions of the world.

Exploring the Life of Maimonides

Moses ben Maimon, commonly known as Maimonides, was a medieval Jewish philosopher. He is revered as one of the most influential Torah scholars of the Middle Ages. The Israel Museum and the National Library of Israel is holding a joint exhibition on the life and works of Maimonides. It has also created an interactive map which allows you to discover more about some of the unique items being displayed in the exhibition.

In There was None Like Moses you can select individual artifacts on the map to learn more about their history and their role in the Maimonides exhibition. The map shrinks the globe down to a size that reflects the world known to Maimonides in the 12th century. The map is therefore not entirely geographically accurate.

The four cartouches in the map corners allow you to learn more about Maimonides and his work. The cartouche in the bottom left corner of the map provides a link to the Ktiv - The International Collection of Digitized Hebrew Manuscripts website of the Israel National Library, where you can view the digitized transcripts of Maimonides' works and manuscripts.

Thursday, December 13, 2018

The Racial Dot Map of Australia

voomMaps has created a series of dot maps which show the distribution of racial groups in Australia's largest cities. Race Dot Maps uses 2016 census data to plot the racial classification of each person living in each census area in 14 different Australian cities.

The colors of the dots on each map indicate the racial group of each individual. If you click on the 'Legend' button on a map you can learn which racial group each color represents. The Australian census recognizes 300 different categories for ancestry. For the purposes of the Race Dot Maps these 300 categories have been aggregated into seven racial groups. To protect anonymity the dots for the different racial groups are distributed randomly within each census tract area.

After the 2011 ABS census the City Science group at Monash University created an Indigenous Dot Map of Australia. showing the distribution of Australia's indigenous population. Every dot on this map shows an indigenous person counted in the 2011 Australian census. The map shows the spatial distribution of the 699,990 indigenous Australians counted.

Indigenous Australians make up 3% of the total Australian population. Looking at the map indigenous Australians seem to make up a larger proportion of the population in the north of the country. Apparently the Northern Territory has the largest proportion (30%) of its population who are indigenous, which appears to be borne out by the map.

The City Science group has also created a Chinese Population Dot Map of Australia. This map shows the distribution of the 866,001 Australians who self identified as Chinese in the 2011 census.

Also See

The Racial Dot Map of the USA
The Racial Dot of Brazil
The Racial Dot Map of South Africa
The Racial Dot Map of Estonia

US Average Life Expectancy

Where you live can have a huge influence on how long you can expect to live. People who live in New York's Chinatown have a life expectancy of 93.6 years. However people who live in nearby Roosevelt Island have a life expectancy of just 59 years. You can discover the average life expectancy in your neighborhood on this new interactive map from Quartz.

Quartz's Life Expectancy Map reveals the average life expectancy in nearly every US neighborhood. The map uses data from the Center for Disease Control's U.S. Small-area Life Expectancy Estimates Project, which tracks life expectancy at the census tract level. If you hover over your neighborhood on Quartz's map you will discover the average life expectancy in your census tract and how that compares to the state and national average.

The average life expectancy in the USA is falling. Between 2016 and 2017, the average life expectancy in the US fell from 78.7 to 78.6 years. The CDC blames this fall on the large increase in drug overdoses and suicides. The UK is also now experiencing a similar fall in life expectancy, while not suffering from the same scale of deaths from opiate abuse as the USA. In both the US and the UK there is obviously growing health inequality, where those who who live in more economically deprived areas can not expect to live as long as their neighbors in wealthier neighborhoods.