Tuesday, May 22, 2018

The 50 Most Dangerous Cities in the World


The Most Dangerous Cities in the World interactive map shows the 50 cities across the globe with the highest homicide rates in 2017. According to the map the most dangerous city in the world is Los Cabos in Mexico. Caracas is the city with the second highest homicide rate and Acapulco is third.

One of the most obvious observations to make is that all but 3 of the 50 most dangerous cities are in the continents of North America and South America. The 3 not in the Americas are all in South Africa. The 4 U.S. cities in the top 50 are St Louis, Baltimore, New Orleans and Detroit.

When browsing the map you need to click on the 'i' in the map toolbar to make the map markers interactive. Once you've clicked on the 'i' you can select the map markers to view the number of homicides in a city and its homicide rate. If you zoom in on a marker a map label will appear showing where it ranks in the top 50 most dangerous cities.

You can read more about where the data comes from and how the homicide rates are compiled on the gvSIG blog.


If you are worried about traveling abroad then International SOS provide a very basic interactive map of the travel risks for every country of the world. Their Travel Risk Map provides an overview of the travel risks in each country for medical, security and road safety.

Countries are colored on the Travel Risk Map to show the International SOS assessment of the travel risks in these three categories. The map therefore provides a very basic guide as to where it is safe to travel in the world. You should also check your government's latest travel advice as well. Many governments provide useful advice for their citizens planning to travel abroad. For example the UK's Foreign and Commonwealth Office provides up-to-date Foreign Travel Advice.

Mapping the History of the World


MappiMundi is a new interactive mapping platform for recording and exploring historical events in space and time. The ultimate goal of MappiMunid is to create a complete world atlas of historical events one event at a time.

Anybody can become a registered user of MappiMundi and use the platform to map out an historical event. Unregistered users can explore the interactive maps of historical events that have already been created by registered users.

A good place to start exploring the capabilities and available features of MappiMundi is the Atlas of World Territories and Battles throughout History. This project maps out major wars and territories in world history. You can use the timeline (directly under the map) to select specific dates in world history and the map automatically updates to show you country borders at the selected time and major battles that occurred in that date range. You can then click on the country / territory polygons or the battle markers to learn more about the countries or historical events.

There are a number of other interactive history mapping projects working on similar platforms. You can view some examples of these on this post on The History of the World - Part Three.

The New York Subway Rental Map


The NYC Subway Rental Map reveals the median rent for a one bedroom apartment in the area around every stop on the New York subway system. The map can also show you if rental rates have gone up or down at each subway stop year-on-year.

The map provides an interesting visualization of New York's affordable and non-affordable neighborhoods using a map of the city that most New Yorkers are familiar with. Every single subway stop on RentHop's interactive map is colored to show the median rent within 0.6 mile of the MTA subway station. If you select a station's marker on the map you can view the exact median rent in the area and the percentage change to the cost of renting in the area since 2017.

According to RentHop rents have dropped around many stops in Manhattan Island and Brooklyn. In fact about half of the stops in Manhattan experienced drops in the cost of renting. On the other hand many stops in the Bronx have experienced a growth in rental rates year-on-year.

Monday, May 21, 2018

How Americans Get to Work


Across the whole of the United States most people travel to work by car and on their own. Apart from a few counties around New York City, the District of Colombia, most counties in Alaska and San Juan country in Colorado most Americans prefer to commute alone and by car.

Flowing data has mapped out the most popular methods of communing in each U.S. county. The How Americans Get to Work interactive map provides a choropleth view showing the most popular method of commuting in each separate county. The blue counties on the map (in the screenshot above) show all the counties where 'Drive Alone' is the most popular method of commuting.

In a few counties around New York and in D.C. the most popular method of commuting is public transport. San Juan, Colorado is the only county outside of Alaska where the most popular method of commuting is by foot.

All the different modes of transport can be filtered on the map. Therefore you can turn off the 'Drive Alone' commuters to see which are the next most popular methods of commuting in each American county.

The Real-Time Global Air Pollution Map


AirVisual Earth is a real-time interactive map of worldwide air pollution. The map includes an animated wind layer and an animated heat map showing the level of air pollution around the world based on the Air Quality Index (AQI).

AirVisual Earth owes an obvious debt of inspiration to Cameron Beccario's Earth. Cameron's very similar interactive globe also has animated wind and air pollution layers. Earth also includes real-time aurora predictions and ocean currents.

The air pollution data for AirVisual Earth comes from thousands of EPA monitoring stations around the world. Data for the map also comes from owners of AirVisual's own air quality monitors across the globe. You can see where all these measurements come from on AirVisual's AQI Stations Map. This map shows the real-time readings from over 9,000 worldwide locations.

The Worst Drivers in Britain


The worst drivers in the UK live in Somerset & Avon. A new interactive map visualizes the number of different driving offences based on the number of registered drivers in each area of the country. The map reveals that Avon and Somerset has the worst driving record overall, with nearly 200,000 offences.

The UK's Driving Offence Hotspot map shows eight different categories of driving offence, from speeding to running lights and ignoring signs. Drivers in Somerset & Avon were caught speeding more than drivers in any other area. Drivers in London were the worst offenders of driving while using the phone (not hands free) and drivers in Scotland were the worst offenders of driving carelessly. careless driving.

The UK's Driving Offence Hotspot map provides a choropleth view for each of the eight categories of driving offence. If you select a category you can then click on areas of the UK to view how they rank for that offence, the total number of drivers who were penalized for that offence and how many offences there were per 10,000 drivers.

Saturday, May 19, 2018

101 Mass Shootings in 2018


Yesterday's tragic shooting in a Texas high school was the 101st mass shooting incident in the USA this year. You can see the locations of all 101 mass shootings on ABC 15's interactive map. The map plots every mass shooting incident so far this year according to the Gun Violence Archive's database.

The Gun Violence Archive is also the data source for Vox's interactive map of Mass Shootings Since Sandy Hook. Vox's map shows the locations of all 1,686 mass shootings that have occurred in the U.S. since Sandy Hook in 2012.


Esri's School Shootings Map concentrates only on those mass shootings which have occurred in schools. This map shows every school mass shooting since Columbine in 1999. Esri's map uses the Washington Post’s database of school shootings, which has had to be continually updated since 1999.

Esri's map is the best map of the three. It's use of scaled markers shows the number of casualties at each incident. Unfortunately, because mass school shootings have now become so common place in the USA, the Esri map could now use a timeline feature. This would enable users to filter the results shown by date to get a sense of whether school shootings in America are really becoming more frequent year by year.

The Royal Wedding Map


The UK's Ordnance Survey has released a story map which allows you to follow today's royal wedding on an interactive map. The story map includes all the important locations on this important day.

The Royal Wedding map plots Prince Harry's and Meghan Markle's movements over the course of their special day. It follows the royal couple from Windsor Castle to St George's Chapel, where the marriage ceremony is taking place. As you progress through the story the bird's-eye view map zooms and pans around the royal town of Windsor to highlight all the featured locations.

The map sidebar includes information about the happy couple, the guests and the featured locations. It also include times of when all the important events will take place on this royal wedding day. You can therefore easily follow Harry & Meghan's marriage journey on the Royal Wedding map as you watch the coverage on television.

Friday, May 18, 2018

The Plastic Polluted Pacific Ocean


Henderson Island is a remote island in the South Pacific. Nobody lives there but, despite being uninhabited, its beaches are covered in rubbish. In fact 19 tonnes of trash made up of 37 million separate pieces litter this deserted island.

In What Happens to the Plastic we Throw Out National Geographic explains how domestic plastic trash ends up polluting a remote island in the middle of the South Pacific. As you progress through National Geographic's story a background map of the South Pacific shows the levels of mismanaged municipal plastic waste produced by countries on the Pacific Ocean. Much of this plastic waste eventually ends up in the Pacific. Carry on scrolling and the map updates to show the levels of plastic waste entering the ocean from rivers in Asia and North, Central & South America.

National Geographic identify the Yangtze River as the most polluted river in the world. Most of that pollution eventually ends up in the Pacific by way of the East China Sea. The background map animates the modeled pathways of marine debris to show how the plastic from the world's rivers ends up creating the huge plastic gyres polluting our oceans.

Can You Guess the City?


City-Guesser is a fun map quiz which tests your knowledge of world cities. In City-Guesser you are shown the maps of major cities around the world. All you have to do is name which city is being shown in each map. To ensure that the game isn't ridiculous easy all the place-name labels have been removed from each city map.

If you guess correctly you proceed to the next round. Guess wrong and it is game over. You get points for each correct answer. The game keeps a record of the maximum level you reach (the number of correct answers in one game) and your highest score. Your aim therefore is to beat your own high score and your highest level reached. Or you can try and beat me. So far I've reached level 7

You might also like these other map based games:

Quizzity - point to the named locations on a map of the world.
Guess the world city from its cold war Soviet spy map
Guess the city from its bike lane map
Click that 'hood! - a geography game that tests your knowledge of city neighborhoods.