Thursday, March 23, 2017

A World Map Without Highways


During the 2012 London Olympics the streets around my home were closed to traffic. For over a month I got a wonderful glimpse of a world without noisy, polluting combustion engines. As I walked around the car free streets I would often imagine what the neighborhood would look like if all the tarmacked roads could be replaced with green grass and flower beds. Unfortunately once the Olympics were over the streets were reopened and I never got the chance to replace all those ugly roads.

If the idea of a world without highways appeals to you then you will probably like No Highways NYC. Jeff Sisson's new site allows you to see what your local map would look like without all those ugly highways. The name of the map is a bit of a misnomer as it actually works for any location in the world (not just New York!).

Use the map's search facility and you can view the map for any location in the world with the 'highway' layer removed. This is possible thanks to Mapzen's ability to add or remove different map elements. This allows No Highways NYC to provide a handy little button which allows you to view the map with or without highways.


If the thought of a world without cars and highways makes you uncontrollably angry then ignore Jeff's map and head over to the Connectivity Atlas instead. Here you can view a world map which consists only of roads.

Street View in the Year 2050


Select a location on the Earth 2050 3D globe and you can get a little glimpse into the future. Kaspersky Lab has brought together some of the world's top scientists and futurologists to provide an insight into how the world might look in the year 2050.

Using the Earth 2050 futuristic looking 3D globe you can explore how various locations around the world might look in the future. Many of the locations featured on the globe even have Street View scenes providing 360 degree panoramas predicting the location in the year 2050.

If you have your own prediction about the world in 2050 you can add it to the map. Kaspersky Lab even provide instructions on how you can create your own future Street View panoramas. If you don't have your own predictions about the future you can still contribute to Earth 2050 by voting on whether you agree or disagree with the individual predictions shown on the map.

Wednesday, March 22, 2017

The Noisy America Map


Nearly one in ten Americans live with road and aviation noise that is as loud as a noisy garbage disposal (80 decibels or more). You can find out what noise levels are like where you live on the Department of Transportation’s new National Transportation Noise Map.

Using the National Transportation Noise Map you can view a heat map of road and aviation noise levels for your town or city. The map essentially visualizes the likely exposure of locations to aviation and highway noise. Therefore the map clearly reveals the location of the busiest roads and the location of noisy airports.

I bet you can easily pinpoint the location of  Los Angeles International Airport on the screenshot above. I bet you can even spot where the runways are and in what direction they run. If you want to check your guess you can turn off the noise layer on the National Transportation Noise Map and view the area on the map's satellite imagery layer.

The Building Age Story Map


I really like building age maps. Multi-colored building footprints nearly always make really beautiful looking maps. But building age maps don't just look good. They also have interesting stories to tell about where a city's oldest buildings still exist in the city's streets.

Most building age maps leave the users themselves to find these stories in the patterns of the colored building footprints on the city map. One way to improve a building age map therefore would be to pick out some of the implicit stories in the history of a city's buildings in the map itself. You could do this by creating a story map from a city's building age map.

This is exactly what CBC has done with their Montreal Building Age map. Using the Montreal is 375 years old, but how old are its buildings? interactive map you can view the age of all Montreal's buildings. However the map is also used to explore the architecture and history of thirty of Montreal's most emblematic buildings.

As you scroll through the Montreal Building Age story map CBC pick out some of Montreal's most interesting buildings on the city's map. The text panel is then used to show photos of the highlighted buildings and to explain each building's historical & architectural importance.

The result is that CBC's map is much more than just an aesthetically pleasing building age map of Montreal. It is also an interesting introduction to the history of Montreal itself and a guide to where you can still find that history on the city's streets.

Tuesday, March 21, 2017

The Geography of Murder


In 2015 there were over 13,000 gun murders in the United States. Those murders weren't distributed equally throughout the country (even if you normalize the data for population). In fact 26% of gun homicides in 2015 took place in just 1,200 neighborhood census tracts, home to just 1.5% of the population.

The Guardian has used data from the Gun Violence Archive (GVA) to plot the locations of 2015 gun homicides down to the census tract level. In the article Want to fix gun violence in America? Go local The Guardian uses a series of maps to show the neighborhoods in different cities where gun homicides most frequently occur. It then uses census data to determine factors which are common to many of the 1,200 census tracts where gun homicides are most common.

The Guardian's maps show the distribution of gun homicides within cities. The city maps also show the levels of educational attainment, poverty and the percentage of the population which is black in each census tract in the city. From mapping 2015 gun homicides The Guardian says that gun violence "falls heaviest on neighborhoods already struggling with poverty, unemployment, and failing schools. The unequal burden of violence is also marked by intense racial disparities".

You can read more about the data used in The Guardian's maps in Mapping US gun murders at a micro level: new data zooms in on violence. You can also download the data if you want to try visualizing 2015 U.S. gun homicides for yourself.

Comparing New York Neighborhoods


You can learn a lot about New York's neighborhoods on DATA2GO.NYC. The DATA2GO.NYC mapping and data tool allows you to access federal, state and local data concerning the economic well-being of all of the city's neighborhoods. Using the tool you can view information in many different areas, such as educational attainment and average incomes in each New York neighborhood.

Using the DATA2GO.NYC interactive map you can view information on over 300 different indicators, in areas such as education, demographics and the economy. If you select an indicator from the map's drop-down menu you can view a choropleth view of that data on the city map. If you select any of the neighborhood's on the map you can also view how it compares to all other New York neighborhoods for the selected indicator on an accompanying chart view.

The DATA2GO.NYC mapping tool can provide a real insight into individual neighborhoods across a range of different indicators. It also allows you to compare how individual neighborhoods compare to the rest of the city across these same indicators.

Monday, March 20, 2017

The Worldwide Waste Map


The University of Leeds and the International Solid Waste Association have created an interactive map which explores & visualizes issues around municipal waste management across the globe. The Waste Atlas includes information about landfills, dumpsites and waste management in 164 different countries and 1,779 different cities around the world. Using the map you can compare and contrast the amount of waste generated by different countries & cities and how well they manage that waste.

Using the atlas you can compare the waste management data of countries around the world. Select a country on the map and you can view details on its annual waste generation and data on waste collection & recycling rates. If you click on the City Data link in the map menu you can view the same data for 1,779 cities around the world. As well as the map view Waste Atlas includes a number of static maps and charts which also visualize data about waste management in countries & cities around the world.

Mapping the History of Latin America


HGIS de las Indias is a historical-geographical information system for Latin America. The map provides a way to explore and discover information about the historical geography of Latin America from 1701 to 1808.

HGIS de Las Indias includes a number of map layers which allow you to explore historical data on the interactive map. These layers include a collection of 19 georeferenced vintage maps of Latin America, which can be overlaid on top of the modern map of the area.

The map also includes a number of historical data layers. For example it includes data from historical censuses carried out in the region during this period. Other layers allow you to view historical shipping & mail routes in Latin America and information on eighteenth century universities and publishing companies.

Mapping China's Polluting Factories


Air pollution is a huge problem in China. Last year the American Association for the Advancement of Science reported that in 2013 air pollution killed 1.6 million people in China. One of the major causes of air pollution in the country is the large number of coal burning factories throughout China.

You can now see who the major air polluting culprits are in China on a new map of air pollution. The Institute of Public & Environmental Affairs' National Air Emissions interactive map shows the average hourly polluting rates of enterprises across China. Using the map you can find out which factories are responsible for the worst air pollution.

4,637 enterprises are being monitored in total. Each enterprise's map marker shows the latest recorded average hourly polluting value (mg/M3). You can also select a business' marker on the map to view more details, such as historical readings and how those readings relate to regulatory standards. The map's search facility includes options to filter the results shown by type of pollutant and to show only those factories exceeding or meeting regulatory air pollution standards.

Sunday, March 19, 2017

Safe Walking in Melbourne


In the USA a number of cities have introduced Vision Zero projects. Vision Zero initiatives look at the causes of traffic accidents and where they most happen. They then implement policies to try to make those streets safer for pedestrians, cyclists and other road users.

In Australia the city of Melbourne has WalkSpot. In this project Victoria Walks and CrowdSpot are working together to discover where pedestrians feel safe and unsafe when walking in Melbourne. Using the WalkSpot interactive map anyone can 'Add a Spot' at any location in Melbourne where they think there are road safety issues affecting pedestrians.

The WalkSpot interactive map can then be used by local and state government to identify trouble spots and to help road management agencies improve the streets for pedestrians.

In the USA you can view examples of the Vision Zero initiatives at Vision Zero Boston, Vision Zero New York and Vision Zero San Francisco.

Saturday, March 18, 2017

City Journeys with Scrolling Street Views


A few year's ago the Swiss broadcasting company SRF created a great web documentary about the Langstrasse district in Zurich. A similar web documentary has now been created for the Bloorcourt neighborhood in Toronto. Both these web documentaries provide seamless journeys through the city streets using connected 'Street Views' and video interviews with the inhabitants of both districts.

360 Langstrasse is a truly impressive website which allows you to move up and down Langstrasse, Zurich by simply scrolling up & down within your browser. 360 Langstrasse doesn't use connected still photos of Langstrasse to achieve this scrolling presentation. The effect is actually achieved by using a video. As you scroll up and down the page you are in fact just moving between the different frames in a video of the street and surrounding district.

A similar effect is used in The World in Ten Blocks. Images and sound from the Toronto district are explored in a stop-motion like manner as you scroll up & down in your browser. As in 360 Langstrasse a number of interactive elements can be accessed from the scrolling street views, These include videos of Bloorcourt inhabitants, text introductions to the area and old & new photographs of this Toronto neighborhood.


Pregoneros de Medellín is another wonderfully immersive virtual journey. This scrolling web documentary introduces you to the colorful streets of Medellín in Colombia.

While you stroll around Medellin you can listen to the sounds of the streets and the street vendors. You can also interact with some of the characters you find on your journey. The interactive characters are indicated on screen with map markers positioned above their heads. Click on the markers and you can view short documentary type videos about the selected individual's lives.

Obviously creating these kinds of immersive journeys around city neighborhoods can be a bit of a technical challenge. You can read about how the Medellin video was captured (using a GoPro camera attached to a gimbal and fixed to a bike), how the immersive sound was added (customizing Sounds of Street View) and how the video interface was created, in this blog post.

Friday, March 17, 2017

The 3D Building Age Map


A new map of the Morningside Heights neighborhood in Manhattan shows the age of every building in the historic district. A building age map of New York isn't exactly new. In fact you can view the age of every New York City building on the New York Building Age map. However the Morningside Heights Historic District Explorer not only shows building age but also allows you to view historic photographs of the featured buildings.

The Morningside Heights Historic District Explorer interactive map provides a 3D view of New York's buildings. The actual buildings within the Morningside Heights historic district have also been colored according to the period of their construction. You can click on the individual colored buildings to find out the exact year of construction. If you select a building on the map you can also view details on the building's architect, owner and height. You can also view historic photos of the building from the tax office.

Thursday, March 16, 2017

Eucalyptus, Sheep & Desert


Most of Australia is desert. The bits that aren't desert are populated by sheep and eucalyptus forests.

I discovered these interesting facts from some old Australian maps featured on ABC's But where is the green sheep? Old maps put the art in cartography. The ABC article features some great examples of vintage maps from the National Library of Australia's collection. The static maps include a number of cartographic illustrations of Australia's vegetation, livestock and climatic conditions.

Towards the bottom of the ABC article are a number of interactive versions of vintage maps from the NLA collection. These interactive maps include a 1940 map of Aboriginal tribes and a map showing the routes taken by some of the earliest European explorations of the Australia.

The Rise of American Anti-Semitism


ProPublica has logged more than 330 incidents of anti-Semitism, which took place in just three months, from early November to early February. Even more worrying is the fact that in 2017 there has already been 145 bomb threats made against Jewish organizations in the USA. ProPublica has mapped both Reports of Swastika Graffiti and Bomb Threats to Jewish Community Centers and Organizations.

The Bomb Threats visualization uses a static map to show the locations of all 145 bomb threats. Beneath the large map is a timeline of each of the incidents (with the most recent first). Each date in the timeline also includes a smaller static map showing the locations of the bomb threats made on that date.

The Reports of Swastika Graffiti map uses a simple story map template. You can read about some of the mapped reports by using the 'back' and 'next' buttons. Unfortunately the map itself has had all its interactivity turned off. This means that you can't zoom and pan the map or click on the markers to learn more about each of the mapped incidents. However you can learn more about some of the incidents and the rise of anti-Semitism in the United States in ProPublica's article In an Angry and Fearful Nation, an Outbreak of Anti-Semitism.

Wednesday, March 15, 2017

Satellite Image Explorer


There are now a number of different web services which allow you to browse and search for satellite imagery of the Earth. Websites such as Planet ExplorerLandsat Lens and Google's Timelapse permit you to search for satellite imagery both by location and by date. You can now also use ESO's Land Viewer service. The Earth Observing System's Land Viewer application allows you to browse and download historical satellite imagery from the Sentinel-2 and Landsat 8 satellites.

The Land Viewer search facility includes options to search for satellite imagery of the Earth by location and by date. It also includes filters which permit you to search for day or night-time satellite images and the level of cloud cover and the degree of sun elevation in the returned satellite images.

Land Viewer includes a number of band combinations which permit you to view the imagery using 18 different filters. These include natural & false color, infrared and panchromatic filters. There is also the option to apply your own custom filters to the satellite imagery.

Tuesday, March 14, 2017

Safer Cycling with Mapzen


Mapzen's new Bike Map can help you navigate a safer way to cycle. The Bike Map colors roads and bike paths based on three different tiers of safety, allowing you to tell at a glance which roads are the safest for cyclists.

The three tiers are:
  • Green (safest) - off road bike paths
  • Orange (less safe) - on road bike lanes
  • Blue (least safe) - no bike lanes
As well as grading the safety of bike routes the Bike Map also includes special bike icons to show locations that are useful for cyclists. These include bike parking, bike rentals, bike repair stations, bike shops, drinking water, toilets, cafes, and pubs.

The Bike Map uses data from Open Street Map. This means that the map works for anywhere in the world. It also means that if you don't think the map is accurate enough in your area you can improve the map by contributing to Open Street Map.

If you want to use the Bike Map in your own maps you can! You just need to add the Walkabout basemap style to a Tangram map and turn on the bike tier data. The Mapzen Blog has more details on how to add the Bike Map to your own maps. It also has more details on how the map was designed and the other biking features that you can find on the Bike Map basemap.

3D Tube Times


3D mapping library eeGeo uses WebGL to provide stunning 3D interactive maps. The eegeo.js API is based on Leaflet.js so it is very easy to use for anyone familiar with any of the most popular mapping platforms.

If you want to get started using eeGeo then you will want to check out the eeGeo API documentation. You might also want to have a look at this tutorial on Building Gorgeous 3D Maps with eeGeo.js. The tutorial provides a step by step guide to creating a 3D map. It also shows you how to add polylines to show the London Underground network on the map. Finally it uses the Transport for London API to add live underground train times to the London Underground stations on the map.

The completed map allows you to hover over any London Underground station to view live train times. It also shows all the London Underground network lines using colored polylines (using the TfL color scheme).

Monday, March 13, 2017

Drive Time with Iscoscope


This year Maps Mania has already featured a number of interactive maps which help you visualize how far you can travel for a specific period of time. These isochrone maps include farfrom.io, walkshed.js and TravelTime.

Of course how far you can travel can be constrained by the time of day when you travel. When traveling by public transit you might be able to travel further during busy commuting times if your transit network runs a more frequent service during these times. Conversely you probably can't drive as far during the rush hour due to the increased amount of traffic on the roads.

Isoscope is a driving time map which takes into account the time of day when you travel to visualize how far you can drive in a defined period of time. Enter your location into Isoscope and it will present you with an isochrone map showing how far you can drive for every hour of the day. The map features 24 layered polygons, each of which represents a different hour of the day. You can use the control panel to highlight the isochrone layer for any particular hour of the day. You can also adjust the map to take into account the different days of the week.

How Satellites Document Our Changing World


The satellite constellation of Earth-imaging company Planet Labs is able to provide a regular complete view of Earth at 3-5 m optical resolution. You can now explore these satellite images on their new Planet Explorer map.

Planet Explorer allows you to observe how the world has changed over the last year. Using the map's timeline you can zoom-in on any location on Earth and view the satellite imagery for any month, going back to January 2016. If you register with Planet Labs you can even view the daily updates to the satellite imagery in California.

Currently Planet Explorer has global satellite imagery at a resolution of 30 to 40 meters. The United States however is available at 3 to 5 meter resolution.


The Landsat program has been capturing satellite imagery of the Earth since the early 1970's. This means they now have access to over 40 years of satellite imagery, which is a wonderful resource for documenting changes to our planet.

Landsat Lens allows you to explore how the Earth has changed by comparing Lansat satellite imagery from six different years. The map allows you to search for any location on Earth and then overlay satellite imagery of your selected location from 1975, 1990, 2000, 2005, 2010 & 2015.

For example the screenshot above shows a map of the Aral Sea with four different satellite images from four different decades. Being able to directly compare the satellite images from different decades really helps to highlight the scale of how quickly the Aral Sea is disappearing.


You can also explore our ever changing world on Google's Timelapse map. Timelapse allows you to create a timelapse sequence from satellite images (from 1984 to 2012) for anywhere on Earth.The application comes with a number of default views that allow you to view timelapse animations of satellite images showing the sprawling growth of Las Vegas, the building of Dubai, the shrinking of the Mendenhall Glacier and the drying-up of Lake Urmia.

Where Can You Afford to Live?


The UK government's Living Wage is £9.75 an hour in London. This is the lowest amount that an employer in the capital is allowed to pay an employee. Unfortunately if you need to rent a property in the capital you need to earn at least £54.54 an hour.

In the rest of the UK the Living Wage is £8.25. This is almost enough to afford to rent a property in the cheapest city in the UK. In Bradford you need to only earn £8.98 to rent. This is almost affordable.

You can view how much you need to earn an hour to rent in any UK postcode area on Web-Blinds new interactive map. The Earnings vs Postcodes map allows you to enter any UK postcode to view the hourly rate that you need to earn to afford to rent in that postcode & surrounding postcode areas. The hourly rate is based on a single person working a 37.5 hour week with the rent being 35% of the total income.


If you want to buy a property rather than rent then you can check out the Guardian's Unaffordable Country interactive map.  This map shows you where you can afford to buy a property in England and Wales based on your annual income.

If you earn the national average wage in England or Wales then you can not afford to buy a house in 93% of the country. That's right you can't afford to a buy even the smallest, worst kept properties, almost anywhere in the entire country. Don't worry though, if you do well and manage to raise you income to twice the national average salary then you just might be able to afford a house in one of the country's poorest neighborhoods

Unaffordable Country is a choropleth map which colours postcode areas based on the affordability of properties in the area. Type in your average salary and the map will show you all the areas where you can afford to live - or, as is more likely, all the places in the country where you can't afford to live.

Friday, March 10, 2017

The Dot Map of Education


Educational Attainment in America is a dot map showing the level of education of people across the USA. Using the map you can zoom in on any town or city and see the local distribution of educational attainment.

The map shows five levels of educational attainment; Less than High School, High School, Some College, Bachelor Degree and Graduate Degree. Each dot represents 25 people. The map doesn't have any information attached about the data used but, based on the cartographer's previous Mapping Immigrant America dot map, I'm guessing that the data is randomized within each census tract.

It is interesting to compare the density of the different levels of educational attainment with the density of different immigrant populations using the two different dot maps. You might also be interested in comparing the Educational Attainment map with the University of Virginia's Racial Dot Map, which shows the density of different racial groups across the USA.

Thursday, March 09, 2017

Searching Satellite Imagery


Last year Terrapattern released a visual search engine for satellite imagery. Terrapattern uses machine learning to find locations around the world which look very similar. This means that you can use Terrapattern to find other locations which share a visual resemblance to a chosen location. For example, if you click on a baseball field on the Terrapattern map you can find other locations which also have a baseball field.

Descartes Labs has now released their own visual satellite search engine which allows you to search for objects around the world. Geovisual Search works in a similar fashion to Terrapattern. To search for similar looking locations around the world you just need to click on an interactive map and the search engine almost instantly finds other locations around the world which look the same.

You can learn more about how Geovisual Search uses artificial intelligence to search satellite imagery on this Descartes Labs about page. In this initial launch Geovisual Search searches three different sets of satellite imagery; Landsat 8 (global), NAIP Aerial Imagery (USA) and PlanetScope (China).

Via: Google Earth Blog

Precog Crime Prediction for London


A new interactive map claims to be able to predict the number of crimes that will be committed in London neighborhoods in 2017. Dataiku's London Crime Prediction Map 2017 shows the predicted number of crimes and whether the number of crimes is expected to rise or fall in 2017 in each London neighborhood.

The circles on the map represent the predicted number of crimes in each Lower Layer Super Output Area (LSOA). The size of the circles represent the number of crimes and the color shows the percentage change in the number of crimes compared to 2016. You can click on a neighborhood's circle to view the number of predicted crimes in the area for each month in 2017.

You can learn more about how Dataiku built their predictive model for London crime in their Predicting London Crime Rates Using Machine Learning article. A very basic summary of the model is that it uses historic London crime data, census data, information about the number of points of interests in an area (such as shops and pubs) and the location of police stations.

Wednesday, March 08, 2017

Live Talks for International Women's Day


For International Women's Day Facebook is hosting live broadcasts from across the globe. The event features live videos from "influential leaders, public figures and NGOs".

The best way to find out which events are being broadcast right now is on Facebook's #SheMeansBusiness website. The site features an interactive map showing the locations of the live broadcasts happening today. Any broadcasts that are happening at this moment are shown on the map with an animated flashing map marker. If you click on a flashing marker you can watch the live broadcast directly from the interactive map.

If you've missed a scheduled broadcast or it isn't yet live the map marker provides a link to visit the selected organization's Facebook page.

LEGO Maps of the World


The LEGO-IFER is a simple but essential tool for turning the world into a Lego-ified map, a map consisting entirely of colored plastic bricks.

To create your own LEGO map just use the LEGO-IFER's Esri map to zoom-in on your location and press the 'LEGO-IFY it' button. That's it. You now have your very own LEGO map. You can adjust the size of the map using the three yellow brick buttons beneath the Esri map. You also have the option to switch between a map and satellite view of your chosen location.


If you can turn LEGO into a map then why not turn Street View into LEGO. Brick Street View does just that, re-imagining Google Maps and Google Street View as they might appear in Legoland.,

Type your address into this Legoized Google Map and then drop the LEGO Pegman onto your street and you can actually view your house as it might look if it was built with little plastic bricks.

Brick Street View is the work of Einar Öberg, the creator of the awesome Urban Jungle Street View, which allows you to see your street transformed into a jungle. Brick Street View makes use of the same undocumented depth data stored in Street View. Both apps use that data to create a depth map which can be used to plot geometry and sprites in the 3d space of the Street View panorama.


Mapzen's free Vector Tile Service, which complements their Tangram WebGL map renderer, has also been used to create a LEGO map.

This LEGO Style map is made out of colored plastic brick textures, creating a LEGO map of the world. When panning around on the map notice how the perspective on the 3d buildings changes depending on your point of view.

Tuesday, March 07, 2017

The Breath of the Wild Map


If you are struggling to lead Link around the vast Kingdom of Hyrule in the latest incarnation of The Legend of Zelda then you might want to use these interactive maps. In the Breath of the Wild the world of Hyrule is reportedly twelve times as large as the game world in The Legend of Zelda: Twilight Princess. Sp you just might need to consult these maps.


Zelda Dungeon's interactive map of Breath of the Wild uses the Google Maps API to help you find your way around Hyrule. The map includes categorized map markers showing you the locations of important places and collectibles in the game. It also includes map labels and a handy search facility which can help you navigate around the map.

IGN's interactive Breath of the Wild map is similar to the map from Zelda Dungeon. It also includes categorized markers, map labels and a search facility. IGN's map of Hyrule appears to have been created using the Leaflet.js mapping library.

Visually Impaired Street View


Do you know how it feels to be visually impaired? See Now can't tell you how it feels but they can give you an insight into how the visually impaired see the world with their Sight Loss Simulator.

See Now's Sight Loss Simulator uses Google Maps Street View to show you how the places you are familiar with might appear if you suffered from cataracts, glaucoma or retinopathy. Enter an address into the Sight Loss Simulator and you will be shown the Google Maps Street View for that address. However the image will be obscured to show you how the scene might look to someone who suffers from a visual impairment.

Each Street View scene is displayed with three options. These options allow you to view the Street View as the location might look to someone suffering from cataracts, glaucoma or retinopathy. Each scene also includes a 'Take Action' button which leads you to more information about visual impairments and a request to sign a See Now petition.

See Now is an international development organization dedicated to ending avoidable blindness.

Monday, March 06, 2017

How Healthy Are Your Neighbors?


The people of Gary, Indiana like to play Russian roulette with their health. According to a new interactive map from the CDC Gary has the worst problems with smoking and physical activity of the largest 500 cities in America.

The Center for Disease Control and Prevention has mapped the health of 500 of the largest cities in the USA. Using the CDC map you can view the prevalence of health and unhealthy behavior down to neighborhood level. The purpose of the 500 Cities project is to "help develop and implement effective and targeted prevention activities (and) identify emerging health problems".

Using the 500 Cities interactive map you can view model based health estimates of neighborhoods at census tract level.  The map allows you to view the prevalence of a number of behaviors effecting health at neighborhood level, such as binge drinking, smoking, obesity and physical activity. You can also use the map to view the prevalence in neighborhoods of a number of different health issues and diseases.

Slavery and the Modern Jail Population


The United States likes locking people up. According to the Prison Policy Initiative's report States of Incarceration: The Global Context 2016 "every state (in the USA) is more likely to incarcerate its residents than almost every other nation on the planet".  The NAACP reports that 25% of the entire world's prison population is living in American jails. This propensity to lock up its citizens affects African Americans more than most other Americans. The NAACP says that "African Americans are incarcerated at nearly six times the rate of whites" in the USA.

There is also a geographical factor at play in the incarceration rates of the different states in the USA. The Prison Policy Initiative states that "the South has consistently had a higher rate of incarceration than the other regions of the United States". The Pudding decided to explore if there was any connection between the high rate of incarceration in Southern states and the legacy of slavery. By mapping 150 years of census and incarceration data they wanted to see if historic incarceration rates differ between the former slave states and the non-slave states of the North.

In the Shape of Slavery The Pudding examines the number of slaves in Southern states before the Civil War, the black population across the United States over time and the number of prisoners in each state over time. Using these different map views it is possible to compare the rate of incarceration between Southern and Northern states.

Saturday, March 04, 2017

Cartographic Connections


The Notre Dame School has produced a Story Map which examines the techniques that cartographers use to show connections between different locations on maps. Switched On or Switched Off explores how map makers use isochrones, proportional flow lines, isolines and other techniques to show connectivity.

Switched On or Switched Off not only provides explanations of the various ways that cartographers show connections but also includes a comprehensive number of examples of interactive and static maps to illustrate these connectivity techniques. As you progress through Switched On or Switched Off the example maps are embedded within the Story Map. Many of these maps are live which means that you can interact with them in the map panel.

Friday, March 03, 2017

How London Gets to Work


According to the Mayor of London's office the number of people cycling on London's roads has seen remarkable growth over the last few years. Last year the GLA's report into the impact of the Mayor's Vision for Cycling stated that during the morning rush hour "on some main roads, up to 70 per cent of vehicles are bicycles" and across the city "32 per cent of all vehicles on the roads are now bicycles".

You can see how cycling in London has increased drastically over the last 15 years on a new mapped visualization of cycling during the morning rush hour from Suprageography. Suprageography's London Traffic Counts Map visualizes the mode of transport used in the morning rush hour on London's roads over the last 16 years. The map uses Department of Transport traffic count data for the hour of 8am to 9am to show how people are commuting to work on London's roads.

The map shows how, particularly in central London, cycling has become one of the most popular methods of traveling to work for commuters on London's roads. Using the map you select up to three different modes of transport. Each mode of transport is shown as different colored circles, with the size of each circle proportional to the flow.

The map also allows you to allow you to visualize the change in the popularity of any of the modes of transport between any two years. In this visualization the green circles show an increase and the purple circles indicate decreases in the traffic counts for selected mode of transport.

Thursday, March 02, 2017

Animated Flow Mapping


The Canvas Flowmap Layer is a library for the ArcGIS JavaScript API which allows you to map objects flowing from one location to another.You can see the Canvas Flowmap Layer in action on this demo, which uses the library to add animated flow lines to a world map.

The library uses Bezier curves to visualize the movement of objects from one location to another. One purpose of using Bezier curves is that you can show the direction of flow by using either a convex or concave curve on your flow line. The direction of flow is also visualized by the library with animated dots which travel along the flow map lines in the direction of flow.

The library allows you to adjust the speed of the animated flow dots and provides options to use linear, ease-out or ease-in animations.

Wednesday, March 01, 2017

Make Your Very Own Toposcope


A toposcope is a marker that is placed on the top of a hill or other elevated position to show the direction and distance to notable locations which can be seen from that point. Toposcopes can usually be found at popular vantage points to help you spot nearby locations which can be observed from that position.

If your favorite hill or elevated position doesn't have its own toposcope then don't worry as you can now make your own with this new Toposcope Maker. The Toposcope Maker is a simple to use tool which helps you make your very own handy guide as to what can be seen from any location on Earth.

To create your own toposcope for an elevated position you first need to click on the provided map to show your central position. You can then add nearby points of interest to your toposcope by selecting the marker option from the map toolbox and clicking the POI's location on the map. A line will then be added to the map showing the direction and distance to your added point of interest. You can edit the text label on the line to add a label for your point of interest. You can then continue to add as many other points of interest to your topscope as you want.