Friday, September 21, 2018

Mapping Meteorite Strikes

Displayr have been busy mapping where meteorites fall. They have created a number of mapped visualizations of NASA's Meteorite Landings database. The database contains information on all known meteorite landings. The Displayer maps however only contain information on the 1,107 meteorites that were recorded as they fell.

In What Are Your Chances of Being Hit by a Meteorite Displayr unveils a number of reporting biases which make it difficult to determine where in the world you are most likely to be hit by a meteorite. Their interactive maps show that more meteorites are spotted in areas with a high population density. In other words the number of people in an area looking at the sky can effect how many meteorites are seen.

Displayr have also discovered a reporting bias in favor of larger meteorites. After mapping the size of meteorites Displayr discovered that larger meteorites are much more likely to be seen than smaller meteorites. And - if you are worried about being hit by a meteorite - you will be happy to learn that you have more chance of being killed by lightning or a tornado.

You can view a more dramatic mapped visualization of meteorite strikes on the Visualizing Meteorites across Spatial & Temporal Attributes interactive globe. This WebGL globe shows meteorite collisions with the Earth by decade.

You can select to view a decade using the timeline at the top of the page. The mass of each meteorite is represented by the size of the cylindrical projection and the color of the projection indicates the meteorite type.

The UK Isotim Travel Map

There are lots of interactive isochrone maps, which can show you how far you can travel within a set amount of time. But there aren't many interactive isotim maps, maps which show you how far you can travel for different amounts of money.

In the UK you can now use faremap to see how far you can travel on public transit for the change you currently have in your pocket. Enter a destination into faremap and it colours the whole of the UK based on the cost of train travel to the destination from your current location. Just as an isochrone map shows lines of equal time this isotim map shows lines of equal transport cost. Each color on the map shows an area of equal travel cost.

As well as showing you how far you can travel for different amounts of money faremap is also a really useful split fare map. One of the many crazy and ridiculous barriers to train travel in the UK is that for many train journeys it costs more to buy one ticket to your destination rather than buying multiple tickets for different stages of the journey.

If you enter a starting station and a destination station into faremap it will show you the cheapest split fare tickets, tell you what stations you must travel through and the cost of each ticket that you need to buy.

Twenty Years of India Lights

From 1993 to 2013 the Defense Meteorological Satellite Program (DMSP) took nightly pictures of India from space. The University of Michigan, in collaboration with the World Bank, has examined all 20 years of these satellite images to analyze how light output has changed across India during this time.

India Night Lights is a project from the University of Michigan and the World Bank to visualize and provide access to this night lights data. The India Night Lights project includes an interactive map which allows you to compare a night light view of India for any two different dates. This allows users to make a direct comparison of the amount of light measured in 600,000 different villages across the country for any two different dates during the twenty years of available data.

As well as the interactive map India Night Lights includes a number of visualizations of different 'Stories' which emerge from the data. At the moment these stories include a data visualization of how Diwali lights up India every year, the impact of electricity development projects in India and how electricity is administered in Uttar Pradesh.

The India Night Lights Project also includes an API which provides free access to India's night light data. This allows developers to access the light output at night of 600,000 villages across India for the twenty years from 1993 to 2013.

Thursday, September 20, 2018

What Causes California Wildfires?

What do you get if you combine huge forests, global warming and lots of people? The answer is devastating wildfires. At least that appears to be what is happening in California.

According to The Guardian the extensive California forests are full of dead trees, nearly 129 million of them. Because of global warming the past five years have been the hottest recorded in California and the state has only just emerged from a six year drought. The result of this extended hot dry weather and 129 million dead trees is you have almost the perfect conditions for wildfire. All you need now is human beings.

Humans are responsible for 84% of wildfires and California has a lot of them. These people are also increasingly living in the state's high-risk fire corridors. The result is a highly combustible situation. Of course when those inevitable wildfires do occur the drought conditions mean that there is little rain and groundwater around to help put out those fires. You can learn more about Why California's Wildfires are So Bad on this Guardian story map.

The Football Fans Optimal Road Trip

Randy Olson has worked out the optimal road trip for football fans. If you undertake his optimal football fan road trip you can visit 48 different stadiums, watch 90 different teams, and witness 6 of the biggest rivalries in college football. All within this year's 51-day season schedule.

To create the Optimal Football Fan Road Trip Randy set himself a number of rules. The trip only includes Division I FBS teams, there is a maximum of one game every day, and you are allowed to fly between different locations. The use of flights means that this is more of a tour of the different stadiums rather than a strict road trip.

Here is where you can view the map of the Optimal Football Road Trip for the 2018 Season. However you will also need to refer to the trip itinerary which tells you which stadium you need to visit and on which date / game you need to be there. You can view this itinerary on How many college football teams can you watch in-person in one football season?

If you aren't a football fan then you might be more interested in Randy Olson's other optimal road trips:

The Optimal Road Trip Across the U.S.
The Optimal Road Trip Across Europe.
The Optimal Road Trip of U.S. National Parks

Wednesday, September 19, 2018

School Road Safety

Zendrive has released an interactive map which allows you to check how safe the roads are around your local schools. Zendrive's School Safety Snapshot provides a safety rating for all schools in the USA based on driver behavior around each school.

To grade each score Zendrive measured the number and type of unsafe driving events, as detected by the Zendrive platform, around the school. The grades are based on a snapshot of driver behavior around the school in April 2018. You can compare each school's safety rating for 2018 to the rating given to the school in 2017.

The School Safety Snapshot interactive map works at different zoom levels. When zoomed out the map provides a choropleth view showing the overall school safety record in each state. If you select a state on the map you can then view the school safety ratings for each county. If you select a county on the map you can view the individual ratings for all the schools in the county.

Getting to Know Basle

Most Americans in Basle live in Altstadt Grossbasel. Germans living in Basle prefer the neighborhoods of Riehen and Bettingen, which are right next to the German border. The Riehen and Bettingen neighborhoods are also popular with old people. Most young adults (20–39) live in Rosental, Gundeldingen, Matth√§us and Altstadt Kleinbasel. These are also some of the least popular neighborhoods for people over 50.

I discovered these interesting facts about Basle on Getting to Know Basle Districts. This data visualization tool maps out all kinds of demographic, economic and census data about each of the Swiss city's 21 different districts.

Getting to Know Basle starts with an interactive map which allows you to select any of the city's neighborhoods to view a breakdown of the district's population, including the number of residents born overseas, the average net income and the district's income & wealth inequality. As you progress through the data visualization Getting to Know Basle Districts maps out lots of different economic and demographic variables using official data from the city's Statistics Department.

Mapping Migration Flow

Migration in Latvia is a wonderfully designed interactive map which visualizes the country's internal migration flow. The map was developed by Latvia's Central Statistics Bureau.

The overall choropleth view of Latvia visualizes the number of people who have left each town and region in Latvia since the year 2000. You can also toggle this choropleth view to show the number of people who have moved into each town and region since the turn of the century.

Select a town or region on the map and flow lines are added to the map showing where people from that area moved to between 2000-2018. You can also switch this to view instead the inward migration flow of people into the selected town or region. You can also switch to view the migration flow between three different periods of time; during the last 18 years, the last 7 years or just the migration flow in the last year.

The map sidebar also breaks down some of the migration flow data for the selected town or region. This analysis includes a list of the top 30 locations where people moved to or from. It also includes a breakdown of the number of people who moved into the area during the selected time period and the number of residents who moved out of the area.

Also See

American Migration - visualizing migration flow to and from American cities
US Migration Flow Map - a map showing migration flow between US states
Population Explorer - visualizing the migration flow of towns & regions in New South Wales, Australia

Tuesday, September 18, 2018

Hurricane Florence Aerial Imagery

NOAA’s Remote Sensing Division has been flying its airplanes along the North and South Carolina coast since Saturday. The planes have been collecting damage assessment imagery in order to help and support emergency response after Hurricane Florence.

The Hurricane Florence Imagery interactive map allows you to view the latest imagery on top of a map and pre-Florence aerial imagery. The map includes three layers of aerial imagery, captured on Saturday, Sunday and Monday. The imagery captured on the 15th covers the coast from Cape Henry, Virginia to Oregon Inlet, North Carolina. The imagery from the 16th is from Charleston, South Carolina to Ocean Isle Beach, North Carolina. The imagery captured yesterday is from Myrtle Beach, South Carolina and from Oak Island to Oregon Inlet in North Carolina.

As well as aiding emergency response to the storm NOAA's aerial imagery will be used to assess the damage caused by the storm and flooding. Aerial imagery provides one of the most cost-effective ways to analyse storm damage to both property and the environment.

Mapping Gentrification in Austin

The University of Texas was commissioned by the Austin City Council to research and map neighborhoods in the city where residents are being displaced by development and the rising cost of property. You can view the results of this research on the Austin Gentrification and Displacement Indicators interactive map.

The map allows you to see which Austin neighborhoods are most vulnerable to displacement, which are becoming more vulnerable, which neighborhoods have experienced the biggest changes in property values and which ones have experienced the most gentrification. The different gentrification and displacement indicators can be selected and viewed by selecting them from the menu above the map.

Also See

Turning the Corner - mapping gentrification in Detroit
Urban Displacement - mapping gentrification and displacement in Los Angeles
Displacement Project Alert Map - mapping displacement pressures in New York City
The UCB Urban Displacement Project Map - mapping gentrification & displacement in the San Francisco Bay Area
Ungentry - mapping demographic change and gentrification in Boston