Sunday, March 01, 2015

Mapping India's Water Supply & Demand

It is predicted that India will only be able to meet 50% of its water demand by 2030. A new map, from the World Business Council for Sustainable Development and other organizations, has been released to help water users in India respond to these challenges by measuring and mapping water risks in the country.

The India Water Tool uses 14 datasets and risk indicators to map India's water supply and water-related risks. The map provides an overview of annual rainfall across India and an insight into groundwater levels and surface water quality. The map also allows you to view projected water demand for 2025.

Saturday, February 28, 2015

Berlin in Incredible 3d

Wirtschaftsatlas Berlin is a map of Berlin which includes a pretty amazing isometric view of the city with fully textured 3d building models. The map also includes a more traditional OpenStreetMap 2d map view and Google Maps Street View.

To create the 3d map around 500,000 Berlin buildings were photographed from the air and their roofs were measured by Lidar. From this data photo-realistic 3d models of the buildings were created for the map.

Mapping Wheelchair Accessibility is a French Google Map of wheelchair accessible venues. The site provides an easily searchable map of categorized accessible venues, including restaurants, hotels, museums etc.

You can filter the results shown on the map by category. When you select a venue's marker on the map you can click through to view all the venue's accessibility information and other disability/accessibility facilities provided by the venue.

The map results automatically update as you pan and zoom the map. The map also support browser navigation, so you can use your browser's back button to return to previous searches and map interactions. is provided as open data. Not only is the map free to use but the venue accessibility data can be used in your own applications.

Wheelmap is another interactive map dedicated to showing the locations of wheelchair-accessible public venues. Wheelmap uses three colors of markers to indicate the accessibility of venues, a green marker means the venue is accessible, orange means it is partially accessible and red means that the venue is not accessible to wheelchair users.

Wheelmap is a crowd-sourced project which means that anybody can add information to the map. Logged in users can also upload photos of venues listed on the map and add comments about the wheelchair accessibility of the venue.

Friday, February 27, 2015

The White and Gold Dress Map

Alan McConchie needs your help. He created this blue dress, white dress map and there seems to be some controversy over what color it is.

Is this map white and gold, or blue and black? Me and my friends can’t agree and we are freaking the fuck out.

It seems to be freaking a few other people out as well. The BBC created this video of Twitter activity on Trendsmap showing how #theDress has spread around the world.

Disclaimer: This trending topic may not be entirely concerned with the color of this map.

The Tokyo Metro in 3d

Metrogram3d is a hypnotizing WebGL powered 3d visualization of Tokyo's metro trains. Using data from the Tokyo metro timetable the map simulates the movement of the trains throughout the city.

Unfortunately this 3d visualization doesn't include the names of the stations, so it is doesn't really work as a map. This isn't helped by the fact that the map also doesn't seem to give you any control and appears to follow it's own tour of the metro network. As the tour plays out however it does indicate the metro line in view in the bottom left-hand corner.

If you want a more traditional interactive map view of Tokyo's transit system then have a look at Tetsudo Now. Tetsudo Now is a real-time Google Map of the Japanese public transit network. The map simulates the current locations of buses and trains in Japan's largest towns and cities.

The position of the vehicles on the map are animated based on the transit timetables. Users can select which city's transit map they wish to view from a drop-down menu. They can also select the time of day they wish to see simulated on the map from another drop-down menu.

Visualizing Ten Years of OpenStreetMap

Mapbox has released an animated map visualizing the growth of OpenStreetMap data over the ten years since the project started. Ten Years of OpenStreetMap shows how OpenStreetMap has grown in ten years from a map of a few London streets to one of the most detailed maps of the world.

The animated map reveals how OpenStreetMap has particularly developed in the last 5 years from largely a map of the United States and Europe into a truly global map.

Martin Raifer's OpenStreetMap Node Density also provides a general overview of OpenStreetMap's global coverage. Each pixel on the map shows the number of nodes at that location. Martin Raifer's map shows OpenStreetMap node density as of June 2014.

Of course OpenStreetMap is an ongoing project to map the world. The world is always changing and OpenStreetMap needs to reflect those changes. Therefore dedicated volunteers around the world are always working to improve the map.

OSMlab's Show Me The Way provides a real-time view of OpenStreetMap's contributors in action. Using satellite imagery from Bing Maps 'Show Me The Way' provides a captivating visualization of the ever improving OpenStreetMap project.

Thursday, February 26, 2015

Animated Heat Maps of Weather Data

A few weeks ago CartoDB released CartoDB Heat Maps. This new heat maps option in CartoDB leverages the power of the Torque library, which allows developers to efficiently render and publish very large datasets to the client.

CartoDB Heat Maps can also be used with Torque to create animated heat maps. Where this could be particular useful is in visualizing weather data and patterns. For example, check-out this map of historical Hurricane and Tropical Cyclone Track Density. The map animates the track density of hurricanes and tropical cyclones from 2000-2013, using data from the National Climatic Data Center - NOAA.

Not to be outdone Mapbox has been playing with the latest update of Turf.js to create animated heat maps of historical U.S. hail data. Turf now includes powerful new functions to aggregate dense point data into grids and heat maps. Mapbox has created a demonstration of this new heat map ability in a blog post, Animated Heatmaps and Grids with Turf.

The map not only shows an animated heat map of historical hail data but also allows you to view the data as animated hexbins, triangles, squares and points. The map also includes the option to view the animated data in three different speeds.

US River Mapping

Hydro Hierarchy is a map of the largest rivers in the United States and their monthly river flows. Select a river segment on the map and you can view a chart of its 2014 monthly river flow.

The horizontal red line on the bar chart represents the ten year mean monthly flow, which means you can compare each month's river flow to its yearly average. The 2014 drought means that on most river segments most months will be below the ten year average.

The radial chart to the left of the map is a hierarchical representation of the stream network. If you mouse over to the center of the chart you can view river terminations at the ocean or international borders.

Hydro Hierarchy only visualizes rivers and streams with a Strahler stream order classification of four or greater. Andrew Hill has created a map of all United States rivers in which the rivers are colored by the direction of flow. The U.S. Rivers Colored by the Direction they Flow map shows the colored river locations on a black background to create a visually striking map of the United States.

The map uses data from Nelson Minar's Vector River Map, which in turn uses river flow data from NHDPlus. Andrew has also used the same river data to create another beautiful map. Rivers with Rainfall. This map shows U.S. rivers and rainfall in the last hour. The rain data comes from a National Weather Service data feed.

You can read more about the Hydro Hierarchy map on the Esri Blog and download the source code on the Esri website.

Wednesday, February 25, 2015

The New York Time Machine

Every time I make a good map I soon find out that someone has done it better. Recently I've spent a lot of time creating vintage map browsers with the Leaflet mapping library. I used the New York Public Library's map collection to put together a map of New York Vintage Maps. I then used the amazing David Rumsey Map Collection to create a map of San Francisco Vintage Maps.

Well it turns out that Vestiges of New York has created a better collection of New York vintage maps, using vintage maps from both the NYPL and the David Rumsey collection of historical maps. Their NYC Time Machine is very similar to my map, except it has far more vintage maps of New York maps for you to browse through.

The NYC Time Machine includes 27 vintage maps of New York, ranging in date from 1660 to 1924. The map includes a neat option to quickly switch between your chosen vintage map and a modern map, allowing you to compare the vintage map to the modern streets of New York.

Mapping African Democracy

President Teodoro Obiang Nguema Mbasogo of Equatorial Guinea and President Jose Eduardo dos Santos of Angola have both been leaders of their respective countries for 35 years. According to the Economist neither country qualifies as a full democracy. There are 27 countries in Africa ruled by an authoritarian regime or a nominal democracy. The Economist claims that Mauritius is the only African country to qualify as a full democracy.

In a series of interactive maps The Guardian has mapped various indicators of democracy and government in Africa. Using data from the Economist Intelligence Unit Democracy Index 2014, the CIA Factbook, the World Intellectual Property Organisation and Intellectual Ideal the newspaper has mapped out the presidential term limits, voter turnouts and the longest serving leaders in African countries.

Power in Africa: Democracy Mapped uses CartoDB to present a series of interactive maps showing the state of democracy, the number of registered voters and the number of voters in African countries. It also includes maps of presidential terms limits and the lengths served by Africa's current leaders.