Each week, Spatial Source finds the best that the internet has to offer.

For decades NASA has used computer models to simulate the flow of air around test aircraft. Recently, they applied the same technique to explore the aerodynamics of the popular DJI Phantom 3 quadcopter drone, and the results are stunning. [NASA]

Trees do amazing things for a city. They help mitigate extreme temperatures, provide a natural respite from traffic, noise, and congestion, and improve the quality of life for those living in urban environments. But how do you know if your city is green enough? MIT and the World Economic Forum sought to answer that question by creating Treepedia, a website of interactive maps that catalogues and compares the density of green areas in 13 major cities around the world. [Geoawesomeness]

A new atlas of Switzerland conquers the challenges of making maps for the blind. Designed to be read with the fingertips, the new atlas is printed with special ink that expands when heated to create tiny bumps and ridges on the page. [National Geographic]

The Kirin Brewery company in Japan has created a fun interactive map which consists entirely of user submitted emojis. The map allows users to show how they feel about any location in Japan by leaving their own emoji at the location on the map, bringing a new sense of emotion to geography. [Maps Mania]

Have you ever wondered how Google Maps knows the traffic in your city and directs you on the fastest route? The answer might freak you out. Watch this video and discover… [Business Insider]