If you’ve always wondered how this whole blockchain thing works, but didn’t dare to ask: Here’s an excellent high-level introduction that explains the basic principles.
I knew that Uber drivers do not make a terrible lot of money, but this breakdown shows how bad the situation really is for them. If you factor in all costs, drivers are getting ripped off to the point where they are actually losing money when they drive for Uber. So much for the ethics of the self-proclaimed sharing economy.
I just hope the old school taxi cab companies will eventually get their act together and make it as easy to order a cab as Uber does.
Very cool idea with an impressive visual result:
This film was made mining the Thomas Jefferson’s Grid in Google Earth. By superimposing a rectangular grid on the earth surface, a grid built from exact square miles, the spherical deviations have to be fixed. After all, the grid has only two dimensions. The north-south boundaries in the grid are on the lines of longitude, which converge to the north. The roads that follow these boundaries must dogleg every twenty-four miles to counter the diminishing distances: Grid Corrections
Very cool project:
For any city, thousands of geotagged photos are available online. The project maps these photos in the places where they were taken.
A custom-built camera flash + smartphone setup queries the Flickr and Panoramio APIs for photos taken at the current geographical position. Whenever there’s a photo available, a flash is triggered.
Long-exposure photography captures multiple flash lights — each representing one geotagged photo — and situates them in the place of their origin.
Head over to the project page for more photos, process as well as technical details: philippschmitt.com/projects/lightpainting
Dear Internet: A birthday message from your dad.
I think it is time that GIScience research looks deeper into privacy issues. Many of the things we develop actually enable invasion of privacy, even if we different purposes in mind.
[via John Goodwin’s Tumblr]
Awesome visualizations of Foursquare check-ins in mayor cities aroud the world.