A shoutout to Keir Clarke at Maps Mania, whose coverage of election maps is such that whenever I think, “hey, that country just had an election, I ought to write a post collecting some maps of the results,” I usually find that Keir has already beaten me to the punch.
Month: November 2022
ESA Considering Low-Orbit Satellites to Improve Galileo System
The idea of using low-earth-orbit satellites to provide greater GPS/GNSS accuracy isn’t limited to commandeering the Starlink constellation. The European Space Agency is exploring the idea of using low-flying satellites to increase Galileo’s accuracy and robustness: make it possible to use indoors, make it more resistant to jamming and interference, and enable positioning at the centimetre level. They’re planning an in-orbit demonstration of around six satellites to test the proposition. The satellites would supplement the existing Galileo constellation rather than replace it: for one thing, they would rely on the Galileo satellites’ atomic clocks, which would allow the low-flying satellites to be an order of magnitude smaller in size. [Universe Today]
Chronotrains 1911
Benjamin Tran Dinh’s interactive isochrone map of Europe showing how far you can go by train in five hours (previously) has a new variant that does the same thing for 1911 France. Getting closer in time and place to those original isochrone maps. [Maps Mania]
What Do You Mean, Three Norths?
The Ordnance Survey is making a small deal over a so-called “triple alignment” of true north, magnetic north and grid north early this month: “the historic triple alignment will make landfall at the little village of Langton Matravers just west of Swanage in early November and will stay converged on Great Britain for three and a half years as it slowly travels up the country.”
Now, grid north is an artifact of a map projection’s grid lines. On a map grid there’s always some difference between true north and grid north except along the central meridian, which in Ordnance Survey maps is two degrees west of Greenwich. The further away from that central meridian, the greater the difference.
What the Ordnance Survey is hyping is that magnetic north, which is constantly shifting, has moved to a point where magnetic declination (the difference between true north and magnetic north) is zero along that central meridian. Kind of neat—if you’re using an Ordnance Survey map. Because this particular triple alignment only exists for Ordnance Survey maps. It’s all a bit anglocentric, really (especially the bit in the video that describes true north as “the line which runs through Britain to the North Pole”).
Report: Google to Shut Down Standalone Street View App
According to 9to5Google, Google looks like it’s getting ready to shut down its standalone Street View app (previously). “This standalone app served two distinct groups of people—those who wanted to deeply browse Street View and those who wanted to contribute their own 360° imagery. Considering the more popular Google Maps app has Street View support and Google offers a ‘Street View Studio’ web app for contributors, it should be no surprise to learn that the company is now preparing to shut down the Street View app.” If their report is correct, the shutdown would take place next March. [The Verge]