Fri Jan 10, 2020 12 Projections for 2020 (Intro)
I’m a map projection nerd and people I know have to suffer from it.
It’s not only that I start babbling about the pros and cons of various map projections whenever I get the chance, but each Christmas, a few of them get a map projection calendar thrown into their face.
Five years ago, I thought it’d be nice to hang up a monthly calendar with 12 (or 13, counting the frontispiece) map projection images. And since I’m practical and lazy on top of it, I ordered the calendar I built several times and at Christmas I gave it to the baffled friends/family/work colleagues. And then I made a tradition out of it and now the poor people have to endure a calendar like this every year.
You could think that I’ve already bored enough people… but now I’ll start on you! And since I can’t hand out a calendar to each of you, I’ll just talk about it.
So this year I will write about a projection once a month – the one that the calendar shows in the respective month. I’ll try to keep it short and simple but I don’t promise anything. 😉
Today, I’d like to show the title image (see above) and I’d like to mention
briefly how I select the 12 projections: Well, I just try to put together an
interesting mix of different projections. Different in their appearance, but
also from different
groups and having different properties.
I try not to repeat myself, so I don’t select projections that have been in
one of the previous calendars – except I show a different aspect or different configuration.
Of course, by this time it’s getting hard to find another 12. Yes, there are hundreds of projections but for example I really don’t have to show each and every pseudocylindrical. So the 2020 calendar may even be the last one – but I already thought that last year…
For the frontispiece I chose the unprojected earth…
Well, no. Since it’s hard to put a sphere with a diameter of 12,742 km on a 20 × 20 cm calendar, I chose the next best thing: The Orthographic Projection, centered to 31°N/10°E so I can see my home. To make it look like the Earth, viewed from space, I projected a clouded Earth image and a starfield taken from the Natural Earth III image set.
And yes, I wanted to take 30°N. I like round numbers. Must have been a typo when I entered the coordinates. 😳
Soon, you’ll see the January page of the calendar, after that the series will continue monthly.
My 2020 Map Projection Calendar
To read another part of my 2020 map projection calendar series, select the desired month.