I was flipping through Owen Jones’s Grammar of Ornament a couple months ago, and my eye was caught by this handsome pattern I had not noticed before. This is Jones’s Plate XLII, in the chapter on designs from the Alhambra in Granada, Spain. He calls it, “Part of the ceiling of the Portico of the … Continue reading Constructing the Pattern on the Sala de la Barca Ceiling→| The Wandering Cartographer
(This is the math geek part about the Sala de la Barca ceiling. For instructions on constructing the pattern with compass and straightedge, go over to Part 1.) In the process of figuring out how to draw this pattern, I ran into a lot of questions, and had to do more than a little math … Continue reading The Mathematics of the Pattern on the Sala de la Barca Ceiling→| The Wandering Cartographer
Nord de Guerre Here’s a survey plat made in 1919 by a US Army unit in France. In the aftermath of WW1, teams of American military surveyors produced these as they went around France mapping the grave sites of fallen soldiers. On this plat we can see a number of bearings and distances from the … Continue reading Transforming French WW1 Lambert Coordinates to WGS84→| The Wandering Cartographer
This story begins one day when I was assembling a map of the city of Edmonton, Alberta from OpenStreetMap data. It was going to be a big map, a 42″ (106 cm) wide poster for a wall. The data was good, but the standard OSM colours were not. They would work fine for a street … Continue reading Cartographic palettes and colour harmonies→| The Wandering Cartographer
Now that we know our way around the pattern (go back to Part 1), it should be fairly straightforward to construct with a compass and straightedge. But be aware: any pattern that requires you to construct a pentagon is an advanced challenge. They are trickier to make than squares or hexagons. Here’s what we want … Continue reading Constructing Bourgoin’s Figure 171 – Part 2→| The Wandering Cartographer
Just veering off into geometry here…. In November I was watching Eric Broug, an Islamic geometric design guru, give a talk online at an Islamic art conference, and I noticed that behind him they were projecting an interesting pattern on the scrim. I froze the video and grabbed a screenshot… What the heck is this? … Continue reading Constructing Bourgoin’s Figure 171 – Part 1→| The Wandering Cartographer
So, there I am, driving along in Edmonton, Alberta. I come to a stop light on Fort Road, look to my right and I see this: Is that a building with longitudes written on the roof?!?! And what are these longitudes? 9° 49’ W—that’s nowhere near Edmonton! Nor is 123°30’ E. What’s … going on … Continue reading 53° 30′ N→| The Wandering Cartographer
The Maps for Books collection has a new page: Peter Erasmus’s Buffalo Days and Nights. In 1920, Henry Thompson, an Alberta newspaperman, began interviewing 87-year-old Peter Erasmus, who lived near him in the area of Whitefish Lake, Alberta. Erasmus, who had been born in 1833 in the Red River settlement of what is now Manitoba, … Continue reading Mapping “Buffalo Days and Nights” by Peter Erasmus→| The Wandering Cartographer
I’m wrapping up my work on Gottfried Merzbacher—a sort of back-burner project that’s been active and then dormant, on and off, for about seven years. It’s been a pleasure to learn…| The Wandering Cartographer
In a presentation I gave at GeoIgnite 2021, I was explaining the process of using QGIS to make shaded relief from DEMs, more or less as detailed in this post. There wasn’t time to explain the…| The Wandering Cartographer
Updated, April, 2021 Tom Patterson, creator of the fabulous shadedrelief.com website, once said, “There is no more important component of a map than the shaded relief.” Who would not ag…| The Wandering Cartographer