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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 process of re-projection, so I rather boldly asserted that you don’t need to re-project your DEMs before making shaded … Continue reading Making shaded relief directly from DEMs projected in degrees? →
over a year ago

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More from The Wandering Cartographer

Constructing the Pattern on the Sala de la Barca Ceiling

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 →

a year ago 113 votes
The Mathematics of the Pattern on the Sala de la Barca Ceiling

(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 →

a year ago 116 votes
Transforming French WW1 Lambert Coordinates to WGS84

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 →

a year ago 105 votes
Cartographic palettes and colour harmonies

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 →

over a year ago 119 votes
Constructing Bourgoin’s Figure 171 – Part 2

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 →

over a year ago 60 votes

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Ford and the Birth of the Model T

Ford’s status as a large-volume car producer began with the predecessor to the Model T: the Model N, a four-cylinder, two-seater car initially priced at $500. At the time, the average car in the US cost more than $2,000, and it seemed nearly unimaginable that a car with the capabilities of the Model N could cost so littl

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The Other Stations (226 Garages and Service Stations, by Philip Butler)

Railway stations, bus stations and… filling stations? The first two have made frequent appearances on the pages of this website, the third far less often. Filling stations, and their close cousins garages and car showrooms, only occasionally attract significant architectural attention. Although it can happen from time to time (there’s a list of filling stations […]

3 days ago 10 votes
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Thermal energy storage, an adjustable allen wrench, the new race to the moon, the former world’s largest indoor water park, and more.

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