Hexagons, quasi-maps and cartograms

Some months ago I mapped Switzerland’s administrative regions using a hexagonal cartogram. That idea was inspired by pioneering work of the Leicestershire County Council. After consulting with experts in the field – Leicestershire’s Alex Lea, Danny Dorling of Worldmapper (currently at the University of Oxford) and Adrian Herzog of MAPresso fame –  I came up with my own workflow for the creation of such a cartogram, documented here and here. (Though beware: Mike Bostock liked the results but found it relatively laborious when he made one).

Ever since I published that cartogram, I have the feeling to see hexagonal maps everywhere. Most recently, my friends and colleagues at Oxford Internet Institute, Stefano de Sabbata and Mark Graham, have published the following cartogram along with their now famous map “Ages of Internet Empires”:

Internet Empires by OII
Internet Empires by OII

Another nice example, though not a cartogram, is this visualization of New York transit times (let’s not talk of the rainbow colour scale for a moment): Continue reading “Hexagons, quasi-maps and cartograms”

Projection from WGS1984 to Swiss national grid (CH1903 LV03)

In my last project I used (standalone) Python for geoprocessing. Since ArcGIS or something like that was not there to help with projecting geodata from one coordinate system to another, I wrote a function which converts well-known WGS1984 to Swiss national grid coordinates (Swissgrid, CH1903 LV03). Swisstopo has the formulas of an approximate transformation and also funtions in C#, Javascript … Continue reading Projection from WGS1984 to Swiss national grid (CH1903 LV03)

Py all means

Over on his blog, Bill Dollins muses about the range and ubiquity of the Python language in the geospatial realm. It’s true – if you work with ESRI products on a daily basis (like I do) you almost can’t get away without using Python one way or the other, be it for scripting some workflow, … Continue reading Py all means

Gefährdung der Bevölkerung der Schweiz durch Kernkraftwerke: Eine Analyse

(Deutsch weiter unten) Things have been a bit silent around here for the last days. That’s because I have been busy with a private project of mine: doing a spatial analysis of the exposure of the Swiss population to the dangers of nuclear power plants and writing a report about it. The processing was done … Continue reading Gefährdung der Bevölkerung der Schweiz durch Kernkraftwerke: Eine Analyse