Restore “New > Text file” in Windows’ contextual menu

If you’ve changed your standard .tex file editor to Notepad2 or Notepad++, chances are that the contextual menu entry “Create New > Document file” has disappeared. To restore it, just save the following code as a .reg file and run it (thanks to Archos alias Limneos for posting the code on a SevenForums): Windows Registry […]

Colored proportional circles in ArcMap

Bivariate thematic mapping with ArcMap? Yes you can! Of course, you could also do it in D3.js (including a nice self-generated legend), or with much less effort in Quantum GIS (post in French). Whatever method you choose, colored proportional circles cannot be drawn directly on polygons, but you can draw them on points. Thus, all […]

A mobility network

Methods and tools After a day and a half of work and fine-tuning, here we go: the commuting network of all individuals either residing, working or studying in the canton Valais. I’ve used R, with the RStudio GUI, and the igraph library for R. My staring point was the mobility matrix between all communes, including […]

Crop an image in Adobe Illustrator CS3 or later

When you export maps from ESRI ArcMap to Adobe Illustrator, the raster background is by default exported as a series of associated bitmap strips, with superposed vector polygons.Here an example: In this – as in many other situations – you might need to crop the image to a specific area. Say the following rectangle: To […]

Fifty years of orbital tourism

Today, the United States are celebrating the 50th anniversary of John Glenn’s orbital flight: three tours of the globe in less than five hours. To mark the occasion, Craig Russell of Space Operations Inc., would have liked to see the mission replayed, but relying on private means only, this time. We get his point, because […]

Foucault’s left-overs and the urban heterostasis

Michel Foucault, in his 1984 essay Des espaces autres (Other Spaces), coins the term “hétérotopie”. He uses it to designate places evolving on the margin of what we could today call the territory of production. Foucault’s heterotopoi are cemeteries, brothels, prisons, boats, psychiatric hospitals… places inhabited by those who’ve either been excluded from society, or […]

Mars as a social question

“Allopatric speciation” occurs when a biological species divides in two distinct populations, due either to the emergence of a natural boundary (river, mountain) or to migration in opposite directions. Over hundreds of generations, the genotypes of both populations evolve on their own until, finally, they become two separate species. For some species of fruit-flies, this […]