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 […]

RStudio – one big step towards user-friendliness of R

R is the greatest open source statiscal programming package around. It is all a mapper need to pretreat data. Yet it suffers from interfaces that are either uggly, tedious to set up, clumsy to use or all of these. After years of glaring at the Windows interface of R, I’ve finally sutmbled upon a nice […]

Change the language to English/US on all slides and boxes in PowerPoint 2007 to 2016

Changing the language of a whole presentation in MS PowerPoint can be tedious. Especially when you translate your slides. You easily end up with a mix of languages on a number of slides. You notice, then, that it is not possible to select the main one: the language button (on the bottom bar) is simply […]

Augmented Reality and the Places of Dreams

Behind the illusion In Herzog’s Fitzcarraldo, Klaus Kinski with his eyes buried deep into another world stands on the shore of a river and says: Everyday life is only an illusion behind which lies the reality of dreams This is what the Jivaro Indians reportedly believe. But what Kinski’s character sees is his boat climbing […]

ScapeToad – Anamorphosis or Metamorphosis of the Base Map ?

Most 2D-maps are used to represent topographic metrics: distances and areas measured on the map (multiplied by the map scale) give traveling distances and land surfaces. In some cases, this information is irrelevant or even misleading [see an example]. As a cartographer, you may wish to use map metrics to represent other data, such as […]

TinEye – Find an Image With an Image

The TinEye search engine allows you to find images on the web based on an image-file URL.You can also upload the image to search for. Basically, the serch engine finds copies of your image scattered around the web. The algorithm has an excellent tolerance for resolutions and color variations. Here an example with one of […]

Design you color scheme

Searching for an harmonious color scheme starting with a givent color? I recomend Petr Stanícek’s “Color scheme designer“. Using a simple yet powerfull graphical interface, you can find complementary, triadic analogic and many other methods to any web color. Colors can be directly copied to your CSS. I recommend combined use with ColorZilla Firefox plugin.