Category Archives: Uncategorized

Qgis

Qgis (previously called Quantum Gis) is a program which is used to make maps. Much data of scientific institutes is freely available on the internet. By combining these (graphic) data and adding one’s own images, legenda en symbols, one can … Continue reading

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LaTeX

LaTeX, which is pronounced «Lah-tech» or «Lay-tech» (to rhyme with «blech» or «Bertolt Brecht»), is a document preparation system for high-quality typesetting. This is the English definition of the tool with which you can create PDF files of high quality. … Continue reading

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Meetthegimp.org!

The site Meetthegimp.org! offers instruction videos for the program Gimp. The videos are made by and the website is managed by the German Rolf Steinort. For the beginner but also for the more experienced an ideal site if you want to … Continue reading

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Multipart-upload to AWS

In the last post I talked about uploading big files to Amazon Glacier. This is because I want to upload a big file to Amazon Glacier. The backup of my site is 1,8 Gigabytes. That means that uploading to the … Continue reading

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Amazon Command Line Interface (CLI)

To make a backup of this site, I have decided to make use of AWS Glacier. But it is not that easy to use AWS (Amazon Web Services) if you have Linux installed on your desktop. While there are plenty … Continue reading

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Again Hue/Saturation/Lightness

I won’t often place Youtube videos on my blog but this video explains so well what Hue/Saturation/Lightness is, that it deserves a place on my blog. Click on the link underneath. In this video the word lightness is called luminosity. … Continue reading

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New color tool of Wikimedia Commons.

You need at least 4 colors to make a map where the boundaries of the areas don’t have matching colors. But you can’t pick any 4 colors. If you do, the result can be very disappointing. Someone has posted a … Continue reading

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Code in SVG-files

To see whether or not there are errors in a certain SVG file, you can make use of a validator of W3C. There are several steps required in order to make the SVG file “valid”. If necessary one could always … Continue reading

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Bought a new book: Islamic design

In search of a book that would tell me more about Islamic art I stumbled upon the book “Islamic design”, written by Eric Broug. It is a masterpiece. There are very beautiful pictures in it. Also extensive descriptions. But it … Continue reading

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Islamic geometry

> The illustration on the screen is used to screen off the activities taking place at Metrostation Blaak. Clearly one can see the mathematical illustrations. This inspired me. I wondered how I could make them myself one day. After searching … Continue reading

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