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JAN 16TH, 2012
Shaded relief maps with QGIS

Creating a shaded relief map from digital elevation data is a nice way to create a backround map for web mapping or other GIS work. Thanks to the know-how and the funding from the Swiss Humanitarian Aid Unit, QGIS now has a sophisticated function for relief map generation. The method is described in detail in an paper by Marc-André Bünzli. An important part of the method is the choice of the elevation colors. Read on


DEC 30TH, 2011
Raster resampling in QGIS

QGIS already offers a lot of possibilities to visualize raster data (contrast enhancement, color map, handling of transparent pixels, …) Last year, Radim Blazek refactored the raster provider interface and added on-the-fly reprojection support for rasters to QGIS. Very cool! One of the few things currently missing in QGIS raster layer is the possibility to have other resampling types than nearest neighbour. The problem is that rasters appear pixelated when zooming further than the source raster resolution. Read on


NOV 8TH, 2011
SMTP death penalty for Ebuyer.com

For an unknown reason Ebuyer.com was spamming me for years and wouldn’t take me out of their spam distributor. So now they’re blacklisted on the SMTP level. No more spam to any of us or any of our customers/domains. mail:~# cat /etc/exim4/local_sender_blacklist *@*ebuyer.com Bye bye Ebuyer spam Read on


SEP 19TH, 2011
per user X11 options

One would expect that considered the complexity of gdm there would be a way to have per user X11 options. So no, there isn’t one. At least not after the great rewrite after V2.22. However good old Unix paradigms can help us (this is all under Debian, other Unices will allow a similar trick): $ vim /usr/local/bin/X Add something similar like this: #!/bin/sh # # start X with different options depending on user # check if the parent gdm process that started us contains # " Read on


AUG 22ND, 2011
Celebrating 20 years of Linux!

Read on
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