Blog

Vector Maps - Introduction

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Background As vector maps have been really successful (see maptiler example) in the last years I want to upgrade my own map and toolchain to fancy new vector tiles technology. This series of blog posts serves mainly to sort out my thoughts and hopefully make life easier for the next guy to try this. This is what the map looks like at the moment: As the process of presenting a vector tile map to… [read more →]

Sensor Monitoring App for Linux/Ubuntu

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I have created a Qt-based app to display and evaluate your computers sensor data using lm-sensors as backend. It's a modern approach using Qt Quick and QML in combination with OpenGL to render high quality graphs. I did it as a proof-of-concept but like to share it anyway. How to install for Ubuntu 13.10: sudo add-apt-repository ppa:henrythasler/pwnsensor sudo apt-get update apt-get install… [read more →]

Upgrade OpenSSL/OpenSSH in an OpenSuse/Apache2 server environment

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I recently read some things about forward secrecy and found that interesting enough to check my webserver installation. SSLLabs has a nice site where you can check your webserver regarding security features/issues with https connections. I got an F grade on my first test and decided I can do better... After reading more stuff (and some more on OpenSSL) I found out, that I probably just needed to… [read more →]

Converting LIDAR-DEM Data to SRTM

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This post is about using special DEM data for map creation. If you have no clue what DEM data is, read the article on wikipedia first. I use Maperitive to create my own map, optimized for hiking/biking. Right now, Maperitive uses SRTM-1 and SRTM-3 DEM data (HGT-Files). A decent description of SRTM-files can be found at vterrain.org. The Austrian Government (Land Tirol) has published… [read more →]