Deploying Open Source Geospatial Software – Part 1: Challenges

My blog has been quiet for some time. As many of us I’ve been busy doing projects, all involving Open Source Geo (OSGeo) software. Partly development, writing software, I love it, but also more and more in “what comes next”: deploying and maintaining “the application” with all of its dependencies. For…

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Unlocking Sensor Data – I’ll send an SOS to the world

Revealing: the title refers, for the younger readers, to a great 1979-hit by The Police as expanded below. To be played at the loudest possible volume. If you don’t see anything here below try the YouTube link directly: https://www.youtube.com/watch?v=MbXWrmQW-OE. One of the main aspects that glues the OSGeo-world together are OGC-standards: WMS, WFS,…

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GPS Hiking and The Evolution of Navigation

On sunday August 25, 2015 I provided a talk/workshop for a local knowledge network of friends and acquaintances in Amsterdam. TLDR; see gps.justobjects.nl.  Originally, I would talk about “Hiking with GPS”. But as I started pondering about this subject I decided to broaden the content to include also the evolution of navigation.…

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JPEG is Dead, Long Live JPEG!

TL;DR: see this GitHub issue for summary (Dutch but the pictures there and Figure 1 tell the story). Somewhere around 1995, building my first website, it was already quite a feat to embed images. Non-aware of image-formats I played with (animated!) GIF and JPEG. Naively image-editing I noticed that my JPEGs became worse and…

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Tales from Topographic Lowlands

As far as Open geo-data is concerned, the Netherlands goes through prosperous times: country-wide datasets for detailed topography (BRT, BGT), buildings and addresses (BAG), 0.5m elevation data (AHN2) and many more are available for download. Even 3D-versions for several of these datasets are upcoming. These and other nuggets can be found and downloaded via our national geo-portal:…

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Into the Weather – Part 3 – Publishing Data to the Cloud – 1

In my last post, Into the Weather – Part 2, I outlined a global architecture of a Davis Vantage Pro2 weather station connected to a Raspberry Pi  (RPi) running weewx weather software to capture raw weather data. Here I will try to depict how to bring this weather data “from the fluffy clouds into the digital cloud”.  Finally,…

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Into the Weather – Part 2 – Fun with Raspberry Pi

This is a follow-up to “Into the Weather – Part 1 – Exploring weewx”. Sorry, still almost no geospatial content for now. To recap: I am trying to setup an infrastructure where measurements from a Davis Vantage Pro2 Weather Station are collected and exposed to web services, most notably OGC Services like…

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Into the Weather – Part 1 – Exploring weewx

Tagging this post as “Part 1”  is ambitious. Beware: there is hardly any “geo” for now. In the coming time I hope to share some technical experiences with weather stations, weather software and ultimately exposing weather data via some open geospatial standards like OGC WMS(-Time) as in example image right, WFS and…

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