Emit #1 – Into Spatiotemporal

One of my new year’s resolutions for 2018 was to “blog more”. Not being very active on the well-known social media: a bit tired of Twitter, never really into Facebook, bit of LinkedIn.  OSGeo mailing lists, GitHub and Gitter is where you can find me most (thanks Jody, for reminding!). And…

Continue reading

Dances with the GeoPython Tribe

During June 21-24, 2016 I attended the very first GeoPython Conference in Basel Switzerland. This event was organized by the Institute of Geomatics Engineering of the FHNW – University of Applied Sciences and Arts Northwestern Switzerland and PyBasel, the local Python User Group Northwestern Switzerland. In particular I should mention key-organizer  Martin…

Continue reading

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…

Continue reading

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,…

Continue reading

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.…

Continue reading

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…

Continue reading

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:…

Continue reading

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,…

Continue reading