Posts By: jonny

Merging GPX tracks with gpx.studio

Using gpx.studio I was able to upload multiple GPX files (using File > Open), then right-click on one of the track tabs and choose ‘Select All‘. Then on the tools on the left choose ‘Merge items together’. I opted for ‘Merge the contents and keep the traces disconnected’ then choose the ‘Merge selection’ button. This… Read more »

Timmy Mallett’s Distances around Ireland

Using the GPX tracks for Timmy’s cycles around Ireland we can determine the total distances travelled. Route Distance (km) Distance (miles) Wild Atlantic Way 3438 2136 Ancient East 1178 732 Northern Ireland 1458 905 All Ireland 6074 3773 Unsurprisingly the elevation gain and loss was more-or-less equal.

Create GPX tracks between 2 points

Graphhopper is an excellent online tool for creating a GPX track between two places or coordinates. Search for the source and destination, adjust the markers if necessary and then use the GPX button to download

Overpass Map of Townlands

We received a request on how someone might display a map of the townlands in County Down. One way to display that map is using Overpass Turbo. The query to display the data is: The result is quite big so go easy on the Overpass servers.

When curl isn’t available inside a container

If troubleshooting inside a container that does not have curl installed and also doesn’t permit installing then an option is to use a curl binary that has been statically compiled. There are a list of curl binaries here download one matching the arch of your container then extract it with e.g. Then copy the extract… Read more »

VPC Flow Logs in Apache Superset via DuckDB

These notes describe loading VPC Flow Logs in parquet format into DuckDB for visual analysis in Apache Superset. I had never used any of these components before but was able to visualise the addresses using the most bandwidth. If time permits I may also look at ntopng or openobserve to see if they allow loading… Read more »

The MapTiler Swindle: Update 2

Wee Jiri got back to me. The message is shown below but for the TLDR; In the paragraph labelled as ‘1’ Jiri & Jadek have redefined the meaning of ‘perpetual’ which you could look up for yourself. In the dictionary I checked I found words such as ‘endless’, ‘uninterrupted’ and ‘never ending’. However MapTiler have… Read more »

The MapTiler Swindle: Update 1

MapTiler got back to me about my assertion that it was unfair to remove download links for older versions of their software that customers had paid for. MapTiler changed their pricing model to a SaaS model so they now benefit from charging customers annually for access to the software, and are forcing customers to upgrade… Read more »