penpendede's map site

Unless stated otherwise, the source of this site is available at

Please note that this site is not primarily about the actual maps available here but to illustrate ways in which you can use maps and location-related information.

Online Maps

Description Changes
Districts of Bonn 2020-05-30 2020-05-29 city districts limits are taken from and then processed by a tiny shell script you may find interesting.
  • selected districts are shown in color, everything else is dimmed out
METAR (weather) data for airports 2020-09-12 2020-09-13 provides access to wether information for airports worldwide. The source of this project is available at
  • now using a git submodule for airportWeather
OSM Map of Bonn 2020-05-29 2020-05-24 accompanies Installing a tile server on a Raspberry Pi 4
  • use minimized files
  • local, pre-rendered tiles
  • added grayscale rendering
  • maximize button
Porto 2020-05-29 2020-05-24 accompanies Making use of OpenStreetMap
  • use minimized files
  • added grayscale rendering
  • maximize button
  • instead of showing all kinds of POI you can now select it using the layer selector in the upper right corner.
Recycling in Bonn 2020-06-02 2020-06-02 Part of getData.js deals with fixing issues with the original data. Once they are fixed the original script will remain available as it illustrates how command-line tools can be used to fix certain issues with GeoJSON files. -
all stolpersteins from the OSM database 2020-11-13
  • First version that displays all the attributes
2020-11-10 an overview of the thousands of stolperteins that have already been added to the OSM database Using tab separated values instead of geoJSON, considerably reducing the amount of data that needs to be transferred.
Trees in Bonn 2020-05-31 2020-05-31 Visualizes trees in public space (streets, parks) within the city limits of Bonn and provides the species as well as the age (open data, over 60k entries). It also shows how you can visualize such a huge dataset and still have Leaflet render it very rapidly. It uses open data from released under CC0 -

Software used for the maps

For what I have been using for the above maps see

Maps with QGIS

QGIS is a free and open source geographic information system for the desktop that is available for many platforms.

Description Changes
Stolpersteine in Bonn 2020-06-10 2020-06-10

A QGIS project that has all stolpersteine in Bonn. The GeoPackage file was generated using QGIS and a cute plugin that queries the OSM database. Description how to generated it will follow soon. For now you can

You don't already have QGIS? No problem, it is available for most platforms at