Understanding Kotlin’s Higher-Order Functions: map, reduce, and fold
In Kotlin programming, higher-order functions such as map, reduce, and fold offer powerful tools for data manipulation and aggregation. These functions operate on collections, enabling concise and exp... Read More
Android OpenTopoMap Viewer: New Features and Google Play Release
We’ve finally released the OpenTopoMap Viewer app on Google Play. This version is ad-supported. Of course the ad-free FOSS version will continue to be maintained on F-Droid. New features include... Read More
Geotagging Time Lapse Images with Mapillary Tools
Introduction In a previous post we have discussed how to tag MOV video files with Mapillary Tools. To save storage space, or to obtain better picture quality, you may want to use time lapse photos ins... Read More
Geotagging a MOV File with Mapillary Tools
Introduction We can use a Mapillary Tools to extract image stills from video files for upload to Mapillary. Our action cam does not have GPS, so we need to ‘geotag’ the images with a synch... Read More
Matching a Location to a Track using Vector Operations
Introduction Map matching involves the projection of raw geographic coordinates to map data. For instance, we can match recorded GPS data to the actual course of the road, or in real time navigation, ... Read More
Reviving the Classic: Exploring Game Theory with The Prisoner’s Dilemma Web App
In the ever-evolving landscape of web applications, there are timeless classics that continue to captivate and educate users. One such gem from the ’90s is the revival of the educational Java ap... Read More
Map-matched GPX tracks with QMapShack (video tutorial)
Map matching is the process of matching a series of geographic coordinates to a road network. This video explains how to draw map-matched GPX tracks in QMapShack.... Read More
Google TV with a portable monitor and a Chromecast (video tutorial)
In this short video tutorial we’ll show you how to assemble a Google TV from an ARZOPA 15.6 inch monitor and a Chromecast. You’ll also need a couple of USB-C cables, a Mini HDMI to HDMI (f... Read More
Fix ‘Route relation contains too much data’ in routino
When trying to create routino 3.3.3 databases from larger protobuf files in QMapShack we run into the error message ‘Route relation contains too much data’. This can be solved as follows. ... Read More
Android GPX Player
GPX Player is a tool for Android developers that you can use to play GPX tracks on your desktop computer to mock track points on an Android device. Record a GPX or create it with your favorite GIS too... Read More