Especially when scanning, it is not only nice to see the "dot"s appeating on the map, it is also nice to - later - investigate what the different transmitters were that were seen. To accomodate that, Qt-DAB-6.10 can se set to generate an output file when using the option to show transmitters on a map on the browser (the configuration window contains a selector top right). Next to that, a small utility was built to read such a file and present different "view"s on the content. Screenshot From 2026-01-24 15-46-39 The mapviewer as it is called, shows a button to load (or reload) a file, the buttons a the bottom specify what one will see While reading the file, the comboboxes are filled with resp. country information, names of channels where DAB data was found, and ensembles. A total view is obtained by touching the button "showAll", the transmitters transmitting data for a given ensemble when selecting the ensemble name, and similarly for the channel. The views (all three of them) can be constrained by selecting a country. If no country is selected there is no constraint. Qt-DAB stores the file(s) in the Qt-DAB-files directory (folder), that is the place where the mapviewer starts to look. One observation on scanning: the "staying time" (the time the software would wait in a channel where DAB data was found) was default set to 10 minutes, which is not a value often required, and gave rise to misunderstandings. The selector for the "staying time" is moved, from the configuration window to the scan handler window (which obviously makes more sense), furthermore the smallest (the default) value now is 20 seconds, increments are also 20 seconds If you do not want to install the two programs in Windows, just unzip the file libraries,zip and run the qt-dab (or mapviewer) versions contained in it Update 31/1 The mapviewer is improved. If you select a country, then the comboboxes contain ONLY the channels resp. the ensemble names that are related to the contry name (Selecting the 0-th element, i.e. "select country" will restore the other comboboxes to contain all channes and ensemble names Update 28/2 It turned - to my surprise - that in Ubuntu the webbrowser could not handle the Json text in which the transmitter data was encoded, such that no transmitters were shown on the map. In the current AppImage that is solved.