1. BUILD

At first you need to install QGeoView library from https://github.com/AmonRaNet/QGeoView
When make sure what you have installed Qt5/6 with development packages.

ABB uses cmake building system, so steps as usual:
  * mkdir build
  * cd build
  * cmake ..
  * make

2. USE

Application loads online map from OSM servers. But you need to have list of cameras local on your machine.
It must be map files in OSM format (*.osm). Currently supported only xml-based files, not *.pbf.
There are several ways to obtain data:
  * OSM main page (www.openstreetmap.org), use link "Export" in th header
  * map editor (fo example JOSM). Download area to edit, than save as *.osm file
  * Overpass tools, online or API. It allows to get only required data, not entire map

Then just click "File" in menu and choose *.osm file to open.