QNetMap
QNetMap is the library for displaying the map and the objects on it
...QNetMap supports layers so you can mix maps from different servers.
To enrich the map presentation you can draw your own objects in the given coordinates.
The development of the library was supported by "Sintels" LLC (ЗАО "Синтелс" -
http://sintels.ru) and OJSC "T8" (ОАО "Т8" - https://t8.ru). Written by Sergey Shumeyko and Sergey Vasyutin.