Google Maps
To open the "Google Maps" window:
- click 
 button of the
    Atlas of Cities (the map will be opened
    with the selected city), or
 - click 
 button of the
    Your Location window, or
 - select 
 menu item of the
    Geographical Map tableau
    (the map will be opened on the mouse point).
 
The Internet connection should be established.
The Google Maps allows to get (and set) geograpfical coordinates with accuracy
   of centi-arcsecods (30 cm).
It's possible to shift and zoom of chart (by special tool, by double mouse click, by mouse wheel),
to select a chart mode: normal with roads, satellite image,
hybride (satellite image plus roads) etc..
Thq "Google Maps" window have following operational buttons:
- Set map to "Your Location"
- Set map to "Source Data"
- Set map to "Background Data"