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Home > SONY nav-u > Manual > Adding Overlays from Other Sources/Creating Overlays

Adding overlays from other sources/Creating overlays


An overlay consists of a bmp file and an asc file. The bmp file contains the icon which will appear on the map everywhere where a POI of the type in question is to be found. The asc file contains the POI data.



Please use the standard asc format: one entry per line, no spaces in the formatting:


gps X, gps Y,"comment"




00.0000000,00.0000000,"[ZIP] ExampleOverlayName [PlaceName]"

00.0000000,00.0000000,"[ZIP] ExampleOverlayName [PlaceName]"

00.0000000,00.0000000,"[ZIP] ExampleOverlayName [PlaceName]"



Numbers are to be replaced with the GPS coordinates; X followed by Y

ZIP ? Postal code

ExampleOverlayName ? Name of the overlay, e.g. ?Fish?n?Chip Shops?

PlaceName ? Name of the city/town/village in which the POI is situated.



The data is to be copied into the POI-Warner "pois" subdirectory. If you are using POI-Warner, the program has to be exited afterwards via File > Quit. Then reset the navigation device and start the navigation software. On Restart the new overlays will be converted to the internal POI-Warner format. You can then record new POI with POI-Warner, but these cannot be passed on to third parties, as the POI-Warner has converted the asc files into a different format. This it is necessary to add new POI to your asc file manually if you wish to share your POI collection.


<i style="font-weight: normal;">(POI-Warner 3 viewed in Windows Vista)</i>


* The laws pertaining to the use of speed camera data are not standardised throughout Europe. Please check if the use of such data is legal in the country in which you are driving. In Germany, for example, the use of such data whilst driving is an offence.