The Belfast Hills Partnership has been working with Google to offer walking trails on the web and the result is now available through Google Maps’ Street View function.
The only sota summit at present is Divis GI/AH-004 which can be viewed from this link or on Google Maps.
http://belfasthills.org/visiting/divis/
Not sure if this has been introduced in other areas but now with this function it will make it possible to judge a summit walk before you do it.
Darrell