Edit 2: Am I right in saying SPS only works when camera is facing north? This could make finding the obstacles tough as well.
Edit: Very embarrassed. Didn't read Flights post right about making your own SPS map.
From: Flight
Agh yeah… getting from the outer ring to the inner ring is, by far, the hardest part. You could make a SPS map for the abyss, start walking in a certain directly (just a little bit at a time) and just keep constantly checking for the appropriate colors for the obstacle you want to cross to get to the inner ring. Once in there SPS can surely help you get to the right rift you want to enter.
Hope that springs some ideas.
However, looking through my sps folder there is not one for the abyss so this could be problematic.
Possibly, since usually using the abyss you use the mining, agility, thieving or the one which does not. I believe each of these have its own uptext something like mine down or sneak past. Make a function for each and I *think* you'd be good to go. However, without SPS walking would be difficult.
I'm thinking use radial walking combined with angle changes to be able to constantly walk in the circle of the outer ring.
Judging by this map
http://www.tip.it/runescape/images/maps/abyss.pngI think the distances remain semi constant so something like radial walk to from one obs to another and test the function out for them. Got a little bit excited when I saw this thread :)
I'm still a beginner but I'd love to be involved in the development of this.