It will be interesting to see what comes out of the Northumberland & Durham Rock Art Project, because its not just logging the motifs, its also looking at RA in the context of how it fits in the landscape. The recording document is comprehensive to say the least (7 Pages) & the type of stuff being recorded is:
Panel dimensions, orientation & aspect
Type of rock; erratic, bedrock, part of structure
Location: hill top, valley, hillside, shore etc
Proximity to water:
Is the water: river, spring, sea etc.
Views from RA
Type of rock
Whether the rocks got fissures / visible bedding
Components of the rock; quartz, feldspar, mica
Grain size
Motifs
Sketches of the RA
Scale sketches of immediate area, including other monuments, water, rocks with natural markings or fissures.
Current condition & threats to the RA
If the data is pulled together & analysed properly, I'll be absolutely stunned & saddened for that matter if some new theories don't emerge.