Test with starting point at Somerton using research library (N-squared) matching algorithm and cache size 5

Cache is built using a square with sides 20 km. User's path has steps of (2000, 2000) metres, with a total of 11 retrievals. Amount of look-ahead (both E and N) is 15km. Cache size is 5. (Size is set as a fixed value, derived from original size of 123).

Point furthest from the centre of cache (36500000, 14500000) is 3689870, 1549620; distance away is: 10.6405 kilometres.

Results for Somerton (OS 350,130) using research library (N-squared) algorithm and 15 look-ahead
Threshold Total benchmark retrievals Retrievals lost
50% 0 0
20% 1 0
10% 11 5
5% 456 409

Non-default algorithm used was: Context Matcher with N-squared location-matching algorithm: version of Jan 4 2003.

Commentary on this starting point: the cache is centred on non-prime tourist area, but there are prime areas nearby (10 to 30 km).