Test with starting point at Plymouth using default (linear) matching algorithm and cache size 20

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 3km. Cache size is 20. (Size is set as a fixed value, derived from original size of 68).

Point furthest from the centre of cache (25000000, 05600000) is 2517163, 0679755; distance away is: 12.0208 kilometres.

Results for Plymouth (OS 247,053) using default (linear) algorithm and 3 look-ahead
Threshold Total benchmark retrievals Retrievals lost
99% 21 0
98% 42 0
96% 138 38
93% 347 179

Default matching algorithm used was: (version pjb Jan 6b 2003) .

Commentary on this starting point: this may be a favourable case as the cache is centred on an area with lots of attractions, and the area outside the cache has fewer attractions; the cache may, however, be smaller as Plymouth is on the sea, so part of the cache area covers the sea -- which has no tourist attractions.