Next: CircularTrip Based Continuous NN Up: Grid Access Methods Previous: ArcTrip Contents
In this chapter we have presented a novel access method CircularTrip which returns the cells according
to their proximity to 
. We also presented ArcTrip which can be considered a more general form of
CircularTrip and we will show in next chapters how these two access methods can be used to efficiently
monitor 
NN queries, constrained NN queries and other variants.