<P> In step 2, IDs are generally assigned sequentially as entities of each type are encountered . Any changes made to the input database from one version to another will affect the assignment of IDs to all entities . Consequently, there is little expectation of continuity in the assignment between versions . </P> <P> In step 3 each applied index allows the database to be quickly searched in a specific manner . One index set applied to links can be sorted by the alphabetic order of the street names of the links . Another index set applied to links can be sorted according to the nodes to which they are connected to facilitate route planning . Yet another index set applied to nodes can be sorted according to their order of appearance along a road . In some of these cases a binary search can be performed instead of an exhaustive search and in some cases, a search process can be replaced with a simple table lookup . </P> <P> For most navigational functions it is important to have in the vehicle an up - to - date map database, and for some functions it is critical, especially those related to active safety . A common strategy is to transfer update information to the vehicle whenever it becomes available over a wireless channel . The wireless channel might be bi-directional, such as wifi and cellular phone, broadcast, such as satellite radio, FM sub-carrier or ATSC datacasting, or a combination of both . In any case it would be impractical or extremely inefficient to transmit the entire new database to replace an existing version, since it is likely to be several gigabytes in size . </P> <P> Instead it is desirable to transfer just that information related to changes made to the existing database . A major difficulty is that any change made to the content of a map database generally causes changes to all assigned entity IDs and all assigned indices during the compilation process . These new IDs and indices permeate the entire compiled database so that any collection of increments will likely constitute most of the database . To overcome this difficulty, three approaches have been taken, which are briefly 1) onboard compiler 2) look - aside store 3) geographical tiles . </P>

Which of the following is an incorrect match of process to location