a time finding nodes with same point of interest to redirect all child links of lower priority node to higher priority node among the same point of interest nodes and delete link between the same point of interest nodes creating geometry relationship based on above new arrangement application_number US 38580409 A description in the following description like parts are marked with the same reference numerals throughout the specification and drawings a method of the present invention are for integrating two fields attached to a road segment including a road name and a point of interest in map database of navigation system the method for integrating road names is firstly described as follows a u2018 road entity u2019 is defined as a collection of discrete digital map road segments sharing one road name however it happens but not unusual that a new highway 11 as shown in fig1 is introduced between an existing road segment 12 and thus the road segment 12 is sliced into two disjoint sets i e 121 and 122 of road segment in fig1 it also shows situations that two disjoint road segments 131 132 with the identical road name and three road segments 141 142 143 having the same road name due to road realignment.