Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Definition of k-neighborhood (A) and linked point segment (B). The dots represent sequentially observed GPS points, with the dark dots being those within the same spatial cluster and the white dots being outside of the cluster. Note that the spatial location information of each point was removed so that they were ranked by the temporal sequence only.
