  We present a compact data structure to represent both the duration and length
of homogeneous segments of trajectories from moving objects in a way that, as a
data warehouse, it allows us to efficiently answer cumulative queries. The
division of trajectories into relevant segments has been studied in the
literature under the topic of Trajectory Segmentation. In this paper, we design
a data structure to compactly represent them and the algorithms to answer the
more relevant queries. We experimentally evaluate our proposal in the real
context of an enterprise with mobile workers (truck drivers) where we aim at
analyzing the time they spend in different activities. To test our proposal
under higher stress conditions we generated a huge amount of synthetic
realistic trajectories and evaluated our system with those data to have a good
idea about its space needs and its efficiency when answering different types of
queries.
