  Digital Earth was born with the aim of replicating the real world within the
digital world. Many efforts have been made to observe and sense the Earth, both
from space and by using in situ sensors. Focusing on the latter, advances in
Digital Earth have established vital bridges to exploit these sensors and their
networks by taking location as a key element. The current era of connectivity
envisions that everything is connected to everything. The concept of the
Internet of Things emerged as a holistic proposal to enable an ecosystem of
varied, heterogeneous networked objects and devices to speak and interact with
each other. To make the IoT ecosystem a reality, it is necessary to understand
the electronic components, communication protocols, real-time analysis
techniques, and the location of the objects and devices. The IoT ecosystem and
the Digital Earth jointly form interrelated infrastructures for addressing
modern pressing issues and complex challenges. In this chapter, we explore the
synergies and frictions in establishing an efficient and permanent
collaboration between the two infrastructures, in order to adequately address
multidisciplinary and increasingly complex real-world problems. Although there
are still some pending issues, the identified synergies generate optimism for a
true collaboration between the Internet of Things and the Digital Earth.
