The primary contribution of this paper is in a wireless sensor network?s coverage analysis method, which focuses on both the coverage itself and its uniformity and efficiency. Sensor death is typical in the life cycle of a wireless sensor network. Hence it is important to take note of what portion of the target region is monitored by the sensor network both initially and eventually. This paper proposes a useful wireless sensor networks? coverage analysis method, which not only focuses on the coverage itself, but also on its uniformity and efficiency. In the process, several questions such as whether the monitored region is uniformly distributed throughout the target region, or whether there are locations in the target region that are overmonitored, are answered. The paper also specifies for which type of applications the proposed coverage analysis method will be most suitable.