Abstract: A system and method for event mapping and analysis utilizes a portable event logging device including a geo-locating device, a processor and a plurality of dedicated event logging keys associated with unique event states. In use, a user utilizes the dedicated event logging keys to record event state data, such as a positive detection of explosives residue. The event state data is recorded as an event specific data set with associated geographic location data from the geo-locating unit. Additional data, such as bar code data recorded by an indicia reader of the logging device, is stored with the event specific data set. A collection of event specific data sets is uploaded into a computer system where it is processed and presented in the form of a map to reveal patterns and trends in event states, such as the presence of explosives residue in a particular geographic region.