This work in progress aims to map the hertzian space created by the United States' mass media broadcast stations. This space is not definable in the traditional terms of the surveyed boundaries of state and federal territories, but rather by electrical field strengths and consumer markets. Geospatial data provided by the Federal Communications Commission is rendered as translucent shapes whose color is determined by the type of service (AM/FM/TV). The project is planned as a series of print atlases as well as a web-based, interactive map database. More information.