: Yellow signals that may require a higher-quality indoor or attic antenna.
: Calculations on the map assume an outdoor antenna mounted 30 feet above ground level.
The Channel Master State Map Index uses a proprietary algorithm to provide clean compass orientations and antenna matching tools.
The web program uses mathematical models to estimate broadcast coverage. It assumes an outdoor antenna is mounted 30 feet above ground level.
While DTV.gov maps are the industry standard for predictions, they are simulations, not guarantees. Several factors can cause reality to differ from the map:
The maps were a silent documentation of a digital diaspora. They showed you the shape of obsolescence. The cities—the places with money, with tall broadcast towers, with line-of-sight—were dense clusters of green. The rural corridors, the deep valleys, the forgotten spaces between interstates: they were white. Empty. Terra nullius of the spectrum.
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