Abstract: An electronic switch device designed to detect surface contact along a boundary surface. The electronic switch device can be used as an electronic automated game line comprising a very thin game line mat divided between an in-bounds section and out-of-bounds section and further divided into a plurality of grided switches placed directly upon a playing surface such as a tennis court. The game line mat is sufficiently thin and having a top surface suitable for being painted over with the same paint cover used for a conventional playing surface. Surface contact is defined as being in-bounds or out-of-bounds with approximated contact location provided.