Dead Reckoning Navigation
Family friend Don is a pioneer in the mapping industry. He recently got an ETAK system up and running again. It used dead reckoning from a car's wheels to map streets!
posted by Peter at 7:41 AM
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This system was a blast to finally kick-start to life again after many years of storage. The digital map data is stored on high-capacity 4-track data cassettes, each holding about a city's-worth of street data. You can see the tape drive at the bottom of the living room photo.
The monitor screen isn't a raster-scan screen--it's vector-driven, so the lines of the streets are very crisp and bright. It's big: 7-inches diagonally. These were designed to be mounted in commercial vehicles, mostly. Smaller (4-inch?) ones were marketed for passenger cars.
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