1930 realtime map- not to be confused with a GPS.

The GPS has long been a dream, the execution continues to improve.  Steve

1930 realtime map mover.

Iter Avto: The antique route show: The 'sat nav' from 1930 which used a map on a scroll | Daily Mail Online

The device came with a set of paper maps. These were wound from one roll to another across a display and a cable connected to the speedometer controlled the scroll rate. The speed with which the display moved was proportional to the speed of the car so it always showed the correct point

Read more: http://www.dailymail.co.uk/news/article-2147617/Iter-Avto-The-antique-route-The-sat-nav-1930-used-map-scroll.html#ixzz3bFLREOFS
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(2) 1930- Iter Avto: The world's first automobile navigation system.