Here’s my crude way of overlaying old maps and current maps . Get your old map with roads , home locations etc , then get a piece of tracing acetate (paper) , lay it on your old map and trace it roads homesites , whatever you want to find . Now go to your computer and pull up google earth of the area. Tape the tracing paper on the computer screen and move , zoom in or out to line up the google earth image to your tracing of the old map and get the best possible match. I use roads and intersections of roads.Drag the push pin icon to each location you want to find and you’ll get a GPS coordinate. You’ll be amazed how accurate the old maps can be and therefore how accurate the GPS cord will be . Hope this helps. MAGA and KAG