I first used this kind of map for my book project. I was constantly pulling out a copy of the Nicholas Morgan/J. B. Ireland Pioneer Map of Great Salt Lake City to see where someone lived, and figured it would be useful to plot my data in one central location. I now have seventy data points on a map about Early Black Utah/Mormon History and may make it available to the public at some point. It has been very useful to me to see where people lived in relation to one another, and to historical events.
Here's the Sidney Tanner map.
As noted, it is "in progress." A couple of the locations are exact, to the very foot, such as Fort San Bernardino, but some are more general and could stand some additional research. In the process of making the map, I discovered that I cannot see Sidney Tanner's home at 195 E. 200 North in Beaver although it was on the National Register of Historic Places and noted to be in excellent condition.
Does anyone know about the home? Is it this one, significantly altered?