When it comes to new tech, I find Google Earth and Google Earth Pro more useful in many situations than a GPS topo map. This is because the most significant failing of the standard USGS 7.5 quadrangles is their historical nature. They frequently do not show roads and other significant cultural features correctly and the location of trails may be ludicrously inaccurate. GE is a very useful adjunct, although you must do your homework before you are in the field.

I can only say that someone in the USGS devote considerable time and energy to insure that the point of significant interest would fall at the junction of four quadrangle sheets. A mere computer would have been incapable.....