This page allows you to see the average starting point of a fielder against all hitters, in all situations. You may also select a position to zoom in. For example, this link allows you to see second basemen starting position, in 2018, against lefties, with no runners on, and the shift on.
“Depth” is from home plate, in feet. “Angle” is defined as -45° being the 3B line, 0° being up the middle from home plate to center field, and +45° being the 1B line. A shift is defined as when three or more infielders are on the same side of second base.
Read more about how a shift is defined here.