Yard map, Elevation / Slope of yard

I have built out my yard map, identified the sprinkler head type and location, type of soil, type of grass, level of sun, level of slope, but no where did it ask where the high points are, low points and middle of my yard. Certain areas are getting to wet without me manually accounting for water flow. Seems like this would be a good question to ask as part of the definition of the yard. Where are the high, middle and low points of each zone?