Modeling the slope of my yard

Hi, I’m trying to model the slope of my yard on the free version. I see lots and lots of references to the “sandbox” tool, but it doesn’t seem available in Sketchup Web Free.

I have about a 30ft x 30ft area I staked out and used a line level to get the rise over a run of 10ft. I have these data points all written down. I mapped the points on my model and started connecting them with lines to make a rectangle.

  1. All but one of the lines failed to make a closed rectangle. This is shown in the screenshot on the top down view. I only took measurements away from the house to the furthest guidepoint (each guidepoint is 10 ft).
  2. The side view screenshot shows some of the elevations. Am I right in thinking that I cant connect these rectangles because the plane I’m drawing isn’t flat relative to the axis?
  3. I bet there is a better way to do this, but how?

I can only add one model so I compromised on an angle that would show the elevation of my guide points connected by lines and also the one rectangle that did complete after I connected the four corners of the square.

You will need to triangulate the sloping faces. A rigid piece of plywood can only slope in one direction. If you want to slope it in two you need to bend it.

Similar to SketchUp you’ll have connect corners to get things to follow a bend in multiple directions.