Defining the reconstruction

…So you've tracked your footage, and…you think you've successfully solved your camera.…But you're still not finished yet.…There's one more step.…We need to define a reconstruction.…To show you what I mean, let's go into four up view here and…you'll see a bunch of points that exist in 3D space.…But if I dial you out here in the top view, you can see my camera and…everything else is way kind of all over the place.…Now, I need to better define exactly where we are in this 3D world.…

So that it better fits within our 3D world, so let's go ahead and…jump back into the perspective view.…And there are two different tags we're going to use to figure out…exactly where everything is set up.…So the first thing you should do is select your Motion Tracker.…And then with Motion Tracker selected, go ahead and right click and…go to the Motion Tracker Tags area.…There are two different tags we're going to set up.…The first tag is the Planar Constraint tag.…This is going to allow us to define our ground plane.…

Go ahead and choose that, and you'll see a triangle that appears in the window.…