This portion of the self-evaluation is designed to test your knowledge of marking the Extended Features Set (EFS) cores and delta features. Please review the image on the right canvas and mark the cores and deltas.

To mark a core:

Find the most curved section of an innermost recurving ridge and visualize the circle it is a part of. Identify the circle's center point and click to mark the core location, then drag along the ridge flow for the core's direction. Click a second time to indicate a radius of uncertainty: the distance you click from the core's center point will be the radius. Use the Delete tool to remove any mistakes.

To mark a delta:

After selecting the delta tool, identify the location of the delta, where three directions of ridge flow converge. Click there and drag toward the most upward of the three directions. Click again to place the leftward direction of flow, then again for the rightward. Use the Delete tool to remove any mistakes.