To make it easier to see on screen I have increased the brightness of the chart details. You can see in some of the images that the chart detail are dimmed. This dimmed view is how it will look when displayed. The background chart is only a minor detail, an addition to the main event of the boats and islands. By providing the grid we can see relative movement of the boats. The scale of the piece becomes more apparent with the chart, the users position becomes more known. It moves closer towards the god game simulator that lets the user control and change a landscape from above.
Year 4 - Final Project
I found a simple fix for the fast glitching contours by simply taking a snapshot whenever the users hand is in view the screen only updates when necessary. We can assume that the islands wont move position without a hand there to move it so there is no need to update the contours until another hand comes into view. The result is a very static chart like graphic that fixes in place when the user stands back. As the user interacts the chart shifts and moves, updating as the move islands around. The result is a pronounced visual cue that lets the user know they are interacting with the piece.