So I'm working on a project for my professor where we are plotting survey points and he asked me to make contours out of the points we've plotted. However, the data doesn't have any elevation, only values for things like lithic count. It's also not in any coordinate system. He mostly just wants me to represent how much lithic material is at each survey point, and he wants me to do this graphically. Would a contour be best suited for this? Should I use a different tool? Can I even make a contour without any of the elevation data?