Lidar data (IMAGE) Penn State Caption Shell rings in LiDAR data. The rings stand out due to their slope and elevation change compared to the surrounding landscape. Credit Dylan Davis, Penn State Usage Restrictions non commerical use only License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.