Building footprint (IMAGE) The University of Hong Kong Caption Building footprint (left, source: META) and land cover classification (right, source: ESA WorldCover) in the same area of North California Credit The University of Hong Kong Usage Restrictions N/A 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.