1. Retired; formerly, National Geodetic Survey (NGS), National Oceanic and Atmospheric Administration (NOAA), 3510 Flowerfield Dr., Potomac, MD 20854. ORCID: .
2. Professor, Center for Research on High Performance Remote Sensing and Urban Informatics, Dept. of Civil Engineering, National Taiwan Univ., 1 Sec. 4, Roosevelt Rd., Taipei 10617, Taiwan (corresponding author). ORCID: .