# px     py   pz   DEMFileName 
# Strip DEM - [px py pz] =Coordinates aligned with the reference DEM (reference in bundle adjustment). 
       -4.65        -5.80         3.38  /home/chunlidai/blue/data/ArcticDEMdata/arcticdem_34_alaska_north//WV01_20131130_10200100285D2C00_1020010027167200_2m_lsf_seg1_meta.txt 
       -2.08        -4.08         0.91  /home/chunlidai/blue/data/ArcticDEMdata/arcticdem_34_alaska_north//WV02_20160625_1030010057837800_10300100585AB000_2m_lsf_seg1_meta.txt 
        0.96         6.69        -1.94  /home/chunlidai/blue/data/ArcticDEMdata/arcticdem_34_alaska_north//WV02_20180421_103001007B575100_103001007B9C0800_2m_lsf_seg1_meta.txt 
       -3.36        -2.24        -0.55  /home/chunlidai/blue/data/ArcticDEMdata/arcticdem_34_alaska_north//WV01_20190718_10200100883CF500_102001008C613F00_2m_lsf_seg1_meta.txt 
        1.75         2.65        -1.81  /home/chunlidai/blue/data/ArcticDEMdata/arcticdem_34_alaska_north//WV01_20200511_1020010092965200_1020010096C3B300_2m_lsf_seg1_meta.txt