# px     py   pz   DEMFileName 
# Strip DEM - [px py pz] =Coordinates aligned with the reference DEM (reference in bundle adjustment). 
        0.00        -0.17        -1.55  /home/chunlidai/blue/data/ArcticDEMdata/arcticdem_34_alaska_north//WV01_20140306_102001002CEA9800_102001002C420E00_2m_lsf_seg1_meta.txt 
        0.00        -0.23        -0.48  /home/chunlidai/blue/data/ArcticDEMdata/arcticdem_34_alaska_north//WV01_20140324_102001002CB39C00_102001002C74BA00_2m_lsf_seg1_meta.txt 
       -0.02         0.01        -0.32  /home/chunlidai/blue/data/ArcticDEMdata/arcticdem_34_alaska_north//WV02_20150322_103001003E44DB00_103001003F8FB000_2m_lsf_seg1_meta.txt 
        0.00         0.14         0.52  /home/chunlidai/blue/data/ArcticDEMdata/arcticdem_34_alaska_north//WV01_20150327_102001003AD45B00_102001003ADF2100_2m_lsf_seg1_meta.txt 
        0.01         0.25         1.83  /home/chunlidai/blue/data/ArcticDEMdata/arcticdem_34_alaska_north//WV01_20170329_102001005E7BEA00_102001005D097500_2m_lsf_seg1_meta.txt