# px     py   pz   DEMFileName 
# Strip DEM - [px py pz] =Coordinates aligned with the reference DEM (reference in bundle adjustment). 
       -0.56        -0.34        -1.21  /home/chunlidai/blue/data/ArcticDEMdata/arcticdem_34_alaska_north//WV01_20130407_102001001F064E00_102001002064BD00_2m_lsf_seg6_meta.txt 
        0.00         0.00         2.91  /home/chunlidai/blue/data/ArcticDEMdata/arcticdem_34_alaska_north//WV02_20170314_10300100657DFA00_1030010065C65B00_2m_lsf_seg1_meta.txt 
        0.56         0.34        -1.70  /home/chunlidai/blue/data/ArcticDEMdata/arcticdem_34_alaska_north//WV02_20170328_1030010067106300_10300100664F7A00_2m_lsf_seg2_meta.txt