# px     py   pz   DEMFileName 
# Strip DEM - [px py pz] =Coordinates aligned with the reference DEM (reference in bundle adjustment). 
       -0.40         0.01         1.72  /home/chunlidai/blue/data/ArcticDEMdata/arcticdem_34_alaska_north//WV01_20130407_102001001F064E00_102001002064BD00_2m_lsf_seg6_meta.txt 
        0.40        -0.01        -2.96  /home/chunlidai/blue/data/ArcticDEMdata/arcticdem_34_alaska_north//WV01_20130414_10200100207C5800_102001002225E100_2m_lsf_seg2_meta.txt 
        0.00         0.00         1.24  /home/chunlidai/blue/data/ArcticDEMdata/arcticdem_34_alaska_north//WV02_20170328_1030010067106300_10300100664F7A00_2m_lsf_seg2_meta.txt