# px     py   pz   DEMFileName 
# Strip DEM - [px py pz] =Coordinates aligned with the reference DEM (reference in bundle adjustment). 
       -0.30         0.30        -1.51  /home/chunlidai/blue/data/ArcticDEMdata/arcticdem_34_alaska_north//W1W1_20120414_102001001A4ED700_102001001AA43E00_2m_lsf_seg1_meta.txt 
        2.86        -0.64         1.49  /home/chunlidai/blue/data/ArcticDEMdata/arcticdem_34_alaska_north//WV02_20120605_1030010019B93800_1030010019C1FC00_2m_lsf_seg1_meta.txt 
        0.15        -0.33        -0.00  /home/chunlidai/blue/data/ArcticDEMdata/arcticdem_34_alaska_north//WV01_20170319_102001005D829500_102001005D0A9600_2m_lsf_seg1_meta.txt 
       -3.24         1.01         1.84  /home/chunlidai/blue/data/ArcticDEMdata/arcticdem_34_alaska_north//WV02_20180430_103001007CAF4D00_103001007B1E1E00_2m_lsf_seg3_meta.txt 
        0.53        -0.33        -1.82  /home/chunlidai/blue/data/ArcticDEMdata/arcticdem_34_alaska_north//WV01_20200309_102001009156CF00_1020010090722200_2m_lsf_seg1_meta.txt