# px     py   pz   DEMFileName 
# Strip DEM - [px py pz] =Coordinates aligned with the reference DEM (reference in bundle adjustment). 
       -0.35        -0.65        -3.34  /home/chunlidai/blue/data/ArcticDEMdata/arcticdem_34_alaska_north//WV01_20130315_1020010022DAB500_1020010020A70C00_2m_lsf_seg1_meta.txt 
        1.63         1.49         5.45  /home/chunlidai/blue/data/ArcticDEMdata/arcticdem_34_alaska_north//WV02_20130403_103001002014FA00_1030010021CD9100_2m_lsf_seg1_meta.txt 
        2.35        -0.98         4.44  /home/chunlidai/blue/data/ArcticDEMdata/arcticdem_34_alaska_north//WV02_20140312_103001002D376900_103001002E880E00_2m_lsf_seg1_meta.txt 
       -2.27         1.76        -1.63  /home/chunlidai/blue/data/ArcticDEMdata/arcticdem_34_alaska_north//WV03_20150513_104001000BC50400_104001000CC68D00_2m_lsf_seg1_meta.txt 
       -1.58        -2.73        -3.40  /home/chunlidai/blue/data/ArcticDEMdata/arcticdem_34_alaska_north//WV02_20160703_10300100576DE300_103001005916A300_2m_lsf_seg1_meta.txt 
       -0.69        -0.71        -2.09  /home/chunlidai/blue/data/ArcticDEMdata/arcticdem_34_alaska_north//WV02_20170515_1030010069D3A400_1030010069052700_2m_lsf_seg1_meta.txt 
       -5.30         3.70        -0.80  /home/chunlidai/blue/data/ArcticDEMdata/arcticdem_34_alaska_north//WV01_20170516_102001006492EE00_1020010060081700_2m_lsf_seg1_meta.txt 
        0.37         0.48         2.40  /home/chunlidai/blue/data/ArcticDEMdata/arcticdem_34_alaska_north//WV02_20180426_103001007D718900_103001007ED6EE00_2m_lsf_seg1_meta.txt 
        2.20        -0.68        -0.19  /home/chunlidai/blue/data/ArcticDEMdata/arcticdem_34_alaska_north//WV01_20181004_1020010079AFEA00_102001007D602E00_2m_lsf_seg1_meta.txt 
       -0.83        -3.49        -0.73  /home/chunlidai/blue/data/ArcticDEMdata/arcticdem_34_alaska_north//WV01_20190304_1020010084452500_102001008381B900_2m_lsf_seg1_meta.txt 
        1.28        -2.55         3.21  /home/chunlidai/blue/data/ArcticDEMdata/arcticdem_34_alaska_north//WV01_20190328_102001008056E100_102001008245F300_2m_lsf_seg1_meta.txt 
        3.18         4.36        -3.31  /home/chunlidai/blue/data/ArcticDEMdata/arcticdem_34_alaska_north//WV02_20200508_10300100A5527E00_10300100A6B59F00_2m_lsf_seg1_meta.txt