21.Rail map of the Qinghai Lake Basin (2000)

       POLES TPDC

    22.Primary road network dataset of north slope of Tianshan River Basin (2000)

       POLES TPDC

    23.1:250000 railway distribution data set of Qaidam River basin (2000)

       POLES TPDC

    24.1:250000 road distribution dataset of Qaidam River basin (2000)

       POLES TPDC

    25.Primary road network dataset of the Heihe Rriver basin (2010)

       POLES TPDC HEIHE

    26.Rail map of Heihe River Basin

       POLES TPDC HEIHE