[REVIEW] 审核/整理/更新“地学数据集”一章

[seisman]

• source/dataset/PB2002/PB2002.sh @seisman Polish the PB2002 dataset #1208
• source/dataset/PB2002/PB2002_boundaries.dig.txt @seisman Polish the PB2002 dataset #1208
• source/dataset/PB2002/PB2002_plates.dig.txt @seisman Polish the PB2002 dataset #1208
• source/dataset/PB2002/index.rst @seisman Polish the PB2002 dataset #1208
• source/dataset/dcw/dcw-countries.txt
• source/dataset/dcw/dcw-states.txt
• source/dataset/dcw/dcw.png
• source/dataset/dcw/index.rst
• source/dataset/earth-age.rst
• source/dataset/earth-faa.rst
• source/dataset/earth-geoid.rst
• source/dataset/earth-images.rst
• source/dataset/earth-mag.rst
• source/dataset/earth-mask.rst
• source/dataset/earth-relief.rst
• source/dataset/gadm/gadm_level0.pdf
• source/dataset/gadm/gadm_level0.png
• source/dataset/gadm/gadm_level0.sh
• source/dataset/gadm/gadm_level1.pdf
• source/dataset/gadm/gadm_level1.png
• source/dataset/gadm/gadm_level1.sh
• source/dataset/gadm/gadm_level2.pdf
• source/dataset/gadm/gadm_level2.png
• source/dataset/gadm/gadm_level2.sh
• source/dataset/gadm/index.rst
• source/dataset/global_tectonics/boundaries.sh. @seisman Polish the global_tectonics dataset #1211
• source/dataset/global_tectonics/global_gprv.sh @seisman Polish the global_tectonics dataset #1211
• source/dataset/global_tectonics/index.rst @seisman Polish the global_tectonics dataset #1211
• source/dataset/global_tectonics/plates.sh @seisman Polish the global_tectonics dataset #1211
• source/dataset/gshhg.jpg @seisman Polish the GSHHG section #1209
• source/dataset/gshhg.rst @seisman Polish the GSHHG section #1209
• source/dataset/index.rst
• source/dataset/usage.rst