LPL30-A multilevel dataset of landform mapping and geomorphologic descriptors for the Loess Plateau of China

Supplementary for “A multilevel dataset of landform mapping and1 geomorphologic descriptors for the Loess Plateau of China”2 3 Sijin Li1,2,3, Liyang Xiong1,2,3,*, Yue Li1,4, Xin Yang1,2,3, Fayuan Li1,2,3, Guoan Tang1,2,3 4 1School of Geography, Nanjing Normal University, Nanjing 210023, China5 2Key Laboratory of Virtual Geographic Environment (Nanjing Normal University), Ministry of Education, Nanjing 210023, China6 3Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application, Nanjing7 210023, China8 4Provincial Geomatics Centre of Jiangsu, Nanjing 210023, China9 Correspondence to: Liyang Xiong ([email protected])10 11 This supplementary includes:12 Table S1-413 14 Table S1. Landform classification objects and criteria based on morphological characteristics15 Criteria Morphological characteristic-based classification Level 1 (MC_L1) Code in MC_L1 Criteria Morphological characteristic-based classification Level 2 (MC_L2) Code in MC_L2 TRI <= 30 m Slope <= 3° Plain 1 Elevation <= 1000 m Low-altitude plain 101 1000 m < Elevation <3 500 m Middle-altitude plain 102 3500 m < Elevation < 5000 m High-altitude plain 103 TRI > 30 m Slope <= 3° Tableland 2 Elevation <= 1000 m Low-altitude tableland 201 1000 m < Elevation < 3500 m Middle-altitude tableland 202 30 m < TRI <= 200 m Slope >3° Hill 3 Elevation <= 1000 m Low-altitude hill 301 1000 m < Elevation < 3500 m Middle-altitude hill 302 3500 m < Elevation < 5000 m High-altitude hill 303 TRI > 200 m Slope > 3° Mountain 4 Elevation <= 1000 m 200 m < TRI <= 500 m Low-altitude low-relief mountain 411 Elevation <= 1000 m 500 m < TRI <= 1000 m Middle-altitude low-relief mountain 412 1000 m < Elevation < 3500 m 200 m < TRI <= 500 m High-altitude low-relief mountain 413 1000 m < Elevation < 3500 m 500 m < TRI <= 1000 m Low-altitude middle-relief mountain 421 1000 m < Elevation < 3500 m 1000 m < TRI <= 2500 m Middle-altitude middle-relief mountain 422 3500 m < Elevation < 5000 m 200 m < TRI <= 500 m High-altitude middle-relief mountain 423 3500 m < Elevation < 5000 m 500 m < TRI <= 1000 m Middle-altitude high-relief mountain 432 16 Table S2. Landform classification objects and criteria considering dominant forces17 Criteria Dominant forces-based classification Level 1 (DF_L1) Code in DF_L1 Criteria Dominant forces-based classification Level 2 (DF_L2) Code in DF_L2 AS > AAT Gully (GU) 0 GDD <= 0.55 GID <= 100 Shallow narrow gully 11 GDD <= 0.55 GID > 100 Deep narrow gully 12 GDD > 0.55 GID <= 100 Shallow wide gully 21 GDD > 0.55 GID > 100 Deep wide gully 22 AS <= AAT Inter-gully (IG) 1 Slope <= 6° Flat inter-gully 31 6° < Slope <= 15° Gentle inter-gully 32 Slope > 15° Steep inter-gully 33 AAT represents the automated adaptive threshold18 19 20 Table S3. Landform classification incorporating surface material21 Criteria Dominant forces-based classification Level 1 (DF_L1) Code in SM_L1 Criteria Dominant forces-based classification Level 2 (DF_L2) Code in SM_L2 Loess cover areas Loess landform 1 Same as the criteria of DF_L1 GU Loess gully 11 TRI <= 30 m, Slope <= 3°, and do not intersect with the river network Loess tableland 12 Depression on the reverse terrain and [no peak point or (1 peak point and no saddle point)] Loess ridge 13 Depression on the reverse terrain and not loess ridges Loess hill 14 Rock cover areas Rock landform 2 30 m < TRI <= 200 m Slope >3° Rock hill 21 TRI > 200 m Slope > 3° Rock mountain 22 22 Table S4. Brief overview of the elements and their name, format, and meaning in LPL30 Type File name Format Meaning Basic derivatives LP_boundary Shpfile polygon The boundary of the Loess Plateau LP_DEM TIFF 32 bit float The digital terrain model of the Loess Plateau LP_slope Slope calculated based on LP_DEM LP_AS Accumulated slope LP_TRI Terrain relief index based on the new method in this study LP_GU_Dissection Gully dissection degree LP_GU_Incision Gully incision depth Analysis units Grid_L* Shpfile polygon Grid units with different levels Mountain_L* Mountain units with different levels Watershed_L* Watershed units with different lelvels Landform classification results MC_L1 TIFF 4 bit integer Level 1 results of landform classification based on the morphological characteristics MC_L2 TIFF 32 bit integer Level 2 results of landform classification based on the morphological characteristics DF_L1 TIFF 2 bit integer Level 1 results of landform classification considering dominant forces DF_L2_GU TIFF 2 bit integer Level 2 results of gully classification DF_L2_IG TIFF 16 bit integer Level 2 results of inter-gully classification SM_L1 TIFF 2 bit integer Level 1 results of landform classification incorporating surface material SM_L2 TIFF 4 bit integer Level 2 results of landform classification incorporating surface material Landform pattern descriptors Grid_L*_DF_L1_Ds Shpfile polygon Descriptions for calculating the DF_L1 result based on grid units Grid_L*_DF_L2_GU_Ds Descriptions for calculating the DF_L2_GU result based on grid units Grid_L*_DF_L2_IG_Ds Descriptions for calculating the DF_L2_IG result based on grid units Grid_L*_MC_L1_Ds Descriptions for calculating the MC_L1 result based on grid units Grid_L*_MC_L2_Ds Descriptions for calculating the MC_L2 result based on grid units Grid_L*_SM_L2_Ds Mountain_L*_DF_L1_Ds Descriptions for calculating the DF_L1 result based on mountain units Mountain_L*_DF_L2_GU_Ds Descriptions for calculating the DF_L2_GU result based on mountain units Mountain_L*_DF_L2_IG_Ds Descriptions for calculating the DF_L2_IG result based on mountain units Mountain_L*_MC_L1_Ds Descriptions for calculating the MC_L1 result based on mountain units Mountain_L*_MC_L2_Ds Descriptions for calculating the MC_L2 result based on mountain units Mountain_L*_SM_L2_Ds Descriptions for calculating the SM_L2 result based on mountain units Watershed_L*_DF_L1_Ds Descriptions for calculating the DF_L1 result based on watershed units Watershed_L*_DF_L2_GU_Ds Descriptions for calculating the DF_L2_GU result based on watershed units Watershed_L*_DF_L2_IG_Ds Descriptions for calculating the DF_L2_IG result based on watershed units Watershed_L*_MC_L1_Ds Descriptions for calculating the MC_L1 result based on watershed units Watershed_L*_MC_L2_Ds Descriptions for calculating the MC_L2 result based on watershed units Watershed_L*_SM_L2_Ds Descriptions for calculating the SM_L2 result based on watershed units * represents 1 to 4