The following maps are available for the Yan River Basin.

No.	Files	Format	Name	Description	Projection	Compiled by
1	Land use, 1990	ARCGIS(coverage)		Extracted from TM 1990	Albers	Li Rui, Yang Qinke, and Zhang Xiaoping
2	Land use, 2000	ARCGIS(coverage)		Extracted from TM 2000	Albers	Yang Qinke and Li Rui
3	s12-yhbnd	ARCGIS(coverage)		Extracted from DEM (s12-yhdem25)	Albers	Liang Wei and Yang Qinke
4	DEM	ARCGIS(grid)		Scale: 1:50000 (resolution: 25m)	Albers	Yang Qinke, Li Rui and Wen Zhongming
5	County boundaries	ARCGIS(coverage)			Albers	Liang Wei and Yang Qinke
6	Land use type, 1997	ARCGIS(grid)		Extracted from TM 1997	Albers	Yang Qinke, Li Rui and Liang Wei
7	Land use type, 2000	ARCGIS(grid)		Extracted from TM M+ 2000	Albers	Yang Qinke, Li Rui and Liang Wei
8	Evaporation	ARCGIS(grid)		ANU spline interpolation	Albers	Liang Wei and Yang Qinke
9	Annual rainfall	ARCGIS(grid)		ANU spline interpolation	Albers	Liang Wei and Yang Qinke
10	Annual temperature	ARCGIS(grid)		ANU spline interpolation	Albers	Liang Wei and Yang Qinke
11	Soil	ARCGIS(coverage)			Albers	Yang Qin Ke and Liang Wei