黄土高原边界shapefile文件， WGS_1984_Albers
Projected Coordinate System: WGS_1984_Albers
Projection: Albers
False_Easting: 4000000.00000000
False_Northing: 0.00000000
Central_Meridian: 105.00000000
Standard_Parallel_1: 25.00000000
Standard_Parallel_2: 47.0000
