本数据为蒙古共和国地区冻土和季节性冻土的分布及一般属性

  1、数据包括两个图层：其中冻土分区图1:12,000,000，冻土分区包括continuous and discontinuous permafrost, insular and sparsely insular permafrost, sporadic permafrost, and seasonally frozen ground.

  2、冻土类型图1:4,500,000，根据海拔高度、年平均气温、冻土深度、冻融深度、季节性冻土、季节性冻结深度划分为14个类型。

  3、数据包括以下图层：

  cryo_landslide.shp（point locations of cryogenic landslides）、cryo_planation.shp（point locations of cryogenic planation）、dig_country_bnd.shp（digitized country boundary polygon from the 1:4,500,000 map）、dig_lakes.shp（digitized lake polygons from the 1:4,500,000 map）、treams.shp （digitized stream vectors from the 1:4,500,000 map）、geocryo_regions.shp （digitized geocryological region polygons from the 1:12,000,000 map. See the attribute description below）、geocryology.shp（digitized polygons of areas with detailed geocryological information from the 1:4,500,000 map. See the attribute description below）、icings.shp（point locations of icings）、

  per_frost_mound.shp（point locations of perennial frost mounds）、solifluction.shp（point locations of solifluction）、thermokarst.shp（point locations of thermokarst）。

  4、投影信息：PROJCS["albers_ea_conic_mongolia",

  GEOGCS["GCS_WGS_1984",

  DATUM["WGS_1984",

  SPHEROID["WGS_1984",6378137.0,298.257223563]],

  PRIMEM["Greenwich",0.0],

  UNIT["Degree",0.0174532925199433]],

  PROJECTION["Albers_Conic_Equal_Area"],

  PARAMETER["False_Easting",0.0],

  PARAMETER["False_Northing",0.0],

  PARAMETER["longitude_of_center",103.83333],

  PARAMETER["Standard_Parallel_1",43.341667],

  PARAMETER["Standard_Parallel_2",50.383333],

  PARAMETER["latitude_of_center",46.866667],

  UNIT["Meter",1.0]]