portal.metadata
元数据

数据缩略图


数据质量描述

数据集通过严格的人工审核控制质量


数据集摘要

数据集包括:

1、permaice(冻土类型图)

2、subsea(海底界线矢量图)

3、treeline(林线矢量图)

4、nhipa(栅格图)

5、llipa(栅格图)

Permaice包括属性字段:

Num_code(冻土属性编码)

Combo(冻土属性)

extent(冻土范围)

content(含冰量)

属性对照如下:

(1)冻土属性对照表:

0 (No information )

1 - chf (Continuous permafrost extent with high ground ice content and thick overburden)

2 - dhf (Discontinuous permafrost extent with high ground ice content and thick overburden )

3 - shf (Sporadic permafrost extent with high ground ice content and thick overburden )

4 - ihf (Isolated patches of permafrost extent with high ground ice content and thick overburden )

5 - cmf (Continuous permafrost extent with medium ground ice content and thick overburden )

6 - dmf (Discontinuous permafrost extent with medium ground ice content and thick overburden )

7 - smf (Sporadic permafrost extent with medium ground ice content and thick overburden )

8 - imf (Isolated patches of permafrost extent with medium ground ice content and thick overburden)

9 - clf (Continuous permafrost extent with low ground ice content and thick overburden )

10 - dlf (Discontinuous permafrost extent with low ground ice content and thick overburden )

11 - slf (Sporadic permafrost extent with low ground ice content and thick overburden )

12 - ilf (Isolated patches of permafrost extent with low ground ice content and thick overburden)

13 - chr (Continuous permafrost extent with high ground ice content and thin overburden and exposed bedrock )

14 - dhr (Discontinuous permafrost extent with high ground ice content and thin overburden and exposed bedrock )

15 - shr (Sporadic permafrost extent with high ground ice content and thin overburden and exposed bedrock )

16 - ihr (Isolated patches of permafrost extent with high ground ice content and thin overburden and exposed bedrock)

17 - clr (Continuous permafrost extent with low ground ice content and thin overburden and exposed bedrock )

18 - dlr (Discontinuous permafrost extent with low ground ice content and thin overburden and exposed bedrock )

19 - slr (Sporadic permafrost extent with low ground ice content and thin overburden and exposed bedrock)

20 - ilr (Isolated patches of permafrost extent with low ground ice content and thin overburden and exposed bedrock )

21 - g (Glaciers)

22 - r (Relict permafrost)

23 - l (Inland lakes )

24 - o (Ocean/inland seas )

25 - ld (Land)

(2)冻土范围对照表

c = continuous (90-100%)

d = discontinuous (50- 90%)

s = sporadic (10- 50%)

i = isolated patches ( 0 - 10%)

(3)含冰量对照表

h = high (>20% for "f" landform codes) (>10% for "r" landform codes)

m = medium (10-20%)

l = low (0-10%)


Projection of the shapefiles is:

PROJCS["Sphere_ARC_INFO_Lambert_Azimuthal_Equal_Area",

GEOGCS["GCS_Sphere_ARC_INFO",

DATUM["Sphere_ARC_INFO", SPHEROID["Sphere_ARC_INFO",6370997.0,0.0]],

PRIMEM["Greenwich",0.0],

UNIT["Degree",0.0174532925199433]],

PROJECTION["Lambert_Azimuthal_Equal_Area"],

PARAMETER["False_Easting",0.0],

PARAMETER["False_Northing",0.0],

PARAMETER["longitude_of_center",180.0],

PARAMETER["latitude_of_center",90.0],

UNIT["Meter",1.0]]

Projection for the raster (*.byte) files is:

Projection: Lambert Azimuthal

Units: meters

Spheroid: defined

Major Axis: 6371228.00000

Minor Axis: 6371228.000

Parameters:

radius of the sphere of reference: 6371228.00000

longitude of center of projection: 0

latitude of center of projection: 90

false easting (meters): 0.00000

false northing (meters): 0.00000


数据引用
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Brown, J., O.J. Ferrians, Jr., J.A. Heginbottom, and E.S. Melnikov. 1998, revised February 2001. Circum-arctic map of permafrost and ground ice conditions. Boulder, CO: National Snow and Ice Data Center. Digital media.

数据列表
# 标题 格式 文件大小
1 环北极地区多年冻土和地下冰状态图(V2)-文档 rar 939.0 kB
2 1000万环北极地区冻土图 rar 205.1 MB


loading
E: -180.0
W:180.0
S: 25.0
N: 90.0

数据服务信息

联系人:
寒区旱区科学数据中心数据服务组
服务电话:
0931-4967287
服务邮箱:
westdc@lzb.ac.cn

联系信息

数据贡献者:
吴立宗
元数据作者:
吴立宗
数据管理者:
李红星