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This dataset is the first 1: 100,000 desert spatial database in China based on the graphic data of desert thematic maps. It mainly reflects the geographical distribution, area size, and mobility of sand dunes in China. According to the system design requirements and relevant standards, the input data is standardized and uniformly converted into a standard format for various types of data input. Build a library to run the delivery system.

This project uses the TM image in 2000 as the information source, and interprets, extracts, and edits the coverage of the national land use map and TM digital image information in 2000. It uses remote sensing and geographic information system technology to 1: 100,000 Thematic mapping requirements for scale bar maps were made on the desert, sandy land and gravel Gobi in China. The 1: 100,000 desert map across the country can save users a lot of data entry and editing work when they are engaged in research on resources and the environment. Digital maps can be easily converted into layout maps

The dataset properties are as follows:

Divided into two folders e00 and shp:

Desert map name and province comparison table in each folder

01 Ahsm Anhui

02 Bjsm Beijing

03 Fjsm Fujian

04 Gdsm Guangdong

05 Gssm Gansu

06 Gxsm Guangxi Zhuang Autonomous Region

07 Gzsm Guizhou

08 Hebsm Hebei

09 Hensm Henan

10 Hljsm Heilongjiang

11 Hndsm Hainan

12 Hubsm Hubei

13 Jlsm Jilin Province

14 Jssm Jiangsu

15 Jxsm Jiangxi

16 Lnsm Liaoning

17 Nmsm Inner Mongolia Gu Autonomous Region

18 Nxsm Ningxia Hui Autonomous Region

19 Qhsm Qinghai

20 Scsm Sichuan

21 Sdsm Shandong

22 Sxsm Shaanxi Province

23 Tjsm Tianjin

24 Twsm Taiwan Province

25 Xjsm Xinjiang Uygur Autonomous Region

26 Xzsm Tibet Autonomous Region

27 Zjsm Zhejiang

28 Shxsm Shanxi

1. Data projection:

               Projection: Albers

               False_Easting: 0.000000

               False_Northing: 0.000000

               Central_Meridian: 105.000000

               Standard_Parallel_1: 25.000000

               Standard_Parallel_2: 47.000000

               Latitude_Of_Origin: 0.000000

               Linear Unit: Meter (1.000000)

2. Data attribute table: area (area)

                  perimeter

                  ashm_ (sequence code)

                  class (desert encoding)

                  ashm_id (desert encoding)

3. Desert coding: mobile sandy land 2341010

                  Semi-mobile sandy land

                  Semi-fixed sandy land 2341030

                  Gobi 2342000

                  Saline land 2343000

4: File format: National, sub-provincial and county-level desert map data types are vector shapefiles and E00

5: File naming: Data organization based on the National Basic Resources and Environmental Remote Sensing Dynamic Information Service System is performed on the file management layer of Windows NT. The file and directory names are compound names of English characters and numbers. Pinyin + SM composition, such as the desert map of Gansu Province is GSSM. The flag and county desert map is the pinyin + xxxx of the province name, and xxxx is the last four digits of the flag and county code. The division of provinces, districts, flags and counties is based on the administrative division data files in the national basic resources and environmental remote sensing dynamic information service operation system.