The data is digitized from the current land use map of Zhangye. This map is one of the key scientific and technological projects of the Seventh Five Year Plan of the state: "Three North" remote sensing comprehensive survey of shelterbelts, one of the series of maps of Ganqingning type area. The information is as follows:

• Editor in chief: Wang Yimou

• Deputy editor in chief: Feng Yusun, you Xianxiang, Shen Yuancun

• Editorial board members: Wang Xian, Wang Jingquan, Qiu Mingxin, Quan Zhijie, Mou Xindai, Qu Chunning, Yao Fafen, Qian Tianjiu, Huang Zhizi, Mei Chengrui, Han Xichun, Li Yujiu, Hu Shuangxi

• Editor in charge: Huang Meihua

• Edited by: Mou Xinshi, Cui Saihua, Wang Xian. He Shouhua

• Compiled by: he Shouhua, Wang Xian, Quan Zhijie, Cui Saihua, long Yaping, Mou Xinshi, he Shouhua, Mao Xiaoli, Cui Saihua, Wang Changhan

• Editors: Feng Yusun, Wang Yimou

• Qinghua: Feng Yusun, Zhang Jingqiu, Yang Ping

• Drawn by: Feng Yusun, Yao Fafen, Wang Jianhua, Zhao Yanhua, Li Weimin

• Cartographer: prepared by Desert Research Office of Chinese Academy of Sciences

• Publishing House: Xi'an Map Publishing House

• Scale: 1:500000

• Publication time: no

2. File format and naming

Data is stored in ESRI ShapeFile format, including the following layers:

Zhangye land use map (landuse), river, road

3. Data fields and properties

Type number type type desert

11 paddy

12 irrigated field

13 non irrigated field

131 plain non irrigated field

Valley non irrigated field

133 slope non irrigated field

134 terrace non irrigated fields

Please refer to the data document for details

2. Projection information:

Angular Unit: Degree (0.017453292519943295)

Prime Meridian: Greenwich (0.000000000000000000)

Datum: D_Beijing_1954

Spheroid: Krasovsky_1940

Semimajor Axis: 6378245.000000000000000000

Semiminor Axis: 6356863.018773047300000000

Inverse Flattening: 298.300000000000010000