A map of the TZ timezones of China

The tz_ch shapefile (849KB) captures the boundaries of the TZ timezones of China.

All the names and geometries derived from the China Administrative Regions GIS Data: 1:1M, County Level, 1990 data of the China Dimensions data collection. The assignment of TZ timezones is based on the description of the zones in tz2008e, as well as messages exchanged on the tz mailing list in June-July 2006 (and in particular, the map sent by Jesper Nørgaard Welen on July 14).

Snapshot of the zones

This is a snaphsot of the zones, with province boundaries in blue:

Logical description of the zones

This is a concise description of the zones, using the counties as they existed on December 30, 1990. The names are those in the China Dimensions data.

Asia/Kashgar:

• west part of Xinjiang, limited by and including: Bole, Yining, Nileke, Gongliu, Tekesi, Baicheng, Xinhe, Akesu, Cele, Yutian
• west part of Xizang, limited by and including: Ritu, Geji, Pulan

Asia/Urumqi:

• east part of Xinjiang, limited by and including: Tuoli, Jinghe, Wuso, Hejing, Xinyuan, Kuche, Shaya, Minfeng
• east part of Xizang, limited by and including: Gaize, Longge`er, Zhongba
• west part of Gansu: Subei Mengguzu, Anxi, Dunhuang, Akesai
• west part of Quinghai, limited by and including: Tianjun, Wulan, Dulan, Maduo, Chenduo, Yushu
• west part of Guangdong, limited by and including: Xinyi, Gaozhou, Dianbai

Asia/Chongqing:

• west part of Neimenggu, limited by and including: Siziwang, Chaha`er-Youyihou, Shangdu, Huade, Xinghe
• east part of Gansu, limited by and including: Yumen, Su'nan Yuguzu
• east part of Quinghai, limited by and including: Qilian, Gangcha, Gonghe, Xinghai, Maqin, Dari
• central part of Guangdong: Deqing, Yu`nan, Luoding, Yunfu, Xinxing, Yangchun, Kaiping, Enping, Yangjiang, Taishan, Yangxi
• Ningxiahuizu, Shaanxi, Sichuan, Yunnan, Guizhou, Guangxizhuangzu, Hainan

Asia/Harbin:

• Heilongjiang, less Mohe
• Jilin

Asia/Shanghai:

• east part of Neimenggu, limited by and including: Sunite-You, Xianghuang
• Guandong: east part, limited by and including: Fengkai, Huaiji, Guangning, Gaoyao, Heshan, Xinhui, Doumen, Zhuhai
• Mohe county of Heilongjiang
• Hebei, Liaoning, Beihing, Shanxi, Hebei, Tianjin, Henan, Shandong, Anhui, Jiangsu, Hunan

Extensive description of the zones

The cd2tz CVS file lists all the counties, with their name, code, province name, and TZ id.

Construction of the shapefile

The starting map is the tbd90 layer of the China Dimensions data collection, available here.

The source data was converted to shapefile format using the ESRI import71 utility, and reprojected to latitude/longitude using ogr2ogr for the NAD83 datum. The resulting shapefile (as well as the similar converion of the pbd90 layer) is available here (9.64MB).

The remaining steps are simply to join the tbd90 layer and the cd2tz layer, and to dissolve the result on the tzid attribute.

The script tz_ch.sh performs all those operations.

Contact - Thanks

History:

• September 16, 2008: fix the name of the Harbin zone in data (was incorrectly Arbin)
• September 13, 2008: first version