[ 原始碼： gmt-dcw ]
套件：gmt-dcw（1.1.4-2）
Digital Chart of the World (DCW) for GMT
DCW-GMT is an enhancement to the original 1:1,000,000 scale vector basemap of the world available from the Princeton University Digital Map and Geospatial Information Center and from GeoCommunity at http://data.geocomm.com/readme/dcw/dcw.html. This data is for use by GMT, the Generic Mapping Tools.