共 12 条
- [1] [Anonymous], National Geodetic Survey's OPUS: Online Positioning User Service
- [2] [Anonymous], 2002, The Economist
- [3] [Anonymous], Dublin Core
- [4] BASSO M, 2002, GARTNER SEP
- [6] Dana PeterH., COORDINATE SYSTEMS O
- [7] SKICAL
- [8] ORACLE SPACIAL
- [9] 2002, GI NEWS E112
- [10] GML GEOGRAPHY MARK U