1. By means of GIS method, the digital elevation model(DEM)is established, the subcatchment boundaries are studied. 利用 GIS 方法建立了数字高程模型(DEM),研究了子汇水面积的边界。
2. These remain the mainstay of professional GIS. 这些保持了专业GIS的核心技术。
3. GIS software has an enormous application range. GIS软件具有广泛的应用范围。
4. Urban planners use GIS to model infrastructure. 市政规划人员使用 GIS 模拟基础设施。
5. Several open source tools are handy for working with GIS data. 有几个开源工具可用于GIS数据。