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。

These remain the mainstay of professional GIS.

这些保持了专业GIS的核心技术。

GIS software has an enormous application range.

GIS软件具有广泛的应用范围。

Urban planners use GIS to model infrastructure.

市政规划人员使用 GIS 模拟基础设施。

Several open source tools are handy for working with GIS data.

有几个开源工具可用于GIS数据。

GIS layer published on Geoplatform.gov/gulfresponse Website.

发表于Geoplatform.gov/gulfresponse网站地理信息系统层.

Life changes for the GIS specialist when vector-based data formats appear.

基于矢量的数据格式的出现改变了GIS专家的生活。

GIS systems acquire and process spatial data describing the Earth's surface.

GIS系统可获得并处理描述地球表面的空间数据。

Most of the important GIS software suites are available on Mac OS X, as well.

最重要的是，GIS软件套件还可以在Mac OS x上运行。

Cartographers depend on GIS software to aggregate data to produce data-rich maps.

制图人员依靠GIS软件集成数据，从而制作数据丰富的地图。

GIS data stored within a PostgreSQL database are fully searchable using SQL-92.

存储在PostgreSQL数据库中的GIS数据完全可以使用SQL - 92搜索。

Applications store GIS data using two distinct data structures: raster data and vector data.

应用程序使用两种不同的数据结构存储GIS数据：栅格数据和矢量数据。

Public domain GIS data cannot exist without some fairly sophisticated data-storage mechanism.

在没有相当完善的数据存储机制的情况下，公共领域 GIS 数据不可能存在。

There are civilians who would probably want to head for the exit when GIs started packing.

在大兵们打包之前还有平民想要先行撤离。

Environmental scientists need GIS software to model erosion in coastal areas and mountain valleys.

环境科学家需要GIS软件来模拟沿海区域和山谷的侵蚀。

But it isn't all that useful in a GIS system, because we have no clue where the woods or the river are.

但这些信息在GIS系统中就没有多大用处，因为我们不知道小河和森林的位置。

GIS users can deploy QGIS as a stand-alone GIS data viewer and editor or as part of a GIS tool chain.

GIS用户可以将QG IS部署为单独的GIS数据查看器和编辑器，或者部署为GIS工具链的一部分。

This medical ward has twenty-one sick and injured GIs, and one recently captured, young-looking Cambodian.

有21位伤病员住在这座医疗站里，还有1位最近被俘的柬埔寨人，他看起来很年轻。

The large number of imaging and mapping modules make it a lot easier for GIS specialists to analyze data in new ways.

大量的成像和成图模块大大方便了 GIS 专家以新的方法分析数据。

Today, programmers can access a whole continuum of open source GIS applications, largely developed on UNIX and Linux systems.

目前，编程人员能够访问整个开源 GIS 应用程序在很大程度上依赖于 UNIX 和 Linux 系统。

This prepares the database for use by a GIS and for spatial business logic implemented in SQL, including distance-based queries.

这使数据库准备好供 GIS 使用并支持 SQL 中实现的空间业务逻辑，包括基于距离的查询。

Geographic information systems (GIS) and online mapping applications continue to become more powerful and easier to use every year.

地理信息系统(GIS, Geographic Information System)与在线地图应用服务每年都在变得更强大和易于使用。

Visit local city offices to inquire about geographic information science (GIS) data, and you'll usually leave with more data than you need.

向本市办事处询问关于地理信息系统(GIS)的数据，通常您会得到比您所需还多的数据。

Understanding and using GIS concepts and data in your software can, when implemented in the right place, make it much more useful for your users.

理解并在您的软件中使用GIS概念和数据，并且在合适的地方实现它，对您的用户非常有用。

When the analytical insights and data quality of GIS are combined with the geoweb'svisualisation and networking prowess, startling efficiencies emerge.

当GIS的分析能力和数据质量整合进geoweb的可视功能和超凡网络后，令人吃惊的功能显现出来。

Recently, geographical information system (GIS) is the combination of savior and operation and information regarding distribution of geographical space.

近年来，地理信息系统（GIS）是储存和处理与地理空间分布有关信息的集合。

A GIS specialist can add data, like precipitation values or economic data, to each cell, but describing complex irregular geographic shapes is difficult.

GIS专家可以向每个网格中添加数据，如降水量值或经济数据，但描述复杂的不规则地理形状较为困难。