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。
Urban planners use GIS to model infrastructure.
市政规划人员使用GIS模拟基础设施。
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。
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。
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。
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。
Many developers and geographic information system (GIS) professionals have been unable to use a drawing Interchange format (DXF) or "drawing" (DWG) file.
很多开发人员和地理信息系统(GIS)专家一直无法使用drawingInterchangeFormat (DXF)或“ drawing ” (dwg)格式的文件。
When you talk about GIS data formats, you must consider the large number of formats to support to make each data viewer and GIS application widely usable.
在谈到GIS数据格式时，必然会考虑到要支持的大量格式，以使每个数据查看器和GIS应用程序可以广泛适用。
QGIS handles all three — raster, vector, and database — a state of affairs that took considerable effort for programmers writing GIS data programming libraries.
QGIS处理所有三种数据——栅格数据、矢量数据和数据库，这也是编写GIS数据编程库的程序员的重要努力方向。
When calculating distances for use in GIS applications, it is important to understand there are many different approaches, each with its own merits and demerits.
当计算用于GIS应用程序的距离时，一定要知道有许多不同的实现方法，并且每种方法都有其优缺点。
Tagged image file format (.tiff) is another commonly used raster-based image format, which GIS specialists adapted to geographers' needs and renamed GeoTIFF.
带标记的图像文件格式 (.tiff)是另一种常用的基于栅格的图像格式，GIS专家为适应地理学者的需要将其重命名为 GeoTIFF。
Tagged image file format (.tiff) is another commonly used raster-based image format, which GIS specialists adapted to geographers' needs and renamed GeoTIFF.
带标记的图像文件格式 (.tiff)是另一种常用的基于栅格的图像格式，GIS专家为适应地理学者的需要将其重命名为 GeoTIFF。
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