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 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。
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。
审核和验证GIS数据的正确性。
Experience with GIS data compilation or incremental update.
有GIS数据编译或者增量更新经验。
Traditional GIS data models can not reflect geographical continuity.
传统GIS数据模型反映不了地理世界的连续性。
Import and export vector and raster data, convert between different GIS data formats.
导入和导出矢量数据及栅格数据，实现多种GIS数据格式之间的转换。
It provides access to many types of GIS data, enables spatial querying of that data, and renders beautiful maps.
它可以访问多种格式的GIS数据，提供对这些数据的空间搜索，同时还可以绘制漂亮的地图。
The production of this paper is what is targeted initially: 3D GIS data model and data structure of water conservancy.
本文研究的主要成果是水利工程3DGIS数据模型与数据结构。
The GIS data organization and its main offline and online applications in power distribution automation are introduced.
介绍了GIS的数据组织及其在配电网自动化中的主要应用，包括离线和在线两方面。
However, CAD data and GIS data in the data models are very different; both the software described data in different ways.
但是，CAD数据和GIS数据在数据模型方面存在很大差异，两种软件描述数据的方式不同。
This is very important for the GIS data updating, particularly for those urban areas where ground features change rapidly.
这对于GIS数据更新尤其是对于特征变化很快的城市地区的数据更新十分重要。
Although the 2d representation and 2d visualization method of GIS data is mature, it is far from high-quality visualization.
GIS数据的二维表达和可视化手段已经比较成熟，但事实上距高质量显示还有很大的距离。
During the construction process of GIS projects, many users have the demand on the conversion between the CAD data and GIS data.
在GIS项目的建设过程中，很多用户都有将GIS数据与CAD数据相互转换的需求。
This paper discussed the method and technique of the auto-conversion of isomerous GIS data and integrated using in digital mine system.
探讨了在数字矿山系统中，实现异构数据自动转换和集成应用的技术和方法。
The software, MAPGIS, supports many kinds of GIS data format. Its public data format is comprehensive, clear and easy to be understood.
MAPGIS软件支持多种GIS数据交换，且其明码数据格式较全面、清晰，易于读写。
The standardization of GIS data management system and business process of production management of distribution network was expounded as well.
并对GIS数据管理体系、配网生产管理业务流程的规范作了相关阐述。
The topographic map scanning digitization is an important acquisition method for GIS data, which has become the mainstream of the map digitization.
地形图扫描数字化为GIS数据源的一种重要获取手段，已经成为地图数字化的主流。
In surveying and mapping, GIS data production and system development of 3d digital city, construction and other aspects, has a wealth of experience.
公司在测绘、GIS地理信息数据生产及系统开发、三维数字城市建设等方面，有着丰富的经验。
As it is impossible to unify the formats of the files provided by different GISs, the processing of GIS data is onerous when designing the GIS interface.
由于无法统一不同GIS提供的数据文件格式，在进行接口设计时对GIS数据的处理工作十分繁杂。
Data organization is one of primary differences between CAD and GIS. The paper mainly studies the classification and codes from planning CAD data to GIS data.
数据组织是CAD与GIS的主要区别之一，本文主要根据规划CAD数据和GIS数据的特点，研究规划CAD数据到GIS数据的分类和编码。
After analyzing the particularity of GIS data source, we give an approach and the principle of building data objects to fit for the requests of enterprise GIS.
在分析了地理信息系统(GIS)数据源特点的基础上，提出了构建符合企业级GIS要求的数据对象的原则和方法。
Spatial data is the main part of the GIS data system, constructing reasonable and efficient spatial indexing has an significant effect on the GIS system performance.
空间数据是GIS系统的主要数据组成部分，建立合理高效的空间数据索引对于GIS系统的性能有着极其显著的影响。
Basing on such GIS data model, we design a GIS electronic map system, which contains most basic GIS functions, such as object-create, map zoom, wandering, query and so on.
运用此模型，设计了一个基本的GIS电子地图实验系统，实现了GIS中地图对象的创建、地图的漫游、缩放、查询等功能。
Then based on the basic concepts and features of spatial data, we analyze the organization and storage of spatial data by using the object-oriented holistic GIS data model.
然后根据空间数据的基本概念和特征，利用面向对象的整体数据模型，分析了空间数据的组织方法和存储方式。
Then based on the basic concepts and features of spatial data, we analyze the organization and storage of spatial data by using the object-oriented holistic GIS data model.
然后根据空间数据的基本概念和特征，利用面向对象的整体数据模型，分析了空间数据的组织方法和存储方式。
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