查询词典 gis

Based on GIS, we have developed the regional forecasting technology. The daily temperature, degree-day and required degree-days of special phenology event can be displayed and expressed in real time.

基于GIS系统建立了区域化预测技术，利用GIS系统可以实时地显示和表达每天温度的变化、日度累积及其离特定物候事件所需要的日度值，实现对棉铃虫的预测。

Application of GIS is vital to increasing the efficiency of modern logistics distribution due to its important function.

文中研究了GIS在现代物流配送中的作用，指出应用GIS对于提高现代物流配送效率是至关重要的。

For the studies of GIS uncertainty, error band model of a line segment is one of the current focus issues, which reason is not only that there are many open questions for the uncertainty of line segment but also that the uncertainty of line segment is the base of both the uncertainty of the surface element and GIS spatial analysis.

对GIS不确定性的研究来说，线元不确定性的研究是一个重点，因为线元不仅是面域不确定性的基础，其本身也是GIG叠置分析、缓冲区分析和空间地址配对分析等的基本元素。

By the integration of GIS and the data obtained from forest resource inventory in 1987 and 2000, the analysis of spatial pattern of forest resource in Jinsong forest farm in Baihe forest bureau was carried out and the maps of management based on current resource status were produced.

利用1987年和2000年两期森林资源二类调查数据、林学图、地形图和GIS技术相结合，对长白山区白河林业局劲松林场的资源空间格局变化进行分析，并在现有资源状况下，根据森林采伐规程，通过GIS技术对林场进行经营利用规划，生成经营利用主题图。

Rule-based and reusebased method is adapted in our system to develop applications. Rules are used to define geometric representation of geographic objects, spatial relationships among geographic objects and map design rules. Reusability is realized through object's inheritance and encapsulation. The basic function related to GIS has been implemented in OOGDB's basic class base. Application related function can be implemented in sub-classes of basic classes and some of basic class' function can even be overloaded.

GIS应用系统的开发采用基于规则和基于重用的方法进行，规则用于定义地理对象的几何表示和空间关系以及地图构造的规则等，重用是通过面向对象的继承和封装机制实现的，GIS实现了一个基本的类库，它完成基本的空间处理和操作，用户通过定义这些类的子类重用类库提供的功能，并增加与应用系统有关的特殊功能，用户甚至可以通过重载修改某些类库的功能。

This paper summaries the technical r oute of farmland grading supported b y GIS and explains in detail some key s teps like the creation of farmland graphic library and mathematical model,the gradin g of evaluating element,and output o f final graphs.

如何利用GIS技术开展农用地分等定级工作，本文概述了地理信息系统支持下的农用地分等定级的技术路线，GIS环境下图形库的建立、评价单元的划分、数学模型的建立，成果图的输出等几项关键步骤。

Through the comparative analysis of irrigation management information systems based on relation database technologies and GIS technologies, we found that the latter has the merits such as integration of graphic data and attribution data, visualization of data and display of further characters using attribution data. The traditional relation-based database, which is good at storing and managing attribution data, is not able to describe and manage those data.

1通过对基于关系型数据库技术支持的灌区管理信息系统与基于GIS技术支持的灌区管理信息系统的比较与分析发现：基于GIS技术支持的灌区管理信息系统具有图形数据属性数据一体化、不仅可以用图形把数据直观地表现，还可以用属性数据表述其更加详尽的特征等优点，而传统的以存储、管理属性数据见长的关系型数据库用来描述和管理这些数据难免感到力不从心。

For customer s requirements oriented designing, traditional GIS software meet more and more irresolvable problems, can neither completely meet the demands of applications, nor keep pace with the mainstream of software technologies, and all of these make it affront much more challenge.

但传统的GIS在需要按照客户的要求定制时，面临越来越多不能解决的难题，不能完全满足GIS应用的需求，也不符合软件技术发展的潮流，在许多方面面临严峻的挑战。

As an important part of GIS platform, spatial reference system includes coordinate transformation and map projection, also named as Map projection transformation system.

GIS中的空间参照系统是GIS平台中的重要组成部分，内容包括各种坐标系统的转换和地图投影，故也称为投影变换系统。

The development of MetroGIS in America is of great significance to the building of Yangtze River Delta Megalopolis GIS.

美国城市群GIS的相关实践——MetroGIS对长三角城市群GIS的建设具有重要的借鉴意义。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。