共查询到20条相似文献，搜索用时 109 毫秒
1.
华一新 《测绘科学技术学报》2000,17(1):46-48
边界信息系统是一种用于边界管理的、具有通用性质的专用地理信息系统,是从底层用VisualC++语言实现的。文中从需求分析、结构设计、静态模型建立、动态模型建立等方面,使用支持标准建模语言UML的CASE工具Rose对边界信息系统的设计进行了说明,为我国地理信息系统建立的工程化设计和管理提供了一种思路。 相似文献
2.
本文介绍了第一个可用于在非常大范围的比例尺下操作单个数据集的地理信息系统。这种多比例尺ＧＩＳ的设计完全集成在开放的数据库管理系统Ｐｏｓｔｇｒｅｓ和开放的地理信息系统ＧＥＯ＾＋＋之中。除系统设计之外，本文将给了Ｐｏｓｔｇｒｅｓ数据库系统环境下三种综合工具的详细实现过程：１．用于简化线和面的ＢＬＧ树，２．按重要级和位置进行选择的Ｒｅａｃｔｉｖｅ树，３．解决前两种结构分割区域产生的一些问题的ＧＡＰ树。 相似文献
3.
第三讲ＧＩＳ及其现状分析宋其友自从１９６３年加拿大测量学家Ｒ·Ｆ·Ｔｏｍｌｉｎｓｏｎ首先提出地理信息系统概念并建立世界上第一个ＧＩＳ—加拿大地理信息系统（ＣＧＩＳ）以来，经过３０多年的发展和进步，已经得到了广泛的应用，并为世界各国所关注。我国起步较晚... 相似文献
4.
描述了一个基于离散事件系统（ＤＥＶＳ）形式理论和面向对象方法学的 ＤＥＶＳ系统建模仿真框架ＳｉｍｕＣｌａｓｓ,它不但在 ＶｉｓｕａｌＣ＋＋环境下实现了 ＤＥＶＳ形式理论及其相关的层次仿真算法,而且结合了两种强大的系统开发框架：ＤＥＶＳ形式理论和面向对象范形,ＳｉｍｕＣｌａｓｓ支持在Ｃ＋＋面向对象环境中运用层次模块化方法进行离散事件模型的开发。 相似文献
5.
描述了一个基于离散事件系统（ＤＥＶＳ）形式理论和面向对象方法学的ＤＥＶＳ系统建模仿真框架ＳｉｍｕＣｌａｓｓ,它不但在ＶｉｓｕａｌＣ＾＋＋环境下实现了ＤＥＶＳ形式理论及其相关的层次仿真算法,而且结合了两种强大的系统开发框架：ＤＥＶＳ形式理论和面向对象范形,ＳｉｍｕＣｌａｓｓ支持在Ｃ＾＋＋面向对象环境中运用层次模块化方法进行离散事件模型的开发。 相似文献
6.
中国大陆岩石GPS平台Geo TransGIS的设计与实现 总被引：2，自引：0，他引：2
在中国大陆岩石圈地理信息系统研究过程中，提出了一种工具型二维地理信息系统和二三维地理信息系统地功能模块的设计思路，探讨了了面向对象方法，面向对象数据模型，面向对象数据库、无缝集成、开放式数据库互联技术在理信息系统研制中的运用；并用实例证明了此设计方法的可行性和实用性。 相似文献
7.
8.
本文以ＡＲＣ／ＩＮＦＯ地理信息系统软件为平台,就建立城市管网信息系统过程中,空间数据质量的控制（检查）内容,控制方法进行了讨论,并给出了管网信息系统中属性及其逻辑一致性等误差控制的软件实现。 相似文献
9.
本文介绍基于Maplnfo的中小型地籍管理信息系统的设计思路和实现方案，同时也阐明了地理信息系统的基本功能和开发技术。 相似文献
10.
基于ArcView的多媒体电子地图的制作 总被引：8，自引：0，他引：8
介绍了利用ＡｒｃＶｉｅｗ和ＶｉｓｕａｌＣ＾＋＋设计多媒体地图的思路和过程,特别对查询的设计和多媒体查询的设计和实现作了详细介绍,并且给出了部分程序代码。 相似文献
11.
采用Landsat TM数据分析了阿克苏河—塔里木河断面水质污染状况,通过波段的DN值和常规监测数据建立能反映水质状况的
污染物监测模型。结果发现,将2000年常规监测数据代入模型后,与遥感数据的结果基本吻合| 重建阿克苏河—塔里木河的连续水体
污染变化曲线,得出污染物浓度随着远离上游而增加。 相似文献
12.
13.
Monitoring drought dynamics in the Aravalli region (India) using different indices based on ground and remote sensing data 总被引：5，自引：0，他引：5
C. Bhuiyan R.P. Singh F.N. Kogan 《International Journal of Applied Earth Observation and Geoinformation》2006,8(4):289-302
The hard-rock hilly Aravalli terrain of Rajasthan province of India suffers with frequent drought due to poor and delayed monsoon, abnormally high summer-temperature and insufficient water resources. In the present study, detailed analysis of meteorological and hydrological data of the Aravalli region has been carried out for the years 1984–2003. Standardised Precipitation Index (SPI) has been used to quantify the precipitation deficit. Standardised Water-Level Index (SWI) has been developed to assess ground-water recharge-deficit. Vegetative drought indices like Vegetation Condition Index (VCI) and Temperature Condition Index (TCI) and Vegetation Health Index (VHI) have been computed using NDVI values obtained from Global Vegetation Index (GVI) and thermal channel data of NOAA AVHRR satellite. Detailed analyses of spatial and temporal drought dynamics during monsoon and non-monsoon seasons have been carried out through drought index maps generated in Geographic Information Systems (GIS) environment. Analysis and interpretation of these maps reveal that negative SPI anomalies not always correspond to drought. In the Aravalli region, aquifer-stress shifts its position time to time, and in certain pockets it is more frequent. In comparison to hydrological stress, vegetative stress in the Aravalli region is found to be slower to begin but quicker to withdraw. 相似文献
14.
15.
Piyoosh Rautela Ramesh Chandra Lakhera 《International Journal of Applied Earth Observation and Geoinformation》2000,2(3-4)
The area around Sataun in the Sirmur district of Himachal Pradesh, India (falling between the rivers Giri and Tons; both tributaries of the Yamuna River) was studied for landslide vulnerability on behalf of the inhabitants. The study was made using extensive remote sensing data (satellite and airborne). It is well supported by field evidence, demographic and infrastructural details and aided by Geographic Information System (GIS) based techniques. Field observations testify that slope, aspect, geology, tectonic planes, drainage, and land use all influence landslides in the region. These parameters were taken into consideration using the statistical approach of landslide hazard zonation. Using the census data of 1991, vulnerability of the populace to the landslide hazard was accessed. As most of the infrastructure in the region is concentrated around population centres, population data alone was used for vulnerability studies. 相似文献
16.
ZHAN F. Benjamin 《地球空间信息科学学报》2011,(1)
Although it is well known that coseismic gravity changes take place during an earthquake, previous research has not yielded convincing evidence demonstrating that significant gravity changes occur before large earthquakes. Furthermore, even if we suspect that gravity changes occur before large earthquakes, we have yet to demonstrate how to consistently observe these changes for useful earthquake forecast that would bring benefits to society. We analyzed ground gravity survey data obtained in 1998, 2000, 200... 相似文献
17.
GNSS系统及其技术的发展研究 总被引：3，自引：1，他引：2
阐述了国际上卫星导航系统的总体发展,对美、俄、欧、中的四大全球系统,以及相关的区域系统和增强系统进行了简单的介绍,研究分析了GNSS系统及其技术的发展趋势,同时分析了我国Compass全球系统面临的机遇和挑战,并提出了我国未来工作的建议. 相似文献
18.
自动车辆定位导航系统中传感器的误差分析 总被引：1，自引：0，他引：1
对国界定位导航系统中几种常见的辅助传感器所产生的误差进行了分析，导出了不同传感器的误差模型。这些误差模型是估计车辆位置的扩展卡尔曼滤波器的基础，同时也为选择适当的传感器提供了理论根据。 相似文献
19.
“4D”技术及其应用 总被引：13，自引：0，他引：13
介绍“４Ｄ”（即数字地面模型、数字正射影像、数字栅格地图和数字线划地图）系列产品的生产流程、关键技术、及其在耕地保护、防灾减灾救灾和城市规划等方面的应用方法。 相似文献
20.
《International Journal of Digital Earth》2013,6(1):66-87
Abstract Virtual Australia is not a well-defined or agreed concept. This discussion paper conceptualises Virtual Australia as a ‘virtual [digital] model containing and representing all non-trivial objects and their contextual environment – from blue sky to bedrock – in real world Australia’. It describes a scenario for Virtual Australia, one or two decades from now, in which the locations and conditions of non-trivial objects and their environment are updated automatically through a combination of remote sensing and wireless communication technologies in support of a ‘Supranet’. It then examines the concept of the ‘Supranet’ – a pervasive information network based largely on wireless technology linking the physical world to a virtual model in real time – and develops and discusses three principal characteristics of the Supranet: the ability to have or collect specific information (know); the ability to process information (think); and the ability to communicate that information. If, in the near future, any or all non-trivial devices are to some extent able to know, think and communicate, the potential for object autonomy will be realised. 相似文献