龚健雅
个性化签名
- 姓名:龚健雅
- 目前身份:
- 担任导师情况:
- 学位:
-
学术头衔:
博士生导师
- 职称:-
-
学科领域:
地图制图技术
- 研究兴趣:
暂无
-
主页访问
3658
-
关注数
0
-
成果阅读
786
-
成果数
10
【期刊论文】Three-dimensional modeling and application in geological exploration engineering
龚健雅, Jianya Gong a, Penggen Cheng a, b, Yandong Wang a
,-0001,():
-1年11月30日
Taking geological exploration engineering as the topic of our research, we presented a hybrid data model integrating vector and raster data, and proposed a sub-model; i.e., a QTPV (Quasi Tri-Prism Volume) model. Based on QTPV, the concept model, logical model and data structure were designed in detail. Modeling, model cutting and partition algorithms on QTPV are proposed. The modeling features of QTPV have been discussed. The QTPV model is more efficient than 3D FDS and TEN in terms of partition, storage volume, modeling ability, and application in Geological Exploration Engineering (GEE). A 3DgeoMV system prototype has been developed based on the proposed QTPV model. A case study has been conducted by using the real borehole sample data from a GEE area in China's Inner Mongolia China. The application shows that the QTPV has the ability to model real 3D in GEE.
Quasi Tri-Prism Volume Model,, Data structure,, Modeling,, Cutting,, Partition,, Algorithm,, Geological exploration engineering
-
50浏览
-
0点赞
-
0收藏
-
0分享
-
440下载
-
0评论
-
引用
【期刊论文】Federated Spatial Databases ant Interoperability
龚健雅, Jianya Gong, Yandong Wang
,-0001,():
-1年11月30日
It is a period of explosibility information. Especially for spatial information science, information can be acquired through many routes, such as man-made planet, aeroplane, laser, digital photogrammetry and so on. Spatial data sources are usually distributed and heterogeneous. In order to share and interoperate spatial data, federated database is the best resolution. In this paper, the concepts of federated database and interoperability are introduced. Three heterogeneous kinds of spatial data, vector, image and DEM are used to create integrated database. A data model of federated spatial databases is given.
Federated,, Spatial Databases,, Interoperability
-
62浏览
-
0点赞
-
0收藏
-
0分享
-
223下载
-
0评论
-
引用
【期刊论文】Object-Oriented and Integrated Spatial Data Model for Managing Image, Dem and Vector Data
龚健雅, Jianya Gong, Deren LI
,-0001,():
-1年11月30日
The new generation of GIS demands the integrated management of vector, image and DEM data. This paper brings forward a vector, image and DEM integrated spatial data model on the basis of the object-oriented idea. It also discusses the implementation method of this integrated spatial database management system. The spatial database management system has been used in the construction of China Spatial Data Infrastructure as the base of a GIS software, GeoStar. It reveals that the system has high efficiency and feasibility to manage national, provincial and city spatial data of multi-scales and multi-sources.
-
79浏览
-
0点赞
-
0收藏
-
0分享
-
233下载
-
0评论
-
引用
【期刊论文】Effects of Various Factors on the Accuracy of DEMs: An Intensive Experimental Investigation
龚健雅, Jianya GONG, , Zhilin LI, Qing ZHU, Haigang SHU, Yi ZHOU
,-0001,():
-1年11月30日
This paper describes a series of tests on the accuracy of DEMs. The effects of 4 factors on DEM accuracy have been tested, i.e. the accuracy, density of source data, the characteristics of terrain surface and the modelling approaches. A large area covered by two 1:10,000 maps were selected for testing. The terrain types range from flat, hilly to mountainous. Various sources (photographs and contour maps) are used and measurement methods employed. From test results, the followings have been found: (a) Source data measured manually from analytical plotters is most reliable as automated measurement using image matching could generate systematic errors; (b) The accuracy of DEMs decreases (or RMSE becomes larger) with an increase in sampling interval and the relationship is linear; (c) The inclusion of feature points and lines improves the accuracy of DEMs significantly, especially when the terrain is rough; (d) Generally speaking, the accuracy of DEMs decreases with an increase in relief, however, it is not always the case and the best results may be obtained in hilly areas; (e) The direct modelling from originally measured data to form triangular network will yield better results than the indirect modelling via a random-to-grid interpolation to form grid network. The difference could be significant if the terrain is rough. From these conclusions, some advice on DEM production could be made as follows: (a) When using automated photogrammetric system for data acquisition, editing by experienced operators should be considered; (b) In hilly areas, photogrammetric contouring can be most efficient methods for DEM data acquisition if analytical plotters are used; (c) Feature points should always be measured and kept in order to reduce the data volume while retaining the fidelity of the DEM; and (d) When terrain surface is rough, triangulation-based methods are recommended.
-
75浏览
-
0点赞
-
0收藏
-
0分享
-
225下载
-
0评论
-
引用
龚健雅, 王艳东, 王密, 熊汉江, 王永君
武汉大学学报(工学版),2001,34(6):52~59,-0001,():
-1年11月30日
数字地球作为一个战略目标在我国已被广泛接受,与此相关的数字中国、数字省、数字城市等工程正在全国如火如荼地展开。什么样的系统适应于构造数字地球、数字中国、数字省、数字城市的基础平台呢?从数字地球的基本构成、特点和当前技术的发展状况来分析和介绍适应于构建数字地球的新一代GIS软件的设计与实现。
数字地球, 面向对象, 集成化空间数据库, GIS
-
73浏览
-
0点赞
-
0收藏
-
0分享
-
464下载
-
0评论
-
引用
龚健雅, 朱欣焰, 朱庆, 熊汉江
武汉测绘科技大学学报,2000,25(4):289~293,-0001,():
-1年11月30日
新一代地理信息系统要求矢量、影像和DEM数据集成化管理。本文提出了一种基于面向对象思想的矢量、影像和DEM三库集成的空间数据模型,讨论了集成化空间数据库管理系统的实现方式。该空间数据库管理系统已作为GIS软件GeoStar的核心,被用于中国的空间数据基础设施建设,管理国家级、省级和市级的多数据源、多比例尺的空间数据,被认为是一种高效可行的方案。
面向对象, 集成化空间数据库, GIS, 空间数据基础设施
-
79浏览
-
0点赞
-
0收藏
-
0分享
-
326下载
-
0评论
-
引用
龚健雅, 袁相儒, 陈莉丽, 韩海洋
武汉测绘科技大学学报,1998,23(4):364~369,-0001,():
-1年11月30日
讨论了基于互联网的地理信息组织与处理,提出一种分布式的跨平台的地理信息组织与处理方法,并讨论了它的软件实现。最后介绍根据这个思想设计的基于互联网的地理信息系统软件原型,以实例说明这种方法的可行性和优越性。
地理信息系统, 分布式, 互联网
-
99浏览
-
0点赞
-
0收藏
-
0分享
-
138下载
-
0评论
-
引用
龚健雅, 夏宗国
武汉测绘科技大学学报,1997,22(1):7~15,-0001,():
-1年11月30日
以矿山地质为背景,深入分析三维空间信息系统所涉及到的空间对象以及它们之间的联系,提出了几种新的空间对象类型。探讨用矢量与栅格混合的数据结构,以及面向对象的数据模型来表达各类三维空间对象,以此作为设计和建立三维地理信息系统的基础。
三维地理信息系统, 面向对象, 数据模型, 矢量, 栅格
-
114浏览
-
0点赞
-
0收藏
-
0分享
-
125下载
-
0评论
-
引用
【期刊论文】地理信息系统基础软件吉奥之星NT版的总体设计思想与关键技术*
龚健雅, 朱欣焰, 李爱勤, 吴华意
武汉测绘科技大学学报,1997,22(3):187~190,-0001,():
-1年11月30日
介绍了新一代面向对象的GIS基础软件系统吉奥之星NT版的总体设计思想、系统结构、功能特点和有关关键技术。
面向对象, 空间数据库, 地理信息系统, 空间分析, 互联网络
-
96浏览
-
0点赞
-
0收藏
-
0分享
-
171下载
-
0评论
-
引用
【期刊论文】Design and implementation of a distributed large-scale spatial database system based on J2EE
龚健雅, Jianya Gong a, Nengcheng Chen*, a, Xinyan Zhua, Xia Zhang a
Editor, Proceedings of SPIE Vol. 4886 (2003),-0001,():
-1年11月30日
With the increasing maturity of distributed object technology,CORBA,.NET and EJB are universally used in traditional IT field. However, theories and practices of distributed spatial database need farther improvement in virtue of contradictions between large scale spatial data and limited network bandwidth or between transitory session and long transaction processing. Differences and trends among of CORBA,.NET and EJB are discussed in details, afterwards the concept, architecture and characteristic of distributed large-scale seamless spatial database system based on J2EE is provided, which contains GIS client application, web server, GIS application server and spatial data server. Moreover the design and implementation of components of GIS client application based on JavaBeans, the GIS engine based on servlet, the GIS Application server based on GIS enterprise JavaBeans(contains session bean and entity bean) are explained.Besides, the experiments of relation of spatial data and response time under different conditions are conducted, which proves that distributed spatial database system based on J2EE can be used to manage, distribute and share large scale spatial data on Internet. Lastly, a distributed large-scale seamless image database based on Internet is presented.
distributed object technology,, distributed GIS,, J2EE,, vector data,, response time,, JavaBeans,, EJB
-
59浏览
-
0点赞
-
0收藏
-
0分享
-
167下载
-
0评论
-
引用