搜索结果: 1-15 共查到“工学 GML”相关记录22条 . 查询时间(0.062 秒)
GML-an Open-Standard Geospatial Data Format
GML Internet Spatial Data Sharing Geometry Visualization
2015/12/18
In the last three decades, dozens of GIS data formats have been developed for encoding geographic information. Most were specified formats to particular vendor’s GIS software. A few were open standard...
The Web Feature Service (WFS) developed by the Open GIS Consortium (OGC) provides geographic data encoding in Geographic Mark Language (GML) on feature level. The WFS specification defines interfaces ...
Study on GML Storage Model Based on Native XML Database
GML XML Native XML Database GML Storage JTS XQuery
2015/12/11
As a mature spatial interoperability specification of OGC, GML rapidly plays an important role in a large number of GIS research and application domains, such as spatial data modelling, transmission a...
Spatial Data Sharing and Interoperability Based on Web Spatial Data Service and GML
Spatial Data Sharing Interoperability Web Service GML
2015/10/12
In recent years, China made great progress in the field of Spatial Data Infrastructure. But spatial data sharing and interoperability was
not taken into inadequate consideration. In this paper, thre...
APPLICATION OF GML-BASED GEO-METADATA FOR DATA QUALITY INFORMATION MANAGEMENT AND DISSEMINATION ON THE WEB
Data Quality In-situ sensor Interoperability GML Metadata
2015/9/28
Nowadays developing geo-metadata with the capacity for data quality management and dissemination plays an important role in GIS/Geomatics world. Data quality information embedded in geo-metadata helps...
A GML SCHEMA MAPPING APPROACH TO OVERCOME SEMANTIC HETEROGENEITY IN GIS
Application Schema Mapping GIS interoperability Ontology
2015/8/28
With the increasing need of spatial data in various decision support systems, the access and sharing of geospatial data over the
Internet has become an important issue. But the underlying heterogenei...
Developing an Internet-gis Application Using Gml Technology
Web-based Internet Interoperability
2015/7/9
Spatial Data as one major component of every GIS System has faced many challenges these years. Each software uses its own data format
and exchanging from one format to another may cause some problems...
Schema Translations by Xslt for Gml-encoded Geospatial Data in Heterogeneous Web-service Environment
Web based Integration Interoperability Mobile Internet
2015/7/6
The paper discusses online integration of XML-encoded datasets in the current Web services environment, especially concentrating
on the required schema transformations. The approach is based on the u...
THE DEVELOPMENT OF ALGORITHMS FOR ON-DEMAND MAP EDITING FOR INTERNET AND MOBILE USERS WITH GML AND SVG
Spatial Information Sciences GIS Research Internet Interoperability
2015/7/6
The widespread availability of the World Wide Web has led to a rapid increase in the amount of data accessing, sharing and
disseminating that gives the opportunities for delivering maps over the Inte...
XML/GML非空间数据查询的结构连接算法
可扩展标记语言 地理标记语言 编码索引
2010/1/29
为利用Dewey前缀编码索引方案实现对XML/GML文档的编码并消除其缺点，提出一种扩展的Dewey编码方案——Ex-Dewey。在保留Dewey前缀编码优点的同时提出节点插入及删除对已有节点编码值串无影响的更新策略。针对Ex-Dewey编码方案提出一种在XML/GML非空间数据查询时快速确定候选节点间先辈-子孙、父-子关系的结构化连接算法——ED-XQ-SJ。给出算法思想、描述与验证。该算法无须...
城市GML文档三维特征的快速获取与可视化
城市地理标记语言GML 开放式地理信息系统协会 3D特征
2009/10/12
随着网络技术的发展，对城市三维数据的需求愈益增加，然而众多的城市三维数据缺乏统一的模型，使数据不能有效地进行共享与交互。开放式地理信息系统协会（Open GIS Consortium，OGC）提出了地理标记语言（Geography Markup Language，GML），城市GML规范定义了城市空间信息模型的标准，有利于三维数据在网络上进行传输、共享。通过分析城市GML文件的结构，提出一种适合一...
首先论述了近年来飞速发展的Web GIS的现状及面临的技术难点,然后介绍XML(Extensible Markup Language),GML(Geography Marker Language),SVG(Scalable Vector Graphics)的发展情况以及它们在WEB GIS中的应用前景,论文最后提出了今后企业级Web GIS的解决方案.
以Feature元素为单元的GML文档扩展区域编码ER-Code
GML路径查询 预留编码空间 扩展区域编码
2009/9/17
根据GML数据路径查询中同时进行Feature元素包含关系以及Feature几何特性拓扑关系判断的需要，在研究传统XML路径编码方法的基础上，设计一种以Feature元素为单元的GML文档扩展区域编码：ER-Code。实验证明：ER-Code在编码初始构造、基于编码的整体查询等方面均具有较好的性能，把ER-Code与Feature的空间几何特性融合为一个整体空间，可大大提高GML数据路径查询的效率...
GML空间数据流压缩算法研究
GML 压缩 多线程
2009/5/14
提出了一种新的GML数据流压缩算法。研究了GML结构与数据动态分离并动态压缩，采用多线程技术进行并行传输，再在接收端动态解压并动态合并的过程。实验结果表明，该方法对大幅提高GML数据传输效率具有实际意义。