多源地理空间矢量数据集成与融合方法探讨

针对人们对地理空间数据迫切需求,介绍了多源地理空间矢量数据产生的管理与技术原因及其5种表现形式,提出了多源地理空间矢量数据集成与融合的概念及其相互关系。论述了地理数据模型的融合、地理要素语义的融合和地理数据投影和坐标系的统一是多源地理空间矢量数据集成与融合基本理论与方法。给出了实现多源数据集成的数据格式转换、数据互操作和直接数据访问方法。最后,讨论了地理要素几何位置的融合,以及通过地理要素语义融合消除地理要素数据描述和属性差异的矢量数据融合方法。     

地理信息服务质量(QoGIS):概念和研究框架

在探讨地理数据特点的基础上，提出了地理信息服务质量（QoGIS）的概念和研究框架，设计了一个体现地理信息服务质量的原型系统架构。     

C++虚拟继承状态下对象复制语义的分析研究

分析C 虚拟继承状态下的对象复制语义学.通过分析当前主流C 编译器对这个语义的支持情况,比较了它们之间实现上的差异;最后提出一种基于软件编码的实现方案,并比较了各种方案的性能优劣,以求更大限度的发挥C 的性能.     

Evaluating the fitness for use of spatial data sets to promote quality in ecological assessment and monitoring

This article proposes and illustrates a practical methodological framework to evaluate the fitness for use of spatial data sets for environmental and ecological applications, focusing on user requirements for specified application contexts. The methodology is based on the use of metadata to analyze similarity between the data characteristics and the user’s needs or expectations for several quality indicators. Additionally, the concept of ‘critical factors’ is introduced in this framework, allowing users to define which quality indicators have greater importance given their own requirements or expectations and the specified application contexts. The proposed methodology further allows integrating and interconnecting the spatial data quality (SDQ) evaluation methodology with metadata geoportals in WebGIS platforms, facilitating its operation by users from non-spatial disciplines and with often limited expertise on this subject. Examples of the evaluation of fitness for use for specific application contexts within the project BIO_SOS (‘Biodiversity Multi-SOurce Monitoring System: From Space To Species’ FP7 project) are presented. By providing a prompt and straightforward evaluation tool, the proposed methodology can encourage the implementation of SDQ evaluation routines in ecological assessment and monitoring programs, promoting a more adequate use of geospatial data and ultimately contributing to well-supported policy and management decisions.     

Geospatial spreadsheets with microscale air quality visualization and synchronization for supporting multiple-scenario visual collaboration

A major obstacle of the interdisciplinary communications for decision-making is that each participant prefers the solution from their own area because current collaboration systems cannot effectively mediate among many alternatives. If a visual collaboration system could display multiple alternatives in a single visual presentation, users would be able to compare alternatives with only a few variables, where all other parameters are fixed, at least from a visual perspective. In this study, we developed a visualization tool to support a microscale air quality (MSAQ) management group, the members of which often need to compare the effects of many alternative control methods. The main achievements of this study are: (1) three-dimensional (3D) visualization of the MSAQ using a 3D city model and (2) development of a geospatial spreadsheet (GS) to facilitate visual comparisons, thereby improving decision-making by making it easy to compare differences based on realistic visual display items. A questionnaire-based survey showed that use of the GS could generate a shared perspective and provide a spatiotemporal context for the participants, thereby making it easy to compare, mediate and reach decisions when confronted with many alternatives.     

基于全景影像的增强地理现实配准方法研究

介绍基于全景序列影像的增强地理现实构造方法,分析地理现实、地理空间数据以及全景序列影像三要素间的关系和研究的趋势。结合柱面投影理论实现地理空间数据到全景序列影像的转换,完成由虚拟空间向真实空间的定位配准,并给出一种用于验证可行性的非平均特征点采样方法,为进一步研究提供理论基础。     

The GeoCitizen-approach: community-based spatial planning – an Ecuadorian case study

Over the last years, geospatial web platforms, social media, and volunteered geographic information (VGI) have opened a window of opportunity for traditional Public Participatory GIS (PPGIS) to usher in a new era. Taking advantage of these technological achievements, this paper presents a new approach for a citizen-orientated framework of spatial planning that aims at integrating participatory community work into existing decision-making structures. One major cornerstone of the presented approach is the application of a social geoweb platform (the GeoCitizen platform) that combines geo-web technologies and social media in one single tool allowing citizens to collaboratively report observations, discuss ideas, solve, and monitor problems in their living environment at a local level. This paper gives an account of an ongoing participatory land-zoning process in the Capital District of Quito, Ecuador, where the GeoCitizen platform is applied in a long-term study.     

目标相似性的矢量数据联动更新方法

针对地理空间矢量数据更新和相似性在地理信息领域应用的研究现状,文章分析了不同几何类型目标之间的几何相似性,结合属性相似度,提出了针对数据联动更新的目标相似性的计算模型以及目标匹配方法;在此基础上,提出了数据变化发现和提取方法,并依据数据之间的映射关系实现多重表达矢量数据的联动更新。最后以某省矢量数据的水系要素之间联动更新为实例,证明了本数据联动更新方法能够完成多重表达地理空间矢量数据的更新,同时保证数据之间的一致性。     

海南国际旅游岛数字地理空间框架建设与应用

数字城市和数字省区相互之间既有明确的层次关系,同时共性中又有着个性。本文首先简单介绍海南国际旅游岛数字地理空间框架建设的总体架构,重点阐述框架建设项目的主要建设情况以及推广应用情况。     

百色市园林绿化管理信息系统建设探讨与分析

根据百色市对园林绿化管理的实际需求,利用数字百色地理空间框架提供的基础地理信息数据和空间信息技术,建设百色市园林绿化管理信息系统。作者在完成多个数字城市地理空间框架建设示范应用系统建设基础上,对百色市园林绿化管理信息系统建设进行探讨与分析,为正在建设或尚未开始建设相关/信息系统的单位部门提供有益参考。