Integration technology research on marine geographical information system

It is urgent and necessary to integrate a marine geographical information system （MGIS） with marine remote sensing detection modules. On the basis of the current technology and features of applications, an open three-layer integration framework is designed. At the data layer, a two-level three-base integration mechanism based on the plug-in technology is applied; At the function layer, an integration mode based on API, DLL, EXE and COM is discussed; and at the application layer, a sharing mechanism based on the clients/service is adopted. As an example, the remote sensing integrated application information system of China＇s coastal zone and offshore （MaXplorer1. 0） with muhiecology remote sensing fusion and assimilation module, surge detection module as well as eight other thematic application modules is integrated, and the key technology of integration is discussed at different layers and in different modules. The result shows that it is possible to realize the conformity of technology and resources and to provide the incorporate technology platform for marine information operational functioning after applying the integration framework.

A tentative discussion on the method ofcomprehensive integration of geographicinformation

In the era of information, geography has made remarkable progress in the development of its research objective and approaches. Geographic information System (GIS), which is similar to the quantitative geography developed in the 1950s to the 1970s, is broadly accepted in moderm tinies.However, limitations caused by the functions of GIS, and the complexity of geographic environment has provoked people to find a new research method to meet the demand stemmed from geographical researches. This paper firstly looks back on the history of geographical research methods and makes an analysis of their limitations', then, makes a prospective view on the GIS and its related fields.Based on thes, the paper presents a new research method: comprehensive integration of geographic information, which is guided by Meta-Synthetic-Engineering in methodology and supported by modem technology. Aiming to exploit a kind of research method, discussion on comprehensive integration of geographic information is given to try to answer how geography will develop in the era of information. It will help us to realize much higher hierarchical and macro-systematic comprehension about geographic environment.

Application of Remote Sensing and Geographic Information System in Land Use and Land Cover Change

The integration and application of remote sensing （RS） and geographic in-formation system （GIS） in the study of the Land Use and Land Cover Change （LUCC） were summarized, as wel as researches on the monitoring dynamic changes in LUCC, driving force and application examples of the integration and the application of RS and GIS in simulation research. The methods and technical ap-proaches of RS and GIS in LUCC research were discussed. Views on the existing problems of the integration and the application of RS and GIS were put forward, and the future developing direction of LUCC technology was forecasted.

Design and Key Technology of Gardening Information Management System Based on Data Center

To provide scientific management basis for the garden planning, project construction, maintenance, social service, this paper prompted that the urban gardening administration sectors need to construct gardening information management system. On the basis of fully requirements analysis of gardening sectors, this paper discussed the key technology for system construction. It also proposed to flexibly and smartly build up the system by using the secondary development design environment and running environment based on data center integration development platform. This system greatly helps the daily management and plays very important role in improving urban ecological environment and investment environment.

Integrating geographical information in the Linked Digital Earth

Many progresses have been made since the Digital Earth notion was envisioned thirteen years ago.However,the mechanism for integrating geographic informa-tion into the Digital Earth is still quite limited.In this context,we have developed a process to generate,integrate and publish geospatial Linked Data from several Spanish National data-sets.These data-sets are related to four Infrastructure for Spatial Information in the European Community(INSPIRE)themes,specifically with Administrative units,Hydrography,Statistical units,and Meteorology.Our main goal is to combine different sources(heterogeneous,multidisciplinary,multitemporal,multiresolution,and multilingual)using Linked Data principles.This goal allows the overcoming of current problems of information integration and driving geographical information toward the next decade scenario,that is,‘Linked Digital Earth’.

Three-Dimensional Cooperative Localization via Space-Air-Ground Integrated Networks

The space-air-ground integrated network(SAGIN)combines the superiority of the satellite,aerial,and ground communications,which is envisioned to provide high-precision positioning ability as well as seamless connectivity in the 5G and Beyond 5G(B5G)systems.In this paper,we propose a three-dimensional SAGIN localization scheme for ground agents utilizing multi-source information from satellites,base stations and unmanned aerial vehicles(UAVs).Based on the designed scheme,we derive the positioning performance bound and establish a distributed maximum likelihood algorithm to jointly estimate the positions and clock offsets of ground agents.Simulation results demonstrate the validity of the SAGIN localization scheme and reveal the effects of the number of satellites,the number of base stations,the number of UAVs and clock noise on positioning performance.

A Numerical Solution for the Integrated Analysis of Water Resources Management: Application to the Mero River Watershed, La Coruña, Spain

This research is concerned with new developments and practical applications of a physically-based numerical model that incorporates new approaches for a finite elements solution to the steady/transient problems of the joint ground/surface water flows. Python scripts are implemented in Geographic Information System (GIS) to store, represent and take decisions on the simulated conditions related to the water resources management at the scale of the watershed. The proposed surface-subsurface model considers surface and groundwater interactions to be 2-D horizontally distributed and depth-averaged through a diffusive wave approach for surface flood routing. Infiltration rates, overland flows and evapotranspiration processes are considered by a diffuse discharge from surface water, non-saturated subsoil and groundwater table. Recent developments also allow for the management of surface water flow control through the capacity of diversion on river beds, spillways and outflow operations of floodgates in weirs and dams of reservoirs. Practical application regards the actual hydrology of the Mero River watershed, with two important water bodies mainly concerned with the water resources management at the Cecebre Reservoir and the present flooding of a deep coal mining excavation. The MELEF model (Modèle d’éLéments Fluides, in French) was adapted and calibrated during a period of five years (2008/ 2012) with the help of hydrological parameters, registered flow rates, water levels and registered precipitation, water uses and water management operations in surface and groundwater bodies. The results predict the likely evolution of the Cecebre Reservoir, the flow rates in rivers, the flooding of the Meirama open pit and the local water balances for different hydrological components.

Quality assessment of volunteered geographic information for outdoor activities:an analysis of OpenStreetMap data for names of peaks in Japan

Geographical studies of outdoor activities have increased in recent years with the rise in popularity of these activities worldwide,including in Japan.Volunteered geographic information(VGI)is a key tool for organizing outdoor activities as it offers a means to determine the locational information and names of places.To evaluate the quality of VGI,geospatial data generated by land survey agencies and other VGI are often utilized as reference data.However,since these reference data may not be available,other methods are necessary to assure the quality of VGI.In this study,we examined five trust indicators based on the inherent characteristics of VGI through an empirical case study.We used mountain names extracted from OpenStreetMap in Japan as data because there were almost no other VGI in the vicinity.As a result,we isolated three trust indicators,namely versions,users,and tag corrections,to examine the thematic accuracy of VGI because these were the only statistically significant indicators.However,we found that the prediction rate of thematic accuracy was very low.To improve thematic accuracy,this study recommends using the most accurate versions,applying correctly given tags,and considering the motivations and characteristics of the VGI contributors.

Development of an Integrated System to Enhance Spatial Data Processing & Management for Planning Authorities

In a world where there is constant data generation and processing, the need for an integrated system cannot be overemphasized. The systems that enable storage of large amounts of spatial data and must be made available to multiple users in real time. Studies have shown that standalone desktop spatial systems are often rigid and inflexible to support multiple data processing or demands from multiple users. The integrated spatial management system was designed to address the above highlighted challenges by bringing enhanced possibilities of utilization of spatial data though improving accessibility, visualization, and processing spatial information. The present work employed a mixed approach of qualitative and quantitative techniques to obtain the desired result. Qualitative data collection tools were used to collect field data required to design the prototype. The research sought to establish whether the integrated systems are in use by the targeted institutions, the findings highlighted that 71.4% have no integrated spatial data systems while 28.6% have partial-integrated systems. An overview of the architecture of integrated spatial systems consists of a well distributed database linked to multiple tools and platforms to query both the spatial and non-spatial data. The WEB-GIS and Mobile GIS interfaces were developed to allow multiple users to access information through the web in real time and data collection, respectively.

《资源信息学》产教融合项目体验式教学探索

产教融合建设新工科是企业岗位能力需求与高校课程质量提高深度融合的新形态,专业课程成为落实产教融合的基本载体。归纳了专业课程产教融合面临的教学资源统筹、教学过程组织、教学评价互动等方面的问题,设计了面向产教融合的专业课程项目体验式教学模式,提出了产业型项目构建和体验式教学实施的途径,并将该教学模式应用于《资源信息学》教学中。该教学模式有助于增强产业和教学之间的互动,提高教学效果,培养高质量专业人才。

滇池流域生态系统完整性变化及其驱动机理实证研究

滇池流域是长江水源的重要涵养地和我国西南的生态安全屏障,其生态系统完整性变化是整个流域生态系统质量和稳定性的重要体现,对生态系统保护和修复具有重要指导意义。通过ArcGIS空间分析、地理探测器模型和皮尔逊相关分析等方法,基于生态系统结构、功能和弹性三方面构建综合指数,评估2000—2020年滇池流域生态系统完整性时空变化,分析生态系统完整性演变的驱动因子及其作用机理。结果表明:(1)滇池流域生态系统完整性先下降后上升,但整体有所降低,其中结构完整性明显降低、生态系统弹性显著减弱。(2)生态系统完整性在空间上呈中部低四周高的分布格局,完整性高的区域分布在城市外围的山体,靠近滇池北部的中心城区则较低;全流域36.24%的区域完整性降低、35.31%的区域升高。(3)生态系统完整性的时空变化受自然条件和人文社会经济等多种因素的共同影响,高程、气温和土地利用变化是主导因子,完整性与高程呈正相关,与气温呈负相关,但土地利用变化的影响具有双重性。研究结果可为流域生态系统完整性评估提供新思路,同时为滇池流域生态系统的管护提供科学依据。

产教融合-数字赋能驱动下的本科毕业实习模式创新实践

贯彻国家产教融合和推行教育数字化指导方针,结合国家一流专业建设需求,拓展实习教育教学的数字赋能新路径,针对中国矿业大学地理信息科学专业毕业实习模式存在的组织形式欠灵活、实习内容欠全面、质量评价欠科学、数字元素欠融入等问题,构建了“线上下结合-校企联动”的毕业实习创新模式,并从校企实习基地联合共建,实习实训内容共同制定,线上线下实践协同组织和实习质量多方联动评价4个维度开展了实践探索,为我校地理信息科学专业毕业实习质量和人才培养水平提升提供支持,也可作为产教融合-数字赋能毕业实习和实践教学的新示范。

基于地名地址的多源异构数据融合方法研究

为解决不同行业政务信息资源的融合,实现智慧城市各行业数据的共享,深入挖掘和发挥数据价值,提出一种基于地名地址匹配的数据融合方法,分别对含空间坐标和仅包含位置描述的两种不同类型政务数据进行匹配,提出利用分区单元计算、构建分级分词地名地址数据库和文本模糊匹配等关键技术,提高了地名地址匹配的效率和准确度。并通过在智慧蓉城建设项目中实践应用,证实该方法能有效提升匹配效率和精度,实现多源、异构、海量政务数据的高效融合。

基于DMGIS的地下管线探测系统设计与实现

通过对传统管线探测作业模式与内外业数据处理流程的分析,给出地下管线探测内外业一体化软件系统的设计方案。软件包括基于分布式移动地理信息服务技术的移动端外业数据采集系统和基于AutoCAD平台的内业数据处理系统。通过优化作业流程,实现管线探测外业与内业数据处理的一体化。应用在电力行业线缆工程勘察领域的实例表明,软件可以提高管线探测效率,提升管线成果质量,降低工作复杂度,为管线工程设计、施工提供良好的技术支持。

地图制图技术在地理信息系统数据中的应用

利用计算机辅助人工的地图制图技术具有制图效率低下、周期长等缺陷,无法满足时代发展需求。该文通过简要介绍地理信息系统概念、数据特征、地图制图技术概念,在明确地图制图技术在地理信息系统数据应用中的研究现状的前提下,以某省地理国情普查地图集制作为例,探讨借助WJ-Ⅲ软件实现的自动化地理制图技术在地理信息系统数据中的应用实例,证实自动化地图制图技术能够大幅提升制图效率,为实现省内国情数据图库一体化提供技术保障。

基于GIS+BIM的地铁工程实景三维可视化关键技术及应用

针对地铁工程项目可视化管理中存在的模型精细化不足、数据集成与展示不充分及真实性欠缺等问题,本研究提出了利用GIS和BIM技术作为解决方案,提升地铁工程实景三维建设的效果。首先研究构建了地铁工程实景三维平台的建设框架,分析了数据集成与融合、动态层次加载、模型轻量化与显示等关键技术。随后以深圳地铁14号线工程为案例,进行了实景三维可视化平台的建设与功能应用。案例涵盖了工程建设管理图、空间分析可视化、多视角场景漫游及BIM可视化与属性查询等内容,实现了地铁工程项目多源异构数据与模型的集成,提供了多尺度的实景三维可视化展示,为项目管理与决策提供了有力支持。

一体化测绘技术在城市基础地理信息数据更新中的应用

基础地理信息数据是城市发展建设的重要工具,需要做好相关更新工作。文章以一体化测绘技术为研究对象,阐述了其基本概念,分析其在城市基础地理信息数据更新中的应用价值,从内外业、采编、网络单元数据、图库、图层等维度详细分析了一体化测绘技术在城市基础地理信息数据更新中的具体应用,提供多种地图一体化综合测绘方法,旨在为更多测绘人员提供技术指导,保障城市基础地理信息数据的及时更新,为我国各地有序发展打下扎实的基础。

Assessment of Agricultural Soil Quality Indices Using Mechanistic Models

Assessing soil quality is a critical strategy for diagnosing soil status and anticipating concerns in land use systems for agricultural sustainability. In this study, two soil quality assessment indices, the Integrated Quality Index (IQI) and Nemoro Quality Index (NQI), were employed using two indicator selection methods: Total Data Set (TDS) and Minimum Data Set (MDS), focusing on agricultural fields in Golestan province, Iran. A total of 89 soil samples were collected and analyzed for particle size distribution, organic carbon, calcium carbonate equivalent (CCE), electrical conductivity (EC), pH, and plant-essential nutrients, including nitrogen, phosphorus, potassium, zinc, copper, manganese, and iron. Principal component analysis (PCA) was used to extract MDS from TDS, and geostatistical adaptation and correlation analyses were performed to determine the optimal soil quality evaluation index. Our results show that the exponential model better suits the spatial structure of soil quality indicators (IQIMDS: 0.955). Conformity and correlation analyses indicate that the IQI index outperformed the NQI index in estimating soil quality. The superiority of the TDS technique over the MDS technique in terms of accuracy (IQITDSs kappa: 0.155). Linear relationships between different methods showed a higher correlation coefficient (R2 = 0.43) through the application of IQI. This study suggests the use of IQIMDS to provide a reliable measurement that is particularly useful in assessing the quality of agricultural soil.

测绘地理信息类专业产教融合实践教学研究

在经济和产业结构快速发展的背景下,测绘地理信息专业对实践能力的要求显著提高。地方本科院校在实践教学中面临资源不足、校企合作不深入等问题,限制了学生的工程实践能力培养。为应对这些挑战,本文提出强化产教融合,优化教学资源,深化校企合作,提升竞赛激励,完善教学环节,创新教学方法,并建立以成果为导向的质量保障机制。通过产教融合的深入推进和数据驱动的评价体系,及时调整实践教学内容和方法,以提高实践教学质量和学生的综合素质。这些措施旨在培养符合现代产业需求的高素质应用型人才,提升地方本科院校的教育质量和市场竞争力。

涉铁市政工程数字化设计及集成交付方案研究与应用

为解决涉铁市政工程建设周期紧、施工安全要求高、管理数据来源多等难题,提出了基于BIM(Building Information Modeling)+三维地理信息系统(GIS,GeographicInformation System)的数字化设计及集成交付方案。基于扬州市江平东路涉铁市政工程,定制化开发参建单位通用的全生命周期集成交付系统,实现真实场景数字孪生、重要工点导航、虚拟现实模拟驾驶等功能,为项目参建单位全链条沟通和决策提供了可视化工具,大幅提升了工程建设质量与项目管理效益,可为相关涉铁市政工程项目提供技术参考。