雷电灾害风险评估报告制作管理系统设计与实现     

杨召绪  邓宁文  植耀玲  劳炜 《气象研究与应用》2012,33(3):70-73

以GB/T 21714.2为基础,以Delphi7.0为开发语言,融合Gis叠加、Microsoft Word自动化等计算机技术,研制而成了一套程序化、智能化、规范化的多功能业务系统,提高了原有雷电灾害风险评估业务的规范性,缩短了评估流程,提高了评估精度。  相似文献   

倾斜摄影和激光点云技术在大比例尺测图中的应用     

申淑娟  俞志强  黄桦  祝彦敏  吴彬卓 《测绘通报》2017,(12):94-97

在传统大比例尺测图中,建筑物特征线的获取方法或精度高效率低或效率高精度低。本文通过对倾斜三维模型分析,提出了基于直线公理的建筑物特征线快速提取方法;针对高程点数据均为人工采集的现状,引入激光点云数据通过分类插值法自动生成高程特征点。研究证明,本文方法在精度与效率等方面均可取得良好效果,提高了特征线（建筑物线）、特征点（高程点）采集的自动化程度。  相似文献   

城市规划图文一体化办公系统的建立   总被引：7，自引：2，他引：5  

黎栋梁 《测绘科学》2004,29(3):33-35

通过分析城市规划办公自动化的需求和发展状况,结合广州市规划管理的应用实践,总结了GIS与OA 技术相结合在城市规划领域应用的方法、模式,阐述了系统的设计思想和技术集成方法,并举例说明系统的实际 应用效果,为数字规划提供了一个成熟的应用实例。  相似文献   

沈阳天气预报业务自动化平台的开发研制   总被引：7，自引：3，他引：4       下载免费PDF全文

李大为  隋东  黄振 《气象与环境学报》2006,22(2):69-71

为了适应天气预报业务现代化、自动化发展的需要,应用VB,VF,VC,FORTRAN等多种语言,借助于Arcview地理信息系统及其空间分析模块、可视会商视频和9210工程等多项技术,开发研制了沈阳天气预报业务自动化平台,借以提高气象预报工作效率和质量。  相似文献   

RTK测量中基准站的设置问题     

翟翠允  段凌燕  耿志军  薄振龙  贾黎君  张军 《海洋测绘》2007,27(3):63-65

介绍了GPS单点定位及RTK的工作原理,并结合基本原理,对RTK测量中基准站的设置方法进行说明,并着重分析1 n RTK测量中,n台手簿在基准站设置中容易进入的误区,并结合实验数据进行了分析说明,找出错误原因,最后得出基准站正确的设置方法。  相似文献   

Towards automation of palynology 1: analysis of pollen shape and ornamentation using simple geometric measures,derived from scanning electron microscope images     

W. J. Treloar  G. E. Taylor  J. R. Flenley 《第四纪科学杂志》2004,19(8):745-754

This is the first of a series of papers on the theme of automated pollen analysis. The automation of pollen analysis could result in numerous advantages for the reconstruction of past environments, with larger data sets made practical, objectivity and fine resolution sampling. There are also applications in apiculture and medicine. Previous work on the classification of pollen using texture measures has been successful with small numbers of pollen taxa. However, as the number of pollen taxa to be identified increases, more features may be required to achieve a successful classification. This paper describes the use of simple geometric measures to augment the texture measures. The feasibility of this new approach is tested using scanning electron microscope (SEM) images of 12 taxa of fresh pollen taken from reference material collected on Henderson Island, Polynesia. Pollen images were captured directly from a SEM connected to a PC. A threshold grey‐level was set and binary images were then generated. Pollen edges were then located and the boundaries were traced using a chain coding system. A number of simple geometric variables were calculated directly from the chain code of the pollen and a variable selection procedure was used to choose the optimal subset to be used for classification. The efficiency of these variables was tested using a leave‐one‐out classification procedure. The system successfully split the original 12 taxa sample into five sub‐samples containing no more than six pollen taxa each. The further subdivision of echinate pollen types was then attempted with a subset of four pollen taxa. A set of difference codes was constructed for a range of displacements along the chain code. From these difference codes probability variables were calculated. A variable selection procedure was again used to choose the optimal subset of probabilities that may be used for classification. The efficiency of these variables was again tested using a leave‐one‐out classification procedure. The proportion of correctly classified pollen ranged from 81% to 100% depending on the subset of variables used. The best set of variables had an overall classification rate averaging at about 95%. This is comparable with the classification rates from the earlier texture analysis work for other types of pollen. Copyright © 2004 John Wiley & Sons, Ltd.  相似文献   

数字正射影像图制作中图廓整饰自动化研究与实现     

宋起  范亚兵  董少敏  徐波 《测绘与空间地理信息》2017,(12):134-136,138

从作业生产实际需求出发,深入研究了数字正射影像的制作过程和各环节关键技术,通过对大量数字正射影像图像素位置统计对比,并参照相关规范,开发了数字正射影像图制作中图廓整饰自动化工具软件,很好地弥补了传统图廓整饰方法的不足,显著地提高了作业生产效率。该软件已经应用在某测区1∶2 000正射影像图制作任务中。  相似文献   

Usingalarge3Dcelautomationmodeltosimulateenergyfrequency,spaceandtimedistributionofearthquakes     

刘长海  陈军  凌学书 《地震学报(英文版)》1997,10(3):375-378

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基于气象GIS的农业气象情报文本自动化生成技术研究     

李嘉洁  孙涵  华璀 《气象与环境科学》2016,39(2):137-143

农业气象情报(旬、月报及灾情报等)是气象服务于农业的主要信息产品,其自动化水平的高低决定了服务的效率和质量。针对目前情报文本仍需要人工编写,没有实现完全自动化等问题,在Meteo GIS平台的支持下,分析多维农业气象数据的时空分布及变化特征,基于拓扑原理建立气象要素统计特征与专业用语之间的关联关系,运用汉语言语法规则建立语言重组模型,完成语句、段落的规划。通过文档模板定制,实现了观测要素实时分析、图表生成、文字描述的自动化生成。该成果经进一步软件工程化后可集成到气象GIS平台中,以拓展气象GIS的功能,同时也可单独应用于大数据专题服务材料的编写,大幅提升科学数据报务能力。  相似文献   

Event-driven flood management: design and computational modules     

Vinod Kumar Sharma  G. Srinivasa Rao  E. Amminedu  P. V. Nagamani  Abhinav Shukla  K. Ram Mohan Rao 《地球空间信息科学学报》2016,19(1):39-55

Flood management is a set of activities that have to be carried out in collaboration with multiple agencies. Advanced flood information with early warning generated using remote sensing satellite technologies can help the agencies to effectively manage the situation on ground. Various environmental parameters and forecasts provided by different agencies can be analyzed and compared with historical flood events for generating probable flood event alerts. The information (environmental parameters) provided by the agencies are heterogeneous and noncompliant to standards and distributed in nature. Synchronization of data from distributed resources and automation of data analysis process for flood management is a primary prerequisite for faster and efficient decision-making. Web 2.0-based web services enable data creation, sharing, communication, and collaboration on web. Spatial data sharing on web 2.0 for making quality of service using open-source software for efficient flood management is a challenge. Available software architectures proposed for risk and environmental crisis management are too generic in nature and needs lot of modification for flood management. An event-driven model coupled with data standardization procedures using service-oriented architecture provides an effective framework for flood management. In this paper, a framework capable of collecting heterogeneous distributed flood-related information for analyzing and alerting probable flood events is proposed. The framework has been implemented to generate automatic flood extent maps, by analyzing the distributed satellite data (as service). The automation of flood delineation process reduces the overall flood product generation time. Open-source web tools have been utilized in development of spatial information system to visualize and analyze the actual situation on ground facilitating overall decision-making process.  相似文献