现代地图科学与地理信息工程科学技术的成就和任务   总被引：8，自引：5，他引：8  

王家耀 《测绘学院学报》2004,21(4):235-240

回顾了地图科学与地理信息工程科学技术的发展进程．总结了地图科学与地理信息工程科学技术的主要成就，分析了它给予经济建设、国防建设、社会发展和人类文明进步的贡献。剖析了地图科学与地理信息工程科学技术面临的挑战；探讨了地图科学与地理信息工程科学技术的任务。  相似文献   

基于探元直方图匹配的CBERS-01星CCD数据相对辐射校正方法   总被引：3，自引：0，他引：3  

潘志强  顾行发  刘国栋  闵祥军 《武汉大学学报(信息科学版)》2005,30(10):925-927

提出并实现了基于探元直方图匹配的相对辐射校正方法。首先以探元为单位对CBERS01星CCD0级数据进行统计,然后基于直方图匹配方法建立每个探元的直方图查找表,用直方图查找表对01星数据进行相对辐射校正。该方法较好地解决了探元的非线性响应问题,图像处理质量有很大提高,为01星CCD数据的更广泛应用奠定了基础。  相似文献   

气象地理信息系统的设计与实现   总被引：9，自引：3，他引：9       下载免费PDF全文

刘品高江南  谭萍佘万明  葛毅华丁岳强  唐林许霖 《应用气象学报》2005,16(4):547-553

微软.NET平台上采用C#语言编程, 从低层开发成功面向气象应用的专题型地理信息系统———气象地理信息系统 (MeteoGIS)。该系统以满足气象防灾减灾工作对GIS功能的迫切需求为目标, 实现了一个拥有自主版权的独立GIS内核, 不依赖于任何商业GIS系统及其二次开发接口。介绍了该系统开发的背景、目的、意义与若干关键技术, 简述了该系统的结构、功能与推广应用前景。  相似文献   

Transboundary biodiversity conservation of the Pha Taem Protected Forest Complex: A bioregional approach     

Yongyut Trisurat   《Applied geography (Sevenoaks, England)》2006,26(3-4):260-275

With the financial assistance from the International Tropical Timber Organization (ITTO), the Thailand's Royal Forest Department (RFD) has initiated a strategy for cooperation in transboundary biodiversity conservation with Cambodia and Laos. The Pha Taem Protected Forest Complex (PPFC) in northeastern region was chosen as a pilot project because of the increasing pressure on biodiversity from illegal trade in plants and wildlife across the tri-national borders. The PPFC covers five protected areas in Thailand and adjoins the Phouxeingthong National Biodiversity Conservation Area (NCBA) in Laos and the Cambodia's Protected Forest for Conservation of Genetic Resources of Plants and Wildlife. Two important outputs derived from the project phase I (2001–2004) were a long-term management plan in a framework of transboundary biodiversity conservation and initiative cooperation between the three countries. Cooperation is achieved at certain level and Laos is reluctant to nominate the Phouxeingthong NBCA for inclusion in the project's second phase. In addition, forest cover in buffer zone has been encroached for agricultural practices. The ecological management zones using bioregional approach was developed to provide a framework for transboundary biodiversity conservation in the adjoining protected forests and reducing the conflict of resource uses by local residents in the buffer zone.  相似文献   

X荧光分析仪在新疆某地的应用   总被引：1，自引：0，他引：1  

花永涛  程锋  赖万昌  杨强 《物探与化探》2006,30(4):370-373

介绍新一代X射线荧光分析仪在新疆某地的勘查应用,并采用几种方法对基体效应、湿度效应、不平度效应进行效正。该仪器可同时显示20余种元素的含量,测试结果证明,X荧光技术是一种快速、经济、有效的方法。  相似文献   

基础地理信息数据传输网络资源管理策略的研究     

张海涛  庞京辉  李慧力 《北京测绘》2006,(1):1-4

通过对基础地理信息数据传输网络中资源类型的明确划分,在备份资源、服务器资源、客户机资源、网络资源和数据库资源等方面进行了深入的分析,对其中的技术细节、管理策略、资源配置等进行了剖析,提出了完整的资源管理实施方案。  相似文献   

Neutron Activation Analysis, Atomic Absorption and X-Ray Fluorescence Spectrometry Review for 2004–2005     

L. Paul Bédard 《Geostandards and Geoanalytical Research》2006,30(3):183-186

These technologically mature techniques occupied a stable to modestly increasing sector of the spectrum of analytical methods in Earth and environmental sciences in 2004–5. Despite this, several notable advances were reported in this two year period. In the field of X-ray fluorescence spectrometry, these included the development of portable synchrotron and total reflection instruments, the use of pyroelectric crystals as X-ray generators, introduction of high-purity Ge detector arrays, and the development of an XRF imaging spectrometer with the capability of mapping analytes and X-ray intensity ratio. Atomic absorption s spectrometry saw major work published on high-resolution continuum source AAS (HR-CS AAS) involving the development of a xenon short-arc lamp. Other advances included the use of laser wave mixing in a graphite furnace tube (with a claimed detection limit of 10–¹⁶ g g-¹), solid sampling and ultrasound in sample preparation. Neutron activation analysis saw two innovations that may herald future growth in this technique, namely a neutron source free of a nuclear reactor and a detector operating at room temperature.  相似文献   

SuperMap Object在地震灾害预估中应用浅析   总被引：4，自引：0，他引：4  

陈鲲  高孟潭 《中国地震》2006,22(3):327-332

用基于易损性矩阵基础上的城市震害预估方法，计算调整损失比后的经济损失，其中包括等震线模型、城市震害模型及建筑物直接经济损失模型等的设计与实现，并针对我国城市的具体情况，编制了一套《城市震害预估及房屋易损性矩阵数据库实时更新软件》，为我国震害预估技术的深层次开发打下坚实的基础。  相似文献   

Monitoring of protected bands of Terkos drinking water reservoir of metropolitan Istanbul near the Black Sea coast using satellite data     

H. Gonca Coskun  Ozlem Gulergun  Levent Yilmaz 《International Journal of Applied Earth Observation and Geoinformation》2006

In this study, remote sensing (RS) with computer-based geographic information systems (GIS) techniques are used as a tool for monitoring the water basin area and water quality in Istanbul's relatively less polluted and comparatively less destroyed catchment of the metropolis drinking water dam reservoir named Terkos. It is necessary to work with recent data to be able to identify the effects of urbanization on the water quality of the Terkos dam catchment area that supplies drinking water to the metropolis. RS is an important tool to monitor water quality and urban terrain. For this aim, a project has been initiated at the Technical University Remote Sensing Laboratory, under the Istanbul Water and Sewerage Administration (ISKI) sponsorship in Istanbul. The project uses SPOT-PAN, XS and IRS-1C/D PAN and satellite data of 1993 and 2000 for urban analysis and Landsat-TM and LISS-III satellite data of 1992 and 2000 for water quality. For calibration and validation, ground truth samples are collected from the experimental area. The RS data was converted into the UTM coordinate system and image enhancement and classification techniques are used. Raster data is converted to vector data to assess the study area for analyzing in GIS for the purpose of planning and decision-making on protected water basin zones. As a result of monitoring land use and water quality changes, recommendations are made for planning and management of the protected environment of the Terkos catchment protected area. Measuring land use change is a very important issue for controlling the future development of the basin, GIS techniques are performed and results are illustrated in established models on the four protected zones of Terkos water basin.  相似文献   

Quality of service management framework for dynamic chaining of geographic information services     

Richard Onchaga 《International Journal of Applied Earth Observation and Geoinformation》2006

Dynamic chaining of geographic information services (geo-services) is gaining popularity as a new paradigm for evolving flexible geo-information systems and for providing on-demand access to geo-information. In dynamic chaining, disparate geo-services are discovered and composed at run time to yield more elaborate functionality and create value-added geo-information. Common approaches to service chaining discover and compose disparate geo-services based on the functional capability of individual geo-services. The primary concern of common approaches is thus the emergent behavior of the resulting composite geo-service. However, as geo-services become mundane and take on a greater and more strategic role in mission critical processes, deliverable quality of service (QoS) becomes an important concern. QoS concerns operational characteristics of a service that determine its utility in an application context. To address pertinent QoS requirements, a new approach to service chaining becomes necessary. In this paper we propose a QoS-aware chaining approach in which geo-services are discovered, composed and executed considering both functional and QoS requirements. We prescribe a QoS management framework that defines fundamental principles, concepts and mechanisms which can be applied to evolve an effective distributed computing platform for QoS-aware chaining of geo-services – the so-called geo-service infrastructure. The paper also defines an extensible QoS model for services delivered by dynamic compositions of geo-services. The process of orthophoto generation is used to demonstrate the applicability of the prescribed framework to service-oriented geographic information processing.  相似文献