地理信息系统基础软件吉奥之星NT版的总体设计思想与关键技术   总被引：6，自引：1，他引：6  

龚健雅  朱欣焰  李爱勤  吴华意 《武汉大学学报(信息科学版)》1997,(3)

介绍了新一代面向对象的ＧＩＳ基础软件系统吉奥之星ＮＴ版的总体设计思想、系统结构、功能特点和有关关键技术。  相似文献   

Book Reviews     

《The Professional geographer》1997,49(2):257-268

Committee on Protection and Management of Pacific Northwest Anadromous Salmonids Upstream: Salmon and Society in the Pacific Northwest Cook, Ian G; Doel, Marcus A. and Li, Rex (eds.) Fragmented Asia: Regional Integration and National Disintegration in Pacific Asia Crush, Jonathan Power of Development de Blij, H. J., and Muller, Peter O. Physical Geography of the Global Environment Hayward, David J. International Trade and Regional Economies: The Impacts of European Integration on the United States Kennedy, Michael The Global Positioning System and GIS: An Introduction Lowe, Philip; Marsden, Terry and Whatmore, Sarah (eds) Regulating Agriculture Marsden, Terry; Lowe, Philip and Whatmore, Sarah (eds) Labour and Locality: Uneven Development and the Rural Labour Process Marsden, Terry; Lowe, Philip and Whatmore, Sarah (eds) Rural Restructuring: Global Processes and Their Responses Whatmore, Sarah; Marsden, Terry and Lowe, Philip (eds) Gender and Rurality Whatmore, Sarah; Marsden, Terry and Lowe, Philip (eds) Rural Enterprise: Shifting Perspectives on Small-Scale Production Martopo, Sugeng and Mitchell, Bruce (eds) Bali: Balancing Environment, Economy and Culture Ould-Mey, Mohameden Global Restructuring and Peripheral States: The Carrot and the Stick in Mauritania Redclift, Michael and Benton, Ted (eds) Social Theory and the Global Environment Thomas–Slayter, Barbara and Rocheleau, Dianne Gender, Environment, and Development in Kenya: A Grassroots Perspective Wallach, Bret Losing Asia: Modernization and the Culture of Development Wennberg, John E. Dartmouth Atlas of Health Care Wilson, David and Huff, James O. (eds) Marginalized Places and Populations: A Structurationist Agenda  相似文献   

开发利用地理信息系统(GIS)综合分析地学信息进行矿产预测   总被引：21，自引：2，他引：21  

向运川  任天祥  杨竹溪 《物探与化探》1996,20(1):1-13

众所周知,矿产资源预测是综合地学信息,进行优选靶区的有效手段之一。随着地学工作的深入和勘探技术的发展,已获取了大量的多源地学信息,如地质、地球物理、地球化学和遥感等资料。怎样从这众多的资料中提取有用信息进行综合分析,达到矿产资源预测的目的,一直是地学界探索的课题。过去,应用人工的方法来进行此项工作,不但费力、投资大,而且难以达到预期的效果,方法技术也不利于推广。如今,高速、高质量的计算机已趋于普及,使应用计算机技术高效地处理堆积如山的资料成为可能,尤其是近些年发展起来的地理信息系统(GIS),为综合处理地学资料的矿产资源预测的方法技术,开拓了广阔的前景。地理信息系统是一种计算机系统的应用软件,它集数据库管理和图像分析技术为一体,以空间数据迭加分析为重要特征。地学工作者进行矿产资源预测时,通常是从多源地学资料中提取有用信息,再应用专家知识,结合数学方法,如逻辑运算、贝叶斯(Bayes)规则等,建立预测模型,以模型的推理网格为线索,利用地理信息系统有效的空间分析手段,把各种证据图层综合迭加,最终产生以概率为指标的矿产资源预测图,高概率指示有利的矿产资源远景区,可作为勘探者和决策者进行勘查规划的依据。  相似文献   

An application of factor analysis for the study of the hydrogeological conditions in Plio-Pleistocene aquifers of NW Achaia (NW peloponnesus, Greece)   总被引：4，自引：0，他引：4  

K. S. Voudouris  N. J. Lambrakis  G. Papatheothorou  P. Daskalaki 《Mathematical Geology》1997,29(1):43-59

R- andQ-mode factor analysis is applied to 51 groundwater samples collected from wells drilled in the Plio-Pleistocene aquifers of NW Achaia, Greece. The purpose ofR- andQ-mode factor analysis application is to identify (i) the regional groundwater flow pattern, and (ii) the deterioration of groundwater quality. Sixteen hydrogeological parameters are used in order to examine their importance and to provide significant insight into their correlations. In theR-mode factor analysis, a six-factor model is suggested which can explain more than 77.5% of the total variance. The contribution of each factor at every site (factor scores) also is computed. Maps are constructed showing the geographical distribution of the factor scores. From these maps, the high salinity areas are delineated (seawater intrusion, possible appearance of halite layers) and the areas with elevated contribution of karastic-water are defined. Using theQ-mode correspondence analysis the meaning of the electrical conductivity as the most important variable in groundwater quality characterization is demonstrated.  相似文献   

坡地系统土壤侵蚀定量评价方法   总被引：6，自引：0，他引：6  

徐恒力  陈植华 《地球科学》1997,22(6):652-655

区域性土壤侵蚀的定量评在涉及到泥沙输移的非连续性难题和众多的非确定性因素，目前应用较普遍的小区定量难以适用。所提出的定量评价方法是利用ＧＩＳ技术、模糊数学、将以分布参数为特征的区域坡地系统划分成若干类具有集中参数特征的基本侵蚀单元，结合ＵＳＬＥ方程来模拟空间上不同侵蚀背景条件下土壤侵蚀的强度，并可以确定影响土壤侵蚀的主要因子及其排序，该方法适用性强，可用于不同空间尺度的土壤侵蚀定量评价。  相似文献   

地理信息技术的发展与应用     

李军政 《陕西地质》2004,22(1):93-100

地理信息系统是国家信息资源的重要组成部分。地理信息技术经过20多年的飞速发展，已经渗透到社会各个方面，促使人们生产、生活方式发生深刻变化。我国地理信息系统(GIS)技术正在向信息化方向发展，并正在逐步成为面向21世纪的支柱产业一信息产业的重要组成部分。国际GIS技术的发展趋势，主要体现在两个方面，一是综合，二是分化。从空间信息处理的角度看，可将GIS的发展分为空间信息的管理、分析、模拟和调控四个阶段。GIS技术的应用表现在一是面向大型项目，二是面向公众。  相似文献   

Web Use in Geographical and Environmental Education: An International Survey at the Primary and Secondary Level   总被引：2，自引：0，他引：2  

Lea Houtsonen  Ilta-Kanerva Kankaanrinta  Antti Rehunen 《GeoJournal》2004,60(2):165-174

This article aims to study Web use and Web-based co-operation and collaboration in geographical and environmental education at the primary and secondary level around the world. Recent trends and future opportunities and challenges are taken into account. The theoretical part of the study considers Web use and different forms of Web-based co-operation. Web use and co-operation in education are classified as co-operative learning, collaborative learning or communal learning. Web use in geographical and environmental education is noted to be growing in significance. Web-based co-operation at any level of intensity is associated with many opportunities and challenges. The empirical part of this study involves a survey of geographical and environmental education researchers in various countries about their views of Web use in education. The results of this survey indicate that the Web in general finds minimal use in geographical and environmental education. As access to the Web is limited and only some pupils can use it, co-operation, particularly collaborative learning on the Web, is still rare in geographical and environmental education. The most often used application is e-mail. Researchers recognise the potential of the Web to enhance local, national and international co-operation, and to facilitate a better understanding of geographical and environmental issues at the grass-root level. Web-based learning can also help to increase and deepen the pupils' cultural understanding. Before that, however, problems in access, costs and teacher training must be solved. This revised version was published online in August 2006 with corrections to the Cover Date.  相似文献   

地理空间的数学定义及定位型地图符号的制约因素分析     

钟业勋 《武汉大学学报(信息科学版)》2004,29(1):29-33

给出了地理空间的数学定义 ,推导了制图区域、地图投影、制图物体及其在椭球面和地图平面上的定位等概念 ,揭示了同一平面位置上可以依制图目的的不同而分别表示多种事物的性质或量值的基本原理 ,阐释了对同一制图区域进行多专题制图的客观条件和物理基础。  相似文献   

Geographical knowledge and policy: the positive contribution of discourse studies   总被引：1，自引：0，他引：1  

Yvonne Rydin 《Area》2005,37(1):73-78

The 'discursive turn' has been blamed for a lack of engagement between geographers and policymakers. This paper argues that such a view is fundamentally flawed. It ignores the positive contribution that discourse analysis has made to policy studies and the particular role that geographers have played in developing such analyses. It is based on a misconceived view of the policy process and how knowledge can contribute to policy outcomes. A closer attention to policy discourses reveals exactly how knowledge is constructed within the policy process and can help identify how policy may be improved through discursive means.  相似文献   

贵州省六盘水市石漠化遥感-GIS评价     

张红玉  李武福  郭颖 《云南地理环境研究》2005,17(5):15-19

以六盘水市为研究区，以ETM遥感数据和1：25万的国家标准基础地理数据为主要数据源，辅助以地面样地调查数据，建立石漠化与诸因子相关关系模型，将诸因子转化为遥感定量指标，研究遥感专题信启，快速提取，形成RS、GIS集成的石漠化信息提取技术。通过以上技术处理，实现了六盘水市喀斯特地区的石漠化现状遥感—GIS快速调查评价，得到六盘水市石漠化信息地理数据库等数据，为政府部门实现宏观决策提供理论依据和科学数据。  相似文献