基于UML的地质数据库设计方法的研究     

唐菡檐  戴爱德 《国土资源信息化》2008,(2):19-22

为了存储和管理复杂的地质数据需要一个合理有效的数据模型,以确保数据库中的所有数据时象得到精确和完整的表达。本文讨论了用UML的面向对象的方法来设计,给出了基于GeoDatabase模型建立地质数据库的具体过程。  相似文献   

三峡水库建设前后10年库区景观空间格局动态变化研究——以重庆开县为例   总被引：2，自引：1，他引：1  

邵怀勇  仙巍  杨武年  周万村 《测绘科学》2008,33(6):176-178

在遥感和地理信息系统技术的支持下,以1992年和2002年TM图像为基础,采用斑块密度、斑块平均面积、景观形状指数、景观分离度指数、景观多样性指数、景观优势度指数、景观相对聚集度指数深入而全面地研究了三峡工程建设前后十年重庆开县景观空间格局的动态变化,本研究的开展旨在为库区生态环境保护提供科学依据。研究结果表明,十年间研究区景观空间格局发生了明显变化,草地、未利用地、旱地、果园和水田面积净减,森林、建设用地、灌木林和水域面积增加,退耕还林已初见成效。  相似文献   

土地更新调查成果与二次调查数据衔接问题的探讨   总被引：2，自引：0，他引：2  

黄承忠  莫昭安  梁凉 《地理空间信息》2008,6(5)

结合广西第二次土地调查工作实际,论述了在调查工作中对原土地更新调查成果的利用,对需补充、完善的调查内容逐一进行了分析和阐述,并对如何处理两次调查数据衔接中存在的问题提出了一些建议和看法。  相似文献   

福卫2号卫星影像数据处理方法研究   总被引：1，自引：0，他引：1  

温秀萍 《地理空间信息》2008,6(5):36-39

对福卫2号卫星数据处理方法进行了研究,采用了高精度的卫星轨道模型和DEM进行正射精纠正;并对影像融合进行了多种方法实验,从光谱质量和空间信息角度对融合方法的结果进行了比较分析,得到适合福卫2号影像的融合方法,可为福卫卫星处理提供技术参考。  相似文献   

城市形象资源和地域文化传统特色研究     

魏晗 《中国勘察设计》2008,(3):77-79

城市是人类的一种社会组织结构形式,与其他任何组织形式一样,城市的发展也需要核心竞争力,核心竞争力依赖于城市核心资源系统的开发和创造。通过城市形象的塑造再创城市新型的核心资源,这已经是一个既成事实,城市形象可以在更高层次保护城市传统资源要素,使其发挥更大的作用。  相似文献   

The Application of RS and GIS to the the Updating Land Use Survey     

LU Yan  YANG Wu-nian 《四川地质学报》2008,28(3)

  相似文献   

Automated Kerogen Classification in Microscope Images of Dispersed Kerogen Preparation     

L. I. Kuncheva  J. J. Charles  N. Miles  A. Collins  B. Wells  I. S. Lim 《Mathematical Geosciences》2008,40(6):639-652

We develop the classification part of a system that analyses transmitted light microscope images of dispersed kerogen preparation. The system automatically extracts kerogen pieces from the image and labels each piece as either inertinite or vitrinite. The image pre-processing analysis consists of background removal, identification of kerogen material, object segmentation, object extraction (individual images of pieces of kerogen) and feature calculation for each object. An expert palynologist was asked to label the objects into categories inertinite and vitrinite, which provided the ground truth for the classification experiment. Ten state-of-the-art classifiers and classifier ensembles were compared: Naïve Bayes, decision tree, nearest neighbour, the logistic classifier, multilayered perceptron (MLP), support vector machines (SVM), AdaBoost, Bagging, LogitBoost and Random Forest. The logistic classifier was singled out as the most accurate classifier, with an accuracy greater than 90. Using a 10 times 10-fold cross-validation provided within the Weka software, we found that the logistic classifier was significantly better than five classifiers (p<0.05) and indistinguishable from the other four classifiers. The initial set of 32 features was subsequently reduced to 6 features without compromising the classification accuracy. A further evaluation of the system alerted us to the possible sensitivity of the classification to the ground truth that might vary from one human expert to another. The analysis also revealed that the logistic classifier made most of the correct classifications with a high certainty.  相似文献   

浅论军用土地统计计算机应用系统设计方法问题     

张笑星 《测绘学院学报》1993,(1)

本文在解放军土地管理局研制的“军用土地管理信息系统”的基础上,从系统设计和应用的角度出发,明确了系统应包括的基本功能,提出了改进和完善系统的方法。  相似文献   

雾灵山森林公园旅游形象设计     

秦安臣葛静茹  赵雄伟冯学权 《山地学报》2006,24(B10):338-342

引入反馈调节设计理念，构建了旅游形象设计体系；运用该体系对雾灵山森林公园的旅游形象进行了多方案设计，拟在广泛征询意见的基础上最终裁定该公园的旅游形象方案。  相似文献   

A Comparison of Sediment Varves (1950–2003 AD) in Two Adjacent Lakes in Northern Sweden     

V. Gälman  G. Petterson  I. Renberg 《Journal of Paleolimnology》2006,35(4):837-853

Koltjärnen and Nylandssjön are two closely situated lakes (<2 km apart) in northern Sweden. During the past century, distinct varved sediments have formed in these lakes. Nylandssjön has two varved, deep basins. Since lake and catchment characteristics superficially appear very similar for the two lakes and they are exposed to the same climate, one would expect the sediment varves to be similar. This investigation compares the varves in the two deep basins of Nylandssjön, and in the two lakes. The comparison of basins of Nylandssjön shows that varve thickness, water content and annual accumulation rates of organic matter and nitrogen are correlated for the period (1970–2003). The grey-scale curves are only clearly similar in about 50% of the varves. In the between-lake comparison varve thickness, water content and annual accumulation rates of organic matter and nitrogen are correlated for the period (1950–1996). However, the annual accumulation rates of dry mass, minerogenic matter and biogenic silica differ between the lakes, as well as within-varve successions in grey-scale. A general explanation to the differences is that the prerequisites for varve formation are not totally similar because of differences in catchment size, catchment- to-lake material fluxes, lake productivity and land-use influence. This study illustrates the complex relationships that exist between a lake, its catchment, in-lake productivity and formation of sediment varves. As a consequence, we must not apply a too simplistic view of the potential of varves as past climatic indicators, especially if the lakes are affected by land-use.  相似文献