地理信息系统中的网络模型   总被引：2，自引：2，他引：0  

狄小春 《地理研究》1990,9(1):35-40

社会中的很多空间现象,如交通、信息交流和生活消费品的运输等都是线性的。在ARC INFO地理信息系统(GIS)中,这些线性现象经过组织和处理,能够建立成网络及其数据库。从而可用来解决资源的合理分配和流动、交通运输中的最佳路线选择等问题。  相似文献   

卫星数字图象处理与制图分析——以京津及邻区1:25万影象图的处理分析为例     

张晋  傅肃性  王恩尧 《地理研究》1987,6(2):14-20

利用计算机进行图象处理和彩色制印,编制了京津及邻区1:25万影象图。采用经数字处理的图象和制图分析等编改工艺,取得了高质量低成本的效果。  相似文献   

城市规划信息系统初探     

孙汉青  卢明山 《地理信息世界》2002,(4)

城市规划信息系统作为城市地理信息系统的一个重要的专题分支系统 ,是城市规划体系的基础和纽带。因此 ,通过研究城市规划信息系统的基础理论来指导城市规划信息系统的具体实践 ,进而实现城市可持续发展的战略 ,具有重要意义。  相似文献   

我院教师文献信息需求调查与分析     

纪驿桥  邓备  赵丽华 《成都信息工程学院学报》1997,(4)

作者对该院教师的文献信息使用及需求情况进行了９个方面的调查分析，其结果对学校教学科研的改革和深化具有现实的参考意义。  相似文献   

地理信息系统在国土资源调查中的应用     

左景勋 《河南国土资源》2001,(4)

目前地理信息系统的制图功能广泛应用于国土资源大调查中 ,作者结合自己的工作体会 ,介绍一下微机辅助制图的工作方法和步骤 :图层设置、矢量化、误差校正、图幅拼接、图幅整饰和图形输出  相似文献   

观驾山—黑岛一带信息量法找金研究     

简文星  吕贻峰  秦松贤  刘吉平 《国土资源》1996,(2)

本文以成矿地质模型为依据，对观驾山—黑山岛一带的化探、物探、遥感及地质等信息变量进行了详细的分析，选取了１０个信息变量２４个标志状态；在此基础上，运用信息量法对研究区内４５８个单元的信息量值进行计算，并由此确定了研究范围内的成矿远景区。事实表明，研究区信息量成矿预测是非常有效的  相似文献   

Theorizing the digital divide: Information and communication technology use frameworks among poor women using a telemedicine system     

Melissa R. Gilbert  Michele Masucci 《Geoforum》2008,39(2):912-925

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应用于砂岩型铀矿找矿的遥感-航测信息集成模型构建     

聂俊兵  周铭  谢迎春  李名松 《地质科技情报》2008,27(1):99-102,107

应用遥感-航测(航放和航磁)信息集成技术,针对砂岩型铀矿找矿的几个重要条件:如盆地内部构造、含矿目的层、水文条件和矿化条件,构建了构造、岩性、水文和矿化4种信息集成模型.将这4种信息集成模型应用于示范区,在已知的矿化地段得到的结果与实际勘探的成果符合较好,提高了预测的准确性.  相似文献   

A comparative analysis of pansharpening techniques on QuickBird and WorldView-3 images     

Snehmani  Ashwagosh Ganju  Satish Kumar  P. K. Srivastava  Hari Ram R P 《国际地球制图》2017,32(11):1268-1284

Nowadays, different image pansharpening methods are available, which combine the strengths of different satellite images that have different spectral and spatial resolutions. These different image fusion methods, however, add spectral and spatial distortions to the resultant images depending on the required context. Therefore, a careful selection of the fusion method is required. Simultaneously, it is also essential that the fusion technique should be efficient to cope with the large data. In this paper, we investigated how different pansharpening algorithms perform, when applied to very high-resolution WorldView-3 and QuickBird satellite images effectively and efficiently. We compared these 27 pansharpening techniques in terms of quantitative analysis, visual inspection and computational complexity, which has not previously been formally tested. In addition, 12 different image quality metrics available in literature are used for quantitative analysis purpose.  相似文献   

A new algorithm to find raster-based least-cost paths using cut and fill operations     

Jieun Baek 《International journal of geographical information science》2017,31(11):2234-2254

We developed a least-cost path analysis algorithm that satisfies a slope threshold condition in hilly terrain. The new algorithm uses an expanding moving-window to explore a combination of cells that satisfy an elevation threshold condition and then supplements this by executing cut and fill operations when there are obstacle cells between source and destination cells. Cut and fill factors regarding the difference in the actual elevation and revised elevation are considered and a least-cost path is analyzed after calculating the accumulated travel cost to the destination point. After applying the developed algorithm to synthetic and real-world data, the least accumulated travel cost from the source point can then be calculated for all cells on the raster surface by considering various slope thresholds, moving-window sizes and raster data resolutions. This algorithm can be implemented as a useful tool in GIS software as well as engineering design software utilized in the construction and mining industries.  相似文献