地图数据结构的简要分析     

王饰欣  胡静波  王莉莉 《测绘与空间地理信息》2014,(10):212-213

各种地图要素转换成计算机的可读形式称为地图数据,地图数据结构指构成地图内容诸要素的数据集之间相互关系和数据记录的编排组织方式;它也是电脑制图的核心内容,是必须理解和掌握的。本文简要介绍地图数据结构的主要类型,即矢量数据结构和栅格数据结构,以及二者的区别与联系。  相似文献   

基于ArcGIS的乡镇快递公司配送中心的选址研究     

曹一丁  霍新琴  周志全 《测绘与空间地理信息》2014,(12)

随着乡镇经济的发展,乡镇快递公司的配送中心选址研究成为了前沿课题,深入研究乡镇地区配送中心的选址问题具有重要的应用价值.近些年,地理信息技术在很多领域有了广泛应用,尤其是地理信息系统的空间分析,为城市规划提供了有力的处理手段.缓冲区分析与叠置分析是地理信息系统进行空间分析常用的空间操作.本文着重介绍了基于ArcGIS软件的缓冲区分析和叠置分析,利用此软件的缓冲区分析功能建立某乡镇区域的道路网与各村庄的缓冲区,随后将以上得到的各缓冲区图层进行叠置分析,将快递公司配送中心选址的最佳区域筛选出来.  相似文献   

虚拟战场环境中三维非规则军标技术研究     

张宗佩  万刚  李锋  刘婧  王龙 《测绘与空间地理信息》2014,(10):22-25

采用贝塞尔曲线插值的方法实现了非规则军标的绘制,并结合虚拟三维战场环境特点,通过Overlay技术和颜色融合技术设计并实现了遮盖式和挤出式两种配置方式,为在三维虚拟战场环境中表现非规则军标提供有效的配置方法。实验结果证明,采用本文生成和配置技术生成非规则军标速度快,能很好地满足军事应用需求。  相似文献   

4D data fusion technique in urban waterlog-draining decision support system     

LI Jun 《地球空间信息科学学报》2000,3(3):42-46

This paper studies urban waterlog-draining decision support system based on the 4D data fusion technique.4D data includes DEM,DOQ,DLG and DRG.It supplies entire databases for waterlog forecast and analysis together with non-spatial fundamental database.Data composition and reasoning are two key steps of 4D data fusion.Finally,this paper gives a real case: Ezhou Waterlog-Draining Decision Support System (EWDSS) with two application models,i.e.,DEM application model,water generating and draining model.  相似文献   

An integrated data model in three dimensional GIS   总被引：2，自引：0，他引：2  

GONG Jianya XIA Zongguo Professor  National Laboratory for Information Engineering in Surveying  Mapping  Remote Sensing  WTUSM  Luoyu Road  Wuhan  China 《地球空间信息科学学报》1999,2(1):1-8

The current GIS can only deal with 2-D or 2.5-D information on the earth surface. A new 3-D data structure and data model need to be designed for the 3-D GIS. This paper analyzes diverse 3-D spatial phenomena from mine to geology and their complicated relations, and proposes several new kinds of spatial objects including cross-section, column body and digital surface model to represent some special spatial phenomena like tunnels and irregular surfaces of an ore body. An integrated data structure including vector, raster and object-oriented data models is used to represent various 3-D spatial objects and their relations. The integrated data structure and object-oriented data model can be used as bases to design and realize a 3-D geographic information system.  相似文献   

处理大型数据时内存不足的解决办法     

刘洪  冷德惠 《物探化探计算技术》1999,21(2):182-185,192

本文给出了处理大型数据时内存不足的五种解决方法：即：（１）尽可能空闲基本内存;（２）利用覆盖技术;（３）利用虚拟存储技术;（４）利用一些编译程度;（５）利用ｈｕｇｅ指针。  相似文献   

一种基于迁移学习的栅格型图表自动分类方法     

韩冰  王光霞  陈令羽  王慧芳  张蓝天 《测绘科学技术学报》2021,38(1):75-82

图表自动分类是实现图表内容解译及信息提取的前提.基于Inception V3模型,采用迁移学习的方法,对图表自动分类方法进行了研究,提出了对5类栅格图表进行自动分类的模型.通过与传统的图表自动分类方法的对比试验,测试了在不同学习率参数下模型的分类效果,给出了针对结构化特征的指数衰减学习率的数学表达式.结果表明:采用迁移...  相似文献   

顾及栅格空间拓扑关系的地表覆盖时空目标不一致性探测方法     

康顺  陈军  彭舒 《测绘学报》2019,48(6):767-779

地表覆盖与更新是地理国情监测、环境变化评估、生态系统保护等不可或缺的基础地理信息。遥感制图技术已成为地表覆盖信息提取的重要手段,但因地物光谱、纹理及时相等特征复杂性,地表覆盖更新数据往往存在错分、漏分,从而导致地表覆盖时空目标不一致。现有地表覆盖更新数据不一致性探测主要以人工检查为主、部分自动化为辅的方式,生产实践中需要大量的作业人员与时间,缺乏行之有效的不一致性自动化探测工具。本文研究分析了栅格地表覆盖更新数据不一致性检查面临的挑战,提出了基于复合逻辑量词的栅格空间拓扑关系计算方法、基于置信区间的更新期地表覆盖错分目标初判规则构建,以及利用空间约束多重匹配的更新期错分目标后验判断,形成了“关系-规则-判断”的地表覆盖时空目标不一致性探测体系。试验以山东临朐、垦利GlobeLand30数据为研究对象,经与统计一致性检核方法对比分析、参照真实地表影像数据,实现了地表覆盖时空目标不一致性探测与有效性检验,验证了探测方法可行性。  相似文献   

A comparative predictive analysis of weighted overlay,weighted sum and fuzzy logic for mineral prospectivity mapping of precious and base metal mineralizations at north-east of Gümüşhane city,NE Turkey     

Önder Kayadibi  Doğan Aydal 《国际地球制图》2019,34(5):539-559

The study area located south of the Eastern Pontide metallogenic belt (NE Turkey) has an important potential for valuable and base metallic minerals. Geological, tectonic, geochemical, hydrothermal alteration, mineralogical and fluid inclusion characteristics of ore formations in the region have been studied in detail. The purpose of this study is to combine and analyse the acquired spatial data layers in a geographic information system (GIS) environment using knowledge-driven approaches and to identify prospective areas in terms of mineralization. Moreover, evaluating the performance of different knowledge-driven mineral probability modelling results comparatively and quantitatively constitutes the other goal of the study. As a result, in addition to the known mineralization locations, a number of new prospective and favourable areas have been identified for future detailed studies. In addition, it has been found that the mineral predictive map generated using fuzzy logic-OR method produces the best and successful results compared to others.  相似文献