共查询到19条相似文献，搜索用时 131 毫秒
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结合三维建模和电子地图的基本理论,根据地质公园的特点,利用ERDAS实现大面积区域三维可视化,并结合3DS MAX丰富的建模技术及强大的动画制作功能,在地质景观演化方面做了初步探讨。采用“超地图”的形式来组织各种地图数据以及超媒体相关信息,从内容结构设计及特点进行论述,实现了伊通火山群的三维电子地图,展示出“伊通型火山”的特点。为科研、科普和旅游提供了方便、直观的信息表现形式,拓宽了电子地图的应用领域,同时也丰富了电子地图的研究内容。 相似文献
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基于GIS的网络电子地图系统开发与研究 总被引：3，自引：0，他引：3
随着Internet技术的发展和人们对地理信息系统（GIS）的需求,网络上空间数据的发布,已经成为GIS的发展趋势。网络电子地图随之应运而生。我们以ArcIMs9．0作为webMap服务器,MicrosoftⅡS作Web）服务平台,结合javaScript,XML对网络电子地图系统的开发进行了探讨和研究,以合肥工业大学校园为背景,完成了的网络电子地图的系统模型构架。系统的查询、浏览、空间分析等功能齐全,使用方便。系统模型可在相关地区移植,利于推广,避免重复开发。 相似文献
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遥感技术在城市电子地图基础数据生产项目中的应用 总被引：1，自引：1，他引：1
主要描述遥感技术在城市电子地图基础数据建设中的应用。介绍了城市电子地图特点及其规模选择，并着重介绍了在城市电子地图中应用的主要遥感信息源，以及在遥感技术手段的支持下，如何满足城市电子地图基础数据生产的需求。同时，还提供了建立城市电子地图基本数据产品的工作流程和技术方法。 相似文献
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随着计算机科学技术和地理信息系统以及全球卫星定位系统（ＧＰＳ）的发展,产生了一门新的应用领域———ＧＰＳ电子地图．根据电子地图的特点,介绍了自行开发设计的ＧＰＳ电子地图系统的结构、功能及实现方法． 相似文献
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GPS导航能够为用户提供比较精准而且速度较快的定位服务,如果用户想要获得更多更全面的地理信息服务（例如,明确公共服务设施位置、获得路况信息服务、规划路线图等）,则需要导航电子地图的数据支持。导航电子地图的应用研究是我国的测绘事业中非常活跃的分支领域之一,它的活跃和繁荣对于促进我国的测绘事业而言具有重要意义。导航电子地图中最优路径的应用研究非常受到人们的关注,在本文中,笔者主要探讨了导航电子地图中的最优路径控制问题。 相似文献
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基于SuperMap软件平台,综合多源数据,介绍了民政电子地图制作方法、流程及地图编制过程中注意的问题,并深入探讨了电子地图应用于合肥市民政系统提供面向社会公众的地名信息化服务的重要意义。 相似文献
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电子地图中的三维立体地图随着迅速发展的计算机技术和测绘技术,逐渐得到人们的青睐。三维立体地图就目前而言适合应用在表示空间现象的总体形态上,其中包括三维景观地图、虚拟仿真城市、三维地形图等。-而三维电子地图具有真实性、直观性、方位性及立体性等优点。文章详细地阐述了三维立体城市地图的制作过程。 相似文献
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实时水雨情监测WebGis业务系统实现 总被引：4，自引：2，他引：4
针对目前各级水利系统三防办实时水、雨情监测,以广州花都区三防办为例,给出了实时水、雨情数据的具体流转过程,并提出了一种Shape空间数据DBF文件与dBase 5数据库文件相互关联的方法,使遥测设备接收到的水雨情数据在W ebG is平台中电子地图相关监测点实时、动态反映,并且能够以曲线图等直观图形式表现出来,从而辅助三防办及相关领导进行正确、及时的决策。 相似文献
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中国古地理图研制发展的脉络与前景 总被引：2，自引：0，他引：2
早期的中国古地理图,是在地球大陆固定概念的基础上着重于海陆分布、形态、变化特征的描绘。后来注意了全球构造的“活动论”与历史演化的“阶段论”相结合,开始了多种类型图件的表达,再后通过板块构造、古地磁学资料的更多积累,预期下一代的中国古地理图将呈现各地质时期的古地理单元恢复到原始位置进行描绘的前景。从第四纪大冰期冰川作用的深入研究,使其极大影响下的各种古地理事件及古地理单元的形成、分布和变化得到深入的了解和更合理的解释,可编制出该时期新一代更符合实际的中国古地理图来。 相似文献
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Evaluating differences in spatial visual attention in wayfinding strategy when using 2D and 3D electronic maps 总被引：1，自引：0，他引：1
With the evolution of mapping technology, electronic maps are gradually evolving from traditional 2D formats, and increasingly using a 3D format to represent environmental features. However, these two types of spatial maps might produce different visual attention modes, leading to different spatial wayfinding (or searching) decisions. This study designs a search task for a spatial object to demonstrate whether different types of spatial maps indeed produce different visual attention and decision making. We use eye tracking technology to record the content of visual attention for 44 test subjects with normal eyesight when looking at 2D and 3D maps. The two types of maps have the same scope, but their contents differ in terms of composition, material, and visual observation angle. We use a t test statistical model to analyze differences in indices of eye movement, applying spatial autocorrelation to analyze the aggregation of fixation points and the strength of aggregation. The results show that aside from seek time, there are significant differences between 2D and 3D electronic maps in terms of fixation time and saccade amplitude. This study uses a spatial autocorrelation model to analyze the aggregation of the spatial distribution of fixation points. The results show that in the 2D electronic map the spatial clustering of fixation points occurs in a range of around 12° from the center, and is accompanied by a shorter viewing time and larger saccade amplitude. In the 3D electronic map, the spatial clustering of fixation points occurs in a range of around 9° from the center, and is accompanied by a longer viewing time and smaller saccadic amplitude. The two statistical tests shown above demonstrate that 2D and 3D electronic maps produce different viewing behaviors. The 2D electronic map is more likely to produce fast browsing behavior, which uses rapid eye movements to piece together preliminary information about the overall environment. This enables basic information about the environment to be obtained quickly, but at the cost of the level of detail of the information obtained. However, in the 3D electronic map, more focused browsing occurs. Longer fixations enable the user to gather detailed information from points of interest on the map, and thereby obtain more information about the environment (such as material, color, and depth) and determine the interaction between people and the environment. However, this mode requires a longer viewing time and greater use of directed attention, and therefore may not be conducive to use over a longer period of time. After summarizing the above research findings, the study suggests that future electronic maps can consider combining 2D and 3D modes to simultaneously display electronic map content. Such a mixed viewing mode can provide a more effective viewing interface for human–machine interaction in cyberspace. 相似文献
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由于计算机在地质研究中的大量运用,传统地质图件的数字化成为目前许多应用的主要 数据来源。作者在文章中主要讨论利用数字化仪输入地质图件的基本原理,数据转换以及坐标变换的核心技术和在Ｗｉｎｄｏｗｓ环境下,如何用Ｖｉｓｕａｌ Ｂａｓｉｃ６．０开发数字化仪通信程序。最后给出了一个简单的数字化仪通信实验程序。 相似文献
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成果地质资料汇交工作的探讨 总被引：1，自引：0，他引：1
本文主要是针对《成果地质资料电子文件汇交格式（试行）》在实际操作中遇到的问题,提出解决的对策。首先电子文档汇交人必须具有高度的责任心,仔细了解地质资料汇交规章制度,熟悉电子文档制作技术,其次要做好地质报告的文、图、表等数据库资料的检查、验收、存储及复查。这样做才能做到层层把关,保证电子文档汇交的质量,能更好的实现地质资料社会化服务。 相似文献
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Extraction and accuracy assessment of high-resolution DEM and derived orthoimages from ALOS-PRISM data over Sahel-Doukkala (Morocco) 总被引：1，自引：1，他引：0
Adnane Habib Nadia Akdim Fatima-ezzahra El Ghandour Kamal Labbassi Kourosh Khoshelham Massimo Menenti 《Earth Science Informatics》2017,10(2):197-217
In Sahel-Doukkala, which is characterized by lands of a relatively low relief, global DEMs and DEMs generated from digitizing topographic maps, have been the primary source of several multidisciplinary researches. Although these products present a great value of the conducted research, the level of the given accuracy is not sufficient enough for detailed geospatial analysis. These requirements led us to generate a high-resolution DEM as an alternative of available global DEMs or/and DEMs generated from digitizing topographic maps. In this study, we present a workflow to extract high-resolution DEM at 5 m resolution and derived orthoimages from ALOS-PRISM data over Sahel-Doukkala, through photogrammetric techniques, using a variation of GCPs obtained from topographic maps at scale 1:25,000. The accuracy of the generated products is reported according to NSSDA standards. Using ten GCPs, a PRISM-DEM with 3.88 m vertical accuracy and 11.60 m horizontal accuracy, both at 95% confidence level is obtained. This DEM will serve as base dataset for further detailed geospatial analysis and mapping applications in order to identify the relationship between surface parameters and groundwater, and also to assess and understand all factors influencing the development of karst landscapes and consequently subsurface stability in the investigated area. 相似文献
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Total field magnetic data were collected over the Krishna-Godavari basin covering 20, 000 sq.km with an average spacing of 8.5 km. This was mainly to study the long wavelength features related with the deep structures. Aeromagnetic map of the region compared well with the ground maps. The anomaly maps show a combination of NE-SW, NS/NNE-SSW and NW-SE trends. The anomalies of ground data are transformed to isolate the sources at different depths. The second vertical derivative and downward continuation maps bring out clearly the NE-SW and NS/NNE-SSW trends related to the coastal basin and Eastern Ghats implying that they are shallow. These are probably superposed on much deeper NW-SE trending structural features of Pre-Gondwana breakup as evidenced in the Horizontal Gradient of Pseudogravity and upward continuation maps. From the offshore magnetic data it appears that these trends extend up to the Ocean Continent Boundary. It is inferred that the deeper features are associated with rifting of Dharwar and Bastar cratons within the Indian plate, prior to the rifting of India from Gondwanaland. The superposed horst and graben structures are related to the formation of the pull-apart Krishna-Godavari basin as a result of rifting and drifting of India from Gondwanaland. These two structural features are associated with two different tectonic events. 相似文献
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信息技术在野外地质数据采集中的应用现状综述 总被引：1，自引：0，他引：1
掌上计算机、全球定位系统GPS和手写输入技术的发展与综合应用 ,基本解决了野外地质数据采集信息化的关键技术问题。野外电子记录本已在发达国家野外数据采集中使用 ,它与室内工作的紧密结合及其标准化工作 ,对提高工作效率与质量有着重要的作用。 相似文献
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A number of aspects related to vulnerability maps are discussed: the vulnerability concept, mapping purposes, possible users, and applicability of vulnerability maps. Problems associated with general-type vulnerability mapping, including large-scale maps, universal pollutant, and universal pollution scenario are also discussed. An alternative approach to vulnerability assessment—specific vulnerability mapping for limited areas, specific pollutant, and predefined pollution scenario—is suggested. A simplification of the vulnerability concept is proposed in order to make vulnerability maps more objective and by this means more comparable. An extension of the vulnerability concept to the rest of the hydrogeologicar cycle (lakes, rivers, and the sea) is proposed. Some recommendations regarding future activities are given. 相似文献