移动地图变比例尺表达方法研究

发布时间：2018-05-08 03:39

本文选题：移动地图 + 变比例尺　；参考：《郑州大学》2013年硕士论文

【摘要】：当今移动信息设备和无线网络技术的飞速发展促进了移动GIS服务的广泛应用。移动地图作为移动GIS的重要表现方式,也被人们熟悉和使用并逐渐成为现代社会中,辅助人们进行空间认知的重要工具。但是由于移动信息设备不同于以往的数字设备,存在显示区域相对较小,操作相对不便的特点。移动地图使用传统数字地图的表达方式可能造成地图信息不平衡,易读性较低的问题,不能完全满足用户对移动地图的需求。因此,寻找更为适合移动地图的表达方式是移动地图发展的当务之急。本文提出了一种自适应的移动地图变比例尺表达方法,希望能达到提高移动地图信息载负量,平衡移动地图空间信息分布,提高移动地图易读性的目的。本文首先介绍了移动地图技术的发展,并着重讨论了移动自适应地图的基本特征和关键技术,提出了移动地图表达的关键问题在于移动设备显示区域有限与用户渴望获取更多空间信息的矛盾,移动设备操作不便与实际空间地物分布不均的矛盾。之后说明了变比例尺地图充分利用地图空间的特性可以作为解决移动地图表达问题的方法之一,并重点对不同介质的变比例尺地图表达模型的原理、算法、显示效果及其优势进行了分析和比较,作为选择移动设备合适的变比例尺表达模型的参考。自适应移动地图可以有效的减少用户对移动地图的操作,而变比例尺地图表达可以更加充分的利用移动设备的显示区域,有效提高移动地图的信息载负量。本文将这两种方法结合,提出了自适应移动地图变比例尺表达方法。使用拓扑关系代替度量关系确定焦点区域的方法,有效降低了因空间地物分布不均导致地图信息不平衡情况的发生；针对移动设备计算能力相对较低的特点,选择了适合移动设备的变比例尺表达模型；引入形状测度模型,用于计算用户邻近区域的圆形率,并通过圆形率数值选择变比例尺模型,降低了变比例尺模型引起的地物畸变程度。地图载负量是评价地图制图的一个重要指标。本文在原有的纸质地图载负量计算方法之上,通过分析地图载负量的计算原理,结合移动地图和变比例尺地图的特有性质,对原有计算公式及方法进行了改进,提出了移动变比例尺地图载负量的计算方法。通过实验,将移动变比例尺地图载负量与传统移动地图载负量进行比较,得到移动变比例尺地图在保证其核心部分显示细节不丢失的情况下,信息载负量优于传统移动地图的结论。最后,利用Windows Mobile6.0SDK和ArcGIS Sever Mobile SDK,使用Visual Studio2005C#在移动设备模拟器上进行了实验系统开发,并使用郑州市道路网和水系数据进行了系统测试和检验,取得了较好的效果。移动地图变比例尺表达方法可以在清晰表达用户周围地理细节的同时兼顾展现边缘区域更多的空间信息,并且有效减少了用户的操作次数。为移动地图表达提供了一种新的思路和新的研究方向。
[Abstract]:The rapid development of mobile information equipment and wireless network technology has promoted the wide application of mobile GIS services. As an important expression of mobile GIS, mobile maps are also familiar and used by people and gradually become important tools to assist people to carry out spatial cognition in modern society. However, mobile information equipment is different from the past. The digital equipment has the characteristics that the display area is relatively small and the operation is relatively inconvenient. The use of the traditional digital map expression in the mobile map may cause the imbalance of the map information and the low readability, and can not fully satisfy the user's demand for the mobile map. Therefore, the way to find more suitable for mobile maps is to move. In this paper, an adaptive method of variable scale expression for mobile map is proposed, which can improve the load of mobile map information, balance the distribution of spatial information of mobile map, and improve the readability of mobile map.
This paper first introduces the development of mobile map technology, and focuses on the basic features and key technologies of mobile adaptive map, and puts forward that the key problem of mobile map expression is the contradiction between the limited display area of mobile devices and the desire to obtain more spatial information, and the inconvenient operation of moving equipment and the distribution of real space objects. Then it shows that the variable scale map makes full use of the characteristics of map space as one of the methods to solve the problem of moving map expression, and focuses on the analysis and comparison of the principle, algorithm, display effect and advantages of variable scale map expression model of different media, as the appropriate change of mobile devices. The reference of the scale expression model.
The adaptive mobile map can effectively reduce the operation of the mobile map, and the change of the scale map can make full use of the display area of the mobile device and effectively improve the load of the mobile map. This paper combines these two methods, and puts forward a variable scale expression method of adaptive mobile map. The method of determining the focus area instead of the measurement relationship effectively reduces the uneven distribution of the map information because of the uneven distribution of the space and ground objects. In view of the relatively low computing power of the mobile devices, the variable scale expression model suitable for mobile devices is selected and the shape measure model is introduced to calculate the adjacent area of the user. The circular ratio of the domain is selected, and the scale model is selected by the circular ratio value, which reduces the distortion degree of the terrain caused by the variable scale model.
In this paper, on the basis of the calculation method of load carrying capacity of map and the characteristic of mobile map and variable scale map, the original calculation formula and method are improved on the basis of the original load load calculation method of paper map. By comparing the load load of the mobile variable scale map and the traditional mobile map load, the results of the mobile variable scale map are better than the traditional mobile map in the case of ensuring that the details of the core part are not lost.
Finally, using Windows Mobile6.0SDK and ArcGIS Sever Mobile SDK, the experiment system is developed on the mobile device simulator using Visual Studio2005C#, and the system test and test are carried out using the road network and water system data in Zhengzhou, and the good results have been obtained.
The variable scale expression method of mobile map can clearly express the details around the user and show more spatial information in the edge area, and effectively reduce the number of operation of the user. It provides a new way of thinking and new research direction for the movement map expression.

【学位授予单位】：郑州大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：P208

【参考文献】