Development of Automatic System for Producing High-resolution DEM from Topographic Map and its Application

地形图高分辨率DEM自动生成系统的研制及其应用

基本信息

批准号：
18500070
负责人：
WATANABE Takashi
金额：
$ 2.5万
依托单位：
Iwate University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2006
资助国家：
日本
起止时间：
2006 至 2007
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-18500070/
关键词：
digital elevation model DEM topographic map contour monotone interpolation image processing GIS 補間

项目摘要

We have pushed our work in this project to develop an automatic system producing high-resolutional digital elevation models (DEM) from topographic contour maps on sale, as follows: (1) testing the system to many real topographic maps, we improve performance of the adopted algorithms; (2) we integrate the system to be a total and user-friendly one; (3) we provide high-resolutional DEMs and develop tools to extract effectively the topographic features. For the first, we developed the two post-processing methods on DEMs, the extended Grimson's regularization method and the restricted-smoothing method, that can remove unnatural configurations on DEMs such as sharp drops in level, bumps and hollows. From the evaluation experiments, we found that they are effective. Also, we discussed the adjustment problem of topographic maps that there may be a little different in their borders and it is necessary to adjust their contours to make a unified DEM. For the second, we have continued implementation of the system using graphic-user-interface (GUI) techniques to realize a user-friendly one. Also, we are making an effort that our system may be integrated to be a total and user-friendly one. For the third, we provided high-resolution DEMs and develop the methods to extract effectively the topographic features. Now we can say that the core of our system producing high-resolution DEMs from topographic contour maps is accomplished. We will continue our works to enrich the system and apply it to practical problems of topographic information processing in GIS.

我们已经推动了该项目的工作，以开发自动系统，从而从销售地形图形图中产生高分辨率数字高程模型（DEM），如下所示：（1）将系统测试到许多真实的地形图中，我们提高了采用算法的性能；（2）我们将系统集成为完全且用户友好的系统；（3）我们提供高分辨率的DEM并开发工具来有效提取地形特征。首先，我们开发了DEMS上的两种后处理方法，即扩展的Grimson的正则化方法和受限平滑的方法，可以消除DEM上的不自然配置，例如急剧下降，凸起和空心。从评估实验中，我们发现它们是有效的。另外，我们讨论了地形图的调整问题，即它们的边界可能有些不同，有必要调整其轮廓以制造统一的DEM。第二次，我们继续使用Graphic-user-Interface（GUI）技术实现系统以实现一种用户友好的方法。另外，我们正在努力，我们的系统可能会集成为完全且用户友好的系统。对于第三次，我们提供了高分辨率的DEM，并开发了有效提取地形特征的方法。现在，我们可以说，从地形轮廓图产生高分辨率DEM的系统的核心已完成。我们将继续我们的工作以丰富系统，并将其应用于GIS中地形信息处理的实际问题。