农村土地承包地块四至自动读取的研究

针对目前相关GIS软件未能较好地解决土地四至读取的问题,结合相关理论,提出了一种基于方位角来自动读取承包地块四至的方法,并基于Arc GIS Engine 10.2以及Microsoft Visual Studio 2010的开发环境,使用C#语言实现了该方法。实践证明,该方法在农村土地承包经营权确权登记工作中具有较好的效果,很大程度上提高了工作效率。     

农村房地一体确权登记发证有关问题的探讨

结合建立房地一体化不动产登记体系的要求,以及地籍调查、房产调查有关规范要求,围绕在地籍调查的基础上如何进行房屋等建筑物、构筑物的补充调查,如何形成房地一体的调查成果,为房地一体化不动产登记提供基础资料,进行技术探讨。     

Excel VBA在农村土地承包经营权确权登记数据处理中的应用

测绘和信息数字化是农村土地承包经营权确权登记项目的重要工作内容,本文通过Excel VBA编辑器创建"宏"功能进行程序编制,并结合工作中的农户基本信息处理为实例,给出了通过Excel VBA程序开发实现农村土地承包数据处理的快速方法。     

基于B样条的云图非刚性配准方法

针对气象卫星分时成像所获得的序列图像同时具有刚性及非刚性形变的特点,提出结合B样条的分级变换模型进行配准.该算法不但考虑到传感器位置变化引起的旋转和平移等整体刚性形变,而且还考虑云的扭曲所引起的局部非刚性形变.对于图像整体刚性形变采用仿射变换配准算法进行校正,使图像整体趋于一致;而云的局部扭曲等非刚性形变采用改进的基于...     

基于Matlab的三维数字地形模拟及空间分析

利用MATLAB强大的可视化能力及丰富的图像处理工具,以凤台县中心城区为例,实现三维地形模拟和空间分析,包括空间建模、图像配准、叠加影像、坡度坡向及剖面分析等.     

一种改进的点云数据配准方法

针对利用最近点迭代（ICP）算法进行点云数据配准时费时较多的问题,提出结合Butterworth高通滤波器和Sobel边缘检测算子首先对点云数据进行预处理,然后再用ICP算法进行点云配准,有效解决这一问题,加快配准速度,并在Matlab中编程实现该方法,具体实验结果证明该方法的有效性。     

基于三维激光扫描数据的实体构筑物三维建模

以高压输电铁塔为研究对象,以地面激光扫描系统TRIMBLE GX为例,探讨如何利用三维激光扫描仪获取空间数据,建立相应实体模型的技术方法,并对建模效果作了分析。     

Estimation of water clarity in Taihu Lake and surrounding rivers using Landsat imagery

In China, the increase in exogenous-source pollutants from rivers is one of the most important causes of lake eutrophication. The application of remote sensing technology to water quality monitoring of rivers connected to these lakes has special significance for lake management at regional scales. Many research studies have estimated water clarity using Landsat imagery. However, most of this work focused on lakes or reservoirs, for which abundant water-only pixels (i.e., pure pixels of water, PPW) were available. Few of these studies have addressed rivers, especially rivers with an average width less than 100 m. In our study, we sought to determine whether water clarity in the rivers connected to Taihu Lake could be estimated using Landsat imagery. We obtained 18 Enhanced Thematic Mapper Plus (ETM+) images from 2009 for 13 rivers ranging from an average of 37.3 to 173.6 m wide. Three field campaigns conducted in May 2009, September 2009, and January 2010 were used to obtain field measurements of Secchi disk depth (SDD). Our results suggested that the widely used model, a(TM1/TM3) + b(TM1) + c, was suitable for the estimation of SDD for Taihu Lake. The brightness of the panchromatic band of ETM+ showed significant correlations with TM1, TM3 and TM1/TM3 (p < 0.001). As a result, SDD in the lake could also be estimated using the Landsat panchromatic band. The multispectral image of ETM+ did not provide adequate PPW for estimation of water clarity in rivers. However, PPW derived from the panchromatic image captured about 93% of the variation in SDD, on average, for the every worst-case scenario in the 13 rivers. Using the PPW in rivers, a significant correlation was found between the brightness of the panchromatic image and SDD (R² = 0.64, p < 0.001). Our results demonstrate that the panchromatic image of Landsat, but not the multispectral image, can be used to estimate water clarity in rivers with an average width greater than 40 m in the Taihu basin.     

华北北部及东北地区地震空区和条带统计特征分析

对1970年以来华北北部及东北地区(37°-55°N,103°-135°E,除甘肃、宁夏和境外朝鲜)的36次Ms 5以上中强地震前空区和条带图像扫描分析,着重讨论研究区不同类型地震(大主震、中强主震和晚期强余震)与空区、条带关系,主震与空区、条带持续时间关系,主震与空区、条带空间尺度及围空、条带起算震级等统计关系,一定...     

PC-104 模块在水下原位化学分析仪器中的应用

使用PC-104 嵌入式平台作为控制模块开发了流动注射分析仪的控制和采集系统, 实现了载流驱动、进样控制及CCD(charge coupled device)光谱数据采集等复杂功能。结果表明: PC-104 模块在复杂控制和海量数据采集方面具有很好的实用性, 能大大缩短开发周期, 为结构复杂的水下原位化学分析仪的开发提供良好的控制采集平台。