基于二面投影原理的单张像片的连续制图

考虑利用卫星像片进行制图问题，对于需要两张或更多张卫片才能覆盖的地区进行连续制图时，需要研究多张卫片的图像镶嵌问题，利用二面投影原理对卫片原的镶嵌问题进行了研究，主要考虑两张相邻卫片的几何配准问题。     

NOAA相邻卫片的自动镶嵌

图象镶嵌是个麻烦而且费时的工作。本文通过分析相邻图象的关系，给出了图象自动镶嵌的算法，即通过寻找相邻图象象素最小偏差平方和出现的位置来自动确定镶嵌需要偏移的行列数，这种方法容易实现。通过对NOAA图象镶嵌的试验，表明该算法是有效的。     

生产数字正射影像图(DOM)的若干技术问题探讨

讨论了常用的几种制作数字正射影像图(DOM)国产软件的特点,结合生产分析,指出了制作数字正射影像图的技术核心,也指出了生产中的一些不足之处,以期对解决DOM生产过程中出现的常见“毛病”做出改进。     

基于网格模板的最小欧式距离准则图像自动拼接技术

提出一种结合网格模板和最小欧式距离准则的图像自动拼接方法。方法选取图像重叠部分作为处理对象，运用边缘检测自动获取基准图像特征块，并提出基于网格模板的最小欧式距离准则用于计算匹配点，最后使用图像融合技术消除接缝。应用证明该方法拼接准确快速，实现简单，适合大部分图像拼接应用的需要。     

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北京一号小卫星图像镶嵌处理技术研究

介绍北京一号小卫星数据的特点及应用情况,分析了卫星图像镶嵌处理技术流程,对其中的技术难点,如去条带处理、几何校正、图像拼接及色彩平衡等进行了重点探讨并提出解决办法。利用北京一号小卫星数据将两幅多光谱影像进行了镶嵌处理,得到了一幅覆盖整个研究区的新影像,镶嵌影像色彩丰富、层次感好、信息量大。     

利用WorldView-2卫星影像数据生产高分辨率多光谱技术正射影像方法

阐述了在工作实践中利用WorldView-2卫星影像制作正射影像的基本工艺流程,着重分析卫片的融合、校正、影像镶嵌等处理环节中的方法,坐标的建立及转换,数据格式的转换等,以及此过程中遇到的问题,及在各个环节中的质量控制。     

多源遥感影像管理与服务平台的设计与实现

针对遥感影像管理与共享服务,在分析不同来源遥感影像数据资源特点基础上,提出了适合多源、海量遥感影像数据管理的"文件+数据库"的存储和管理方式,采用镶嵌数据集进行遥感影像数据管理,并进行服务发布;同时提出了多源遥感影像管理与服务平台的总体构架体系,包括海量遥感影像管理平台和多源遥感影像网络化服务平台的设计与实现。     

Linking pesticides and human health: A geographic information system (GIS) and Landsat remote sensing method to estimate agricultural pesticide exposure

Accurate pesticide exposure estimation is integral to epidemiologic studies elucidating the role of pesticides in human health. Humans can be exposed to pesticides via residential proximity to agricultural pesticide applications (drift). We present an improved geographic information system (GIS) and remote sensing method, the Landsat method, to estimate agricultural pesticide exposure through matching pesticide applications to crops classified from temporally concurrent Landsat satellite remote sensing images in California. The image classification method utilizes Normalized Difference Vegetation Index (NDVI) values in a combined maximum likelihood classification and per-field (using segments) approach. Pesticide exposure is estimated according to pesticide-treated crop fields intersecting 500 m buffers around geocoded locations (e.g., residences) in a GIS. Study results demonstrate that the Landsat method can improve GIS-based pesticide exposure estimation by matching more pesticide applications to crops (especially temporary crops) classified using temporally concurrent Landsat images compared to the standard method that relies on infrequently updated land use survey (LUS) crop data. The Landsat method can be used in epidemiologic studies to reconstruct past individual-level exposure to specific pesticides according to where individuals are located.     

Evolution and Morphodynamics of a Prograded Beach‐Ridge Foreland,Northern Baffin Island,Canadian Arctic Archipelago

Landward retreat (marine transgression) is a common response of coastal systems to rising relative sea level. However, given sufficient sediment supply, the coast may advance seaward. The latter response of gravel barriers has been recorded in parts of southeastern and northwestern Canada, where seaward‐rising sets of beach ridges are observed in areas of Holocene RSL rise. Cape Charles Yorke, northern Baffin Island, is a 5 km long gravel foreland characterized by seaward‐rising beach‐ridge crest elevations. The prograded morphology of the Cape Charles Yorke foreland is a prime example of coastal response to a combination of rising RSL and abundant sediment supply, an unusual and little‐documented pattern in the Canadian Arctic. The main gravel supply to Cape Charles Yorke is likely from eroding bedrock and raised marine deposits southwest of the foreland. Although not the dominant sediment source, the Cape Charles Yorke delta contributed to the formation of the foreland by sheltering it from easterly storm waves and providing an anchor point for the prograding ridges. The truncation of relict ridges by the modern shoreline suggests a recent regime shift from continuous deposition to predominant erosion. The cause and timing of this shift are unknown but could result from a recent dwindling in sediment supply, increased accommodation space, increased wave energy, and/or an accelerated rise of relative sea level.