山东埠后古火山机构显微构造研究     

黄洁真  刘辅臣 《地球科学》1985,(4)

埠后古火山机构由早白垩世陆相火山岩和次火山岩组成,铅、锌、铜、硫矿与后者有关。为了圈定火山通道的大致位置,在熔岩中采制定向切片,进行显微构造分析。通过变形、压密、阻挡、涡流等显微构造标志确定流动方位;利用长条状晶体的长轴方向确定流动线理。根据流动方位和流动线理圈出古火山口位置,进而指出在环火山颈的大断裂一侧,可能具区域找矿前景。  相似文献   

罗德里格矩阵在共线方程严密解法中的应用   总被引：1，自引：1，他引：1  

张森林 《武汉大学学报(信息科学版)》1987,(1)

在共线方程严密解法中,人们习用的是以方位元素X_s,Y_s,Z_s,φ,ω,κ为未知数的严密公式。本文则以罗德里格旋转矩阵的三个独立元素b,a,c取代角方位元素φ,ω,κ,并推导了相应的误差方程式。理论表明,新方法在组成旋转矩阵和计算误差方程系数中只需作加、减、乘、除等运算而不需解求三角函数,因而节省了计算工作量。  相似文献   

单站点无地面控制摄影机自检校     

袁修孝  朱宜萱 《武汉大学学报(信息科学版)》1987,(4)

“单站点无地面控制摄影机自检校”是一种利用纯摄影测量信息检校摄影机的方法。本文由共线条件方程出发导出了顾及到摄影机旋转中心与其摄影中心不一致时正直摄影象片与倾斜摄影象片同名象点坐标的几何关系式及线性化的误差方程式。编制了适用于VAX-11/750计算机使用的FORTRAN程序,并给出了用模拟数据和实际数据的计算结果。  相似文献   

贵州省三都县火烧寨锑-金矿地球化学特征及找矿方向     

向洪流 《矿产与地质》2007,21(5):542-545

贵州省三都县火烧寨锑-金矿区位于贵州“三丹成矿带”上，该带已发现许多大中型矿床，如丹寨大型金汞矿、三都苗龙金矿、都匀牛角塘中型铅锌矿床等。该带延绵近两百公里，民采盛行，矿点星罗棋布。根据该区水系沉积物及次生晕等锑-金成矿元素地球化学特征，在火烧寨矿区采用地质填图、辅以槽井探等浅部工程综合找矿手段，初步查明了该矿区的基本地质、构造及控矿特征以及矿体的产出形态，这对进一步的找矿工作起到一定的指导作用。  相似文献   

青海省斑岩铜矿地质特征及找矿方向探讨     

张梅芬  刘建华  肖文进  杨自安 《矿产与地质》2007,21(4):440-444

以纳日贡玛斑岩型钼铜矿床为例,对青海省斑岩铜矿产出的地质构造环境、地质特征、成矿地质条件、含矿建造等条件进行了综合分析。在此基础上,对本省斑岩铜矿的找矿方向进行了初步探讨,提出了斑岩型铜矿床的区域构造-岩浆岩带、区域地球物理、地球化学、围岩蚀变等找矿标志,划分出有远景的五大斑岩型铜矿成矿带。  相似文献   

地面起伏对成像及雷达景象匹配的影响   总被引：5，自引：0，他引：5  

叶勤  李启炎 《测绘学报》2002,31(Z1):50-55

景象匹配是飞行器导航与定位的一种重要手段,其中的雷达图像匹配由于具有全天候的特征而受到人们的重视.在分析了实时雷达图像成像方式的基础上,具体分析了地面高程起伏对雷达图像构像的影响,并进一步推导出在实时雷达图像上,图像像点位移与地面高程起伏的具体关系;以及为了保证一定的匹配定位精度,对于实飞地区地面起伏的定量要求.同时还对导航定位匹配所用的参考基准图受地面高程起伏的影响情况进行了定量的分析,并对理论情况和实际图像进行了计算分析与比较,最后得出在给定匹配精度的情况下,生成参考图时对成像区域内点之间的高差限制要求.  相似文献   

浅析解析测图仪相对定向的不定性     

施健 《测绘与空间地理信息》2002,25(1):23-24

通过长期的生产实践提出了相对定向不定性的问题,从相对定向的数学关系着手,列出解求相对定向元素的方程组,分析了产生相对定向不定性的原因,提出了相对定向的结果必须是模拟显示结果与数字显示结果的统一.  相似文献   

Fourcade: the Centenary of a Stereoscopic Method of Photographic Surveying     

Laurence P. Adams 《The Photogrammetric Record》2001,17(98):225-242

In the Preface to his book, The Four Faces of Fourcade, Clare Storrar (1990) wrote: "It is di.cult to appreciate the breadth and depth of Henry Georges Fourcade's intelligence and creative power. He was an intellectual giant, a phenomenon, whose theoretical and practical achievements have never received proper recognition. These were all the more remarkable because he began his original work on photogrammetry when science in South Africa was in its infancy, and he laboured alone far from libraries and other research facilities. His only higher academic training was in land surveying. He was adept in each of four sciences at various stages in his life, but, mainly because of his natural reserve, his reputation was highly compartmentalised. To foresters he was 'the most brilliant forestry officer of his time' to surveyors, he was exceptionally learned in theory and skilled in practice. Photogrammetry was a new subject, unheard of, except by a handful of scientists. In botany, which he took up seriously at the age of fifty-five, his work was highly regarded by leading botanists in South Africa and in Europe. All stood in awe of his extraordinary talent and ability. Some were frightened of him. But few were able—in fact, not even the best brains were wholly qualified—to grasp fully the tremendous intellectual stature and potential of this protean man."
This paper briefly describes the historic achievements of Henry Georges Fourcade, with the emphasis on his land surveying and, in particular, his photogrammetric contributions to science. The centenary of one of these, his proposal of a stereoscopic method of photographic surveying, occurs in October 2001.  相似文献   

Book Reviews     

《The Photogrammetric Record》2001,17(98):365-387

Books reviewed;
D. Fritsch and R. Spiller, Photogrammetric Week '99.
D. R. Wilson, Air Photo Interpretation For Archaeologists
D. R. Green, Gis: A Sourcebook For Schools
R. Gower, Workshop On National Mapping Agencies And The Internet
A. Flotron and O. Koelbl, Precision Terrain Models For Civil Engineering
P. Atkinson and D. Martin, Gis And Geocomputation. Innovations In Gis 7
R. P. Kirby, Revision Measurement Of Large Scale Topographic Data
J. Höhle, Automatic Orientation Of Aerial Images On Database Information
S. Dequal, L. A. Koen and F. Renaudo, Comparison Of National Guidelines For Technical And Cadastral Mapping In Europe ("Ferrara Test")
P. J. Gibson, Introductory Remote Sensing: Principles and Concepts
T. Luhmann, Nahbereichsphotogrammetrie: Grundlagen, Methoden Und Anwendungen  相似文献   

地形图数字化中图纸定向问题研究     

申立群 《测绘与空间地理信息》2001,24(3):13-15

从实践经验出发,结合相关技术基础,介绍在AutoCAD下进行地形图数字化时,原图定向的几种方法,并从精度、效率等方面进行了比较,最后给出软件实现的数字模型.  相似文献