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在基于单一方法进行油气勘探的过程中, 前人对波段比值的方法给了很高的评价, 但效果均不显著.为了找到一种高效的综合定量分析方法, 根据ETM+ (Enhanced Thematic Mapper Plus) 数据各个波段特征选取ETM753提取构造信息; 在构造控油理论基础上, 对各种比值(如5/1、7/5、7/3、(7-5) / (7+5)等) 分析; 使用标准偏差、相关系数、协方差和特征值对7种波段组合进行了叠加分析, 如[5, NDVI (the Normalized Difference Vegetation Index), 3]、[5, 4, NDVI]、[7, 5, (5/1) ]、[7, 5, (7/1) ]、[7, 5, (7/3) ]、[7, 5, (7/5) ]、[7, 5, (7-5) / (7+5) ]; 最后, 结合构造信息、地质资料等进行综合解译, 发现[7, 5, 7/3]为最佳的波段叠加组合.该方法用于新疆地区雅克拉地区油气晕信息提取效果较好, 同样也可以适用于其他地区. 相似文献
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In order to derive the distribution of olivine and pyroxene in Crater Copernicus,we compute two band ratios(950/750 and 2 000/1 500 nm) ,percent content of elements(Al%,Ca%,Mg%,FeO%) and maturity(Is/FeO) based on Clementine UVVIS and NIR image data.The central peaks of Copernicus,which are known to be olivine-rich or pyroxene-rich,are chosen as ground truth and ROIs used to derive the distribution of olivine and pyroxene with a decision tree and spectral angle mapper(SAM) .Additionally,we compared previous ... 相似文献
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在高校打造金课的背景下,针对G IS专业"计算机图形学"如何进一步提升教学质量的问题,结合G IS专业对"计算机图形学"的教学要求,以金课的"两性一度"为标准,构建以问题为导向的混合立体教学模式,探讨金课导向下GIS专业"计算机图形学"的教学思路、课程内容安排、教学方式方法、考核评价方法等内容.经教学实践表明,GIS专业"计算机图形学"的教学效果和质量有了很大的提高,极大提高学生对课程和GIS专业的学习能动性和探索精神,为GIS专业相关课程金课建设和提高GIS专业人才培养质量提供参考. 相似文献
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Satellite remote sensing data are usually used to analyze the spatial distribution pattern of geological structures and generally serve as a significant means for the identification of alteration zones. Based on the Landsat Enhanced Thematic Mapper (ETM+) data, which have better spectral resolution (8 bands) and spatial resolution (15 m in PAN band), the synthesis processing techniques were presented to fulfill alteration information extraction: data preparation, vegetation indices and band ratios, and expert classifier-based classification. These techniques have been implemented in the MapGIS-RSP software (version 1.0), developed by the Wuhan Zondy Cyber Technology Co., Ltd, China. In the study area application of extracting alteration information in the Zhaoyuan (招远) gold mines, Shandong (山东) Province, China, several hydorthermally altered zones (included two new sites) were found after satellite imagery interpretation coupled with field surveys. It is concluded that these synthesis processing techniques are useful approaches and are applicable to a wide range of gold-mineralized alteration information extraction. 相似文献