共查询到20条相似文献，搜索用时 154 毫秒
1.
数字地形图生产的质量控制与评价 总被引：1，自引：0，他引：1
总结了数字地形图的发展历程和数字地形图的生产过程,论述了数字地形图质量控制内容和质量检查的主要方法,提出了数字地形图质量评定标准并对数字地形图质量评定的方法进行了论述。 相似文献
2.
从总体论述了胶新线沉降监测中水准测量的实施方法。首先论述了胶新铁路的概况,以及本次测量的目的以及内容,然后论述了测量的原理和测试方法。重点论述了数据的处理理论与方法,其中包括异常数据的探测及粗差的处理,涉及最小二乘法;稳健估计;最后重点介绍了傅里叶分析在本次测量中的应用。 相似文献
3.
4.
5.
以黑龙江省主要农作物种植结构调查项目为例,论述了农作物遥感监测矢量成果的质量控制方法,主要从矢量成果的质量要求和质量检验两个方面进行论述,重点阐述了检验抽样方法、检查方法、检查内容及判定条件、质量评定方法、检验结论判定等内容,文中阐述的内容和方法将为农作物调查监测矢量成果的质量控制提供参考和借鉴。 相似文献
6.
7.
何宏 《测绘与空间地理信息》2015,(11):139-141
主要论述了网络RTK的基本原理,并针对网络RTK的几种方法进行了详尽的论述,并分析了各种方法的优缺点,为合理选用网络RTK技术提供了很好的借鉴。 相似文献
8.
9.
10.
分析了数据采集的基本方法，重点论述了远程智能数据采集系统的设计思想，方法和技术，实现了多点数据采集与处理系统的设计。 相似文献
11.
This study provides an assessment of changes in the terrain topography due to opencast coal mining in the Patratu region of Jharkhand state during the period of 1962–2007. It demonstrated the potential of digital elevation model (DEM) differencing technique using Cartosat-I satellite (2007) derived DEM with reference to DEM derived from contours obtained from Survey of India topographical map (1962). The topographical changes through DEM differencing revealed positive relief changes (up to 49 m) due to coal-mining overburden dumps. The dumping of overburden near the banks of perennial Damodar River also caused positive topographic changes (up to 20 m) indicating adverse effects on its hydrological regime. Negative relief changes are represents by deep depressions (up to 66 m) created within coal mines due to the extraction of coal. These depression areas within the abundant mines generally become the zones of water accumulation causing wastage of surface and ground water resources. 相似文献
12.
我国有60％的煤矿不同程度地受到底板岩溶承压水的威胁,尤其是奥陶系和寒武系灰岩含水层水量大、水压高,已经发生多次重大突水事故。底板突水的控制因素很多,主要有矿山压力、含水层水压、隔水层阻水能力、原始导高、构造复杂程度等,本文以梁北煤矿突水为例,在分析矿井突水因素基础上,综合选取上述因素作为评价指标并定量化,利用ArcGIS平台,构建了底板突水危险性多因素评价模型。评价结果表明,该矿在现有疏水降压条件下,从2008年8月,矿井东部采区11111,11151,21031工作面由中等危险区转为安全区,疏水降压取得显著效果。研究表明,GIS可在矿井防治水工作中发挥重要作用。 相似文献
13.
14.
《International Journal of Digital Earth》2013,6(1):43-65
Abstract The Digital Earth concept as originally proposed by former US Vice president Al Gore is now well established and widely adopted internationally. Similarly, many researchers world-wide are studying the causes, effects and impacts of Global Change. The authors commence by describing a five-step approach to the development of Digital Earth technologies. This is followed by a detailed account of Digital Earth research and developments in China. The authors then present the research results of Global Change studies carried out in China, based on the Digital Earth approach. These research results are based on a classification of global change regions. This covers the following global change situations: Forest and grassland fires in Northern China, temperate region desertification and dust storms, underground coal fires, deforestation and carbon sequestration, protection and utilisation of wetlands, Avian Influenza and the spread of diseases, Tibet Plateau uplift and sub-tropical monsoon climate region, and sea-level rise. The research results show that the environment does not behave in a way easily understood by the traditional disciplinary approach. Although man is clearly a contributing factor to certain Global Change aspects, such as underground coal fires, desertification, land use changes etc., many of the aspects of Global Change are naturally occurring phenomena which have been changing over centuries, and will continue to do so, no matter what actions we undertake to reverse these processes. Hence, in their conclusions, the authors propose that the communities involved in Digital Earth modelling and in Global Change research co-operate closer to overcome the limitations inherent in the current ‘conventional’ scientific approach, where scientists have very much stayed within their respective scientific boundaries. Such an integrated approach will enable us to build the next level of scientific infrastructure required to understand and predict naturally occurring environmental changes, as well as that of coupled human–environmental systems. 相似文献
15.
基于合成孔径雷达差分干涉测量（differential interferometric synthetic aperture radar，D-InSAR）技术的开采沉陷监测理论和方法是矿山变形监测领域研究的热点，当前已有学者融合单视线向D-InSAR技术和开采沉陷规律成功构建了开采沉陷三维监测模型，然而由于该模型仅融合了水平煤层开采地表沉陷规律，其并不适用于倾斜煤层开采地表沉陷监测。针对上述问题，根据D-InSAR监测的视线向变形与三维变形的关系，融合倾斜煤层开采地表沉陷规律，提出了基于单视线向D-InSAR技术的倾斜煤层开采地表沉陷监测方法。模拟实验表明，所提出的方法下沉监测相对误差绝对值小于9.53%，平均为1.31%，南北方向和东西方向水平移动监测相对误差绝对值小于9.78%，平均为3.71%，满足开采沉陷监测精度要求。并利用该方法成功监测了中国山东省兖州矿区南屯煤矿9310工作面在2012-01-27—2012-02-07期间开采引起的地表移动与变形。 相似文献
16.
动态矿区DEM生成方法及其在土地复垦中的应用研究 总被引：2，自引：1，他引：1
首先根据我国矿区土地复垦工作中存在的不足,通过研究提出"动态土地复垦"的概念,并确定了动态土地复垦方案制定的数据基础——动态矿区数字高程模型。动态矿区数字高程模型应该包含煤矿生产对地表的累积影响结果数据和地表的原始地形信息,开采沉陷预计结果可以提供前者,地面测量可以提供后者,经过数据处理可以按时间间隔生成描述塌陷区的一系列数字高程模型(DEM)(准动态),然后运用DEM的空间分析技术提取塌陷区在不同时间段的土地破坏类型、范围和位置数据,并根据这些数据进行动态土地复垦方案决策数据的提取,经实例验证该方法可行。 相似文献
17.
SBAS-InSAR方法支持下的矿区地表沉降监测及参数反演 总被引：2，自引：0，他引：2
煤矿开采极易诱发各类地质灾害,从而对矿区人民的生命财产安全带来严重影响。因此,对矿区地表进行形变监测及对其开采面参数进行反演获得形变规律,可有效防止矿区地质灾害的发生。本文选取山西省的店坪煤矿和汾源煤业作为研究区域,基于Sentinel-1A卫星影像数据,使用小基线集（SBAS）方法提取研究区的形变结果。使用Okada模型对5-101工作面参数进行反演和分析,并将反演结果与采工图实测数据进行对比验证。结果表明：①煤矿开采引起的地表形变程度与煤矿开采长度成正比;②急倾斜厚煤层开采引发的地表形变程度要比近水平薄煤层引起的地表形变程度大,更容易造成地表塌陷;③Okada模型反演较短近水平薄煤层的开采参数精度较高,说明该模型适用于此类型煤矿开采参数的反演。 相似文献
18.
为实现多光谱数据对煤矿区水体信息提取，以萍乡市芦新岭及周边煤矿为试验区，在国内外学者对水体指数法提取水体信息和应用的启发下，对试验区不同地物的波谱特征进行分析。本文首先利用数学统计方法建立一种ASTER数据综合归一化差异水体指数模型SWI ASTERxy，然后利用这一模型对试验区进行水体信息提取。试验表明，该模型能够有效地提取矿区各类水体，还可以运用在ASTER数据（或其他多光谱数据）对不同区域不同地物的提取，在遥感地物定量提取上具有很好的效果和潜力，具有一定的推广价值。 相似文献
19.
《International Journal of Digital Earth》2013,6(5):449-468
Abstract To investigate geological mining hazards using digital techniques such as high-resolution remote sensing, a semi-automatically geological mining hazards extraction method is proposed based on the case of the Shijiaying coal mine, located in Fangshan District, Beijing, China. In the method, the vegetation is first removed using the normalized difference vegetation index (NDVI) on the GeoEye-1 data. Then, geological mining hazards interpretation features are determined after color enhancement using principal component analysis (PCA) transformation. Bitmaps mainly covered by geological mining hazards are isolated by masking operation in the environment for visualizing images software. Next, each bitmap is classified into a two-valued imagery using support vector machine algorithm. In the two-valued imagery, 1 denotes the geological mining hazards, while 0 denotes none. Afterwards, the two-valued imagery is converted into a vector graph by corresponding functions in the ArcGIS software and no geological mining hazards regions in the vector graph are deleted manually. Finally, the correlation between factors (such as mining activity, lithology, geological structure, and slope) and geological mining hazards is analyzed using a logistic regression and a hazardous-area forecasting model is built. The results of field verification show that the accuracy of the geological mining hazards extraction method is 98.1% and the results of the hazardous-area forecasting indicate that the logistic regression is an effective model in assessing geological hazard risks and that mining activity is the main contributing factor to the hazards, while geological structure, slope, lithology, roughness of the surface, and aspect are the secondary. 相似文献
20.
数字龙江地理空间框架建设一期工程把全省1∶10 000地图的覆盖率由"十一五"的52%提高到92%,数字龙江地理空间框架建设一期工程成果提高了哈大齐工业走廊、东部煤电化基地等重点发展区域基础地理信息的现势性,及时填补了大小兴安岭生态功能保护区、北国风光特色旅游开发区等区域的基础地理信息资源空白,能够满足农业、林业、能源、交通、水利、生态、国土等工程规划、建设、运营对测绘基准和基本地图的需求。本文详细讲解了数字龙江地理空间框架建设一期工程成果归档的具体实施方法。 相似文献