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全国矿产地数据库是新一轮国土资源大调查数字国土工程的重要项目之一,是地质调查信息化工作中的基础性数据库。数据库包含了全国29个省(市、区),232类矿种达27 569个矿产地的矿产资源信息。工作范围覆盖了全国,较全面地反映了中国地矿部系统建国以来矿产资源勘查工作的成果。全国矿产地数据库全程包含质量监控,全国汇总过程中又进行了全面的复核、纠错,基本上达到了资料收集齐全、内容准确、数据录入完整准确,数据结构、数据精度都符合有关技术标准,总体质量可靠。全国矿产地数据库是一个矿种齐全、覆盖面广,内容丰富、数据量大且时间跨度大的大型数据库,为矿产资源调查评价、科研教学、矿业开发、规划管理提供了十分重要的基础信息。 相似文献
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简述基于MAPGIS建立华南地区矿产地数据库工作方法 总被引:1,自引:0,他引:1
本文简述了基于MAPGIS系统平台建立中南地区矿产地数据库的基本方法和步骤,并从数据类型、数据采集、数据属性及数据投影转换等方面进行了系统的总结. 相似文献
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地质图空间数据库数据量大, 内容复杂, 为了保证数据库的质量, 在地质图空间数据库的建立过程中, 对数据的全面系统检查工作是非常必要的。对于地质图空间数据库, 检查属性数据库的内容以及属性数据与空间图形数据的正确链接是难点之一, 也是一项最耗时的工作。为了科学、快速地检查地质图属性数据, 保证属性内容的正确性以及非空间数据与空间数据的正确对应, 针对这一问题, 在进行全国1:100万地质图空间数据库的检查时, 设计开发了属性数据库的自动检查系统。本文以近期完成的全国1:100万地质图空间数据库的检查系统设计研究为例, 主要介绍了地质图数据库属性数据自动检查系统的设计开发, 其中详细介绍了各模块可以实现的主要功能。通过此项检查, 能够提高入库数据的质量, 为数据库后期的应用与共享提供可靠保障, 从而为地质科学研究、矿产勘查及生态环境治理等提供科学的地质图数据资料。 相似文献
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为了落实<国务院关于加强地质工作的决定>,国家和地方均加大了矿产勘查工作,矿产地数据库等地质数字资料在找矿勘查中发挥了重要作用.随着全国矿产资源潜力评价工作和深部找矿工作的开展,矿产地数据库得到了广泛应用.矿产地数据库为保证数据的灵活性及多行业的通用性,其由11个表格包含的173个数据项组成,同时,受当时技术条件的限制... 相似文献
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中国镍铜铂族岩浆硫化物矿床矿产资源方面,全国尚无统一的矿产地质数据库。经过大量资料收集、数据整理和建库,完成了中国镍铜铂族岩浆硫化物矿床矿产地数据库的建设。在此基础上,以MAPGIS为平台进行程序编程,建立了数据信息丰富、库结构合理、具有多项实用功能的矿产空间数据库软件。借助空间数据库软件对中国镍铜铂族岩浆硫化物矿床进行地质研究,总结了中国此类矿床的小岩体成矿特征和富集规律。 相似文献
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地理信息系统(GIS)在组建和发展空间图形数据库中发挥着重要作用.GIS的核心是建立空间图形库与属性数据库的联动关系.在"辽宁省1/20万空间图形数据库"项目建库及系统结构设计中,利用国产GIS基础软件平台MAPGIS进行系统图层分类、数据输入和图形编辑,最终建立起空间图形数据库.利用GIS创建的空间图形数据库是进行其他地质研究的基础,可为下一步进行矿产预测提供多源图层及空间信息资料.GIS在矿产资源预测和其他地质领域,尤其是在区域地质调查、区域矿产资源与环境评价、矿产资源与矿权管理中也将发挥越来越重要的作用. 相似文献
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基于多层次多目标模糊优选法的流域初始水权分配——以张掖市甘临高地区为例 总被引:1,自引:1,他引:0
水权初始分配, 是水权制度建设中不可或缺的一部分, 它既可以有效地达到明晰水权的目的, 也为水权交易的发展提供基础和条件.以黑河流域中游张掖市甘临高地区作为研究区, 基于初始水权分配原则的指标体系, 选用2020年作为规划水平年, 采用多层次多目标模糊优选法分配流域区域初始水权, 并以2009年作为参照年, 通过对比参照年内不同的水权分配模式来验证该分配模型的合理性.结果表明: 在该分配模式下, 2020年甘州区初始水权的分配比例为35.8%, 临泽县的分配比例为30%, 高台县的分配比例为34.2%.另外, 通过合理性检验可知, 基于原则的综合分配模式, 相较于其他的分配模式, 更具现实性、 公平性、 高效性、 可持续性及政策性. 相似文献
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The failure criteria and dynamic evolution process of tunnel system deformation and instability have been one of the popular areas in the research field of underground engineering albeit one of the most difficult. The energy evolution model and critical failure criterion of the dynamic process in tunnel system instability are studied in this paper. Based on in situ measurements and the dissipative structure theory, the energy dissipation and dynamic evolution characteristics of the tunnel system instability has been presented. By using the basic laws of thermodynamics, the energy dissipation mechanism of the whole tunnel system has been explored, and an energy evolution model of the tunnel system instability has been established. On this basis, the degree of stability evolution process has been determined depending on the sample size (more than or <3,000). The energy criterion is proposed in accordance with the unstable and failure features of each evaluation stage of the tunnel system. This study has proved that the energy evolution model and critical failure criterion is reasonable and reliable in studying the stability analysis of an overlapped tunnels in Guangzhou metro, China. It also provides a significant guideline for the calculation and analysis of tunnel stability. 相似文献
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推荐系统算法是大数据挖掘的重要技术之一。根据钦杭成矿带南段文地幅1∶5万地质矿产调查所获得的数据,研究选取中型银金矿床、小型银金矿床(点)、确证无银金矿床、未评价区域(针对银金矿床)、中型铅锌矿床、小型铅锌矿床(点)、确证无铅锌矿床、未评价区域(针对铅锌矿床)作为待预测的能动项,选取加里东期混合岩、燕山早期侵入岩、燕山晚期侵入岩、北东向断裂、北西向断裂以及Au、Ag、Pb、Zn元素作为因素项,运用基于内容的推荐系统算法,构建能动项-因素项的效用矩阵,计算已知矿床(点)与其他未评价区域之间的相似度,进而预测银金矿床和铅锌矿床潜在的找矿区域。实验结果表明,推荐系统算法能够较好地挖掘与成矿有关的信息,快速抓取出与某类矿床(点)相似的潜在成矿区域。对于银金矿床,相似度较高的区域主要分布在已知矿点周围以及北东向断裂的两侧,少量分布于叠加断裂附近。对于铅锌矿床,中型铅锌矿床的结果显示出较高的区分度,高值区基本涵盖了所有已知的铅锌矿点,小型铅锌矿床的结果更加集中。除已知矿点外,还有几处高值区可作为重点的找矿靶区。 相似文献
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A digital landslide database has been created for Sichuan province, where a magnitude 8.0 earthquake at 2:28 p.m. on May 12, 2008, to provide the authorities and scientific communities with a tool for landslide risk assessment, emergency management, land-use planning, development of early warning system and enhancement of public awareness of natural hazards. Landslide data have been obtained from a variety of sources including technical reports and landslide inventory maps, and most of which were based on fieldwork and interpretation of aerial photographs. This paper presents the sources of landslide information, database design and the webGIS-based information management system. The database currently contains spatial information for about 9,000 landslides that were mostly triggered by the earthquake. Slide is the most common type of landslide in the database, but other types including rockfall and debris flow have also been identified. The website is an online GIS, providing access to comprehensive landslide information via the Internet. The development of the website allowed us to define the state of knowledge on landslide processes in Sichuan and to provide a preliminary identification of areas affected by landslides. 相似文献
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Omid Ghorbanzadeh Hashem Rostamzadeh Thomas Blaschke Khalil Gholaminia Jagannath Aryal 《Natural Hazards》2018,94(2):497-517
In this paper, we evaluate the predictive performance of an adaptive neuro-fuzzy inference system (ANFIS) using six different membership functions (MF). In combination with a geographic information system (GIS), ANFIS was used for land subsidence susceptibility mapping (LSSM) in the Marand plain, northwest Iran. This area is prone to droughts and low groundwater levels and subsequent land subsidence damages. Therefore, a land subsidence inventory database was created from an extensive field survey. Areas of land subsidence or areas showing initial signs of subsidence were used for training, while one-third of inventory database were reserved for testing and validation. The inventory database randomly divided into three different folds of the same size. One of the folds was chosen for testing and validation. Other two folds was used for training. This process repeated for every fold in the inventory dataset. Thereafter, land subsidence related factors, such as hydrological and topographical factors, were prepared as GIS layers. Areas susceptible to land subsidence were then analyzed using the ANFIS approach, and land subsidence susceptibility maps were created, whereby six different MFs were applied. Lastly, the results derived from each MF were validated with those areas of the land subsidence database that were not used for training. Receiver operating characteristics (ROC) curves were drawn for all LSSMs, and the areas under the curves were calculated. The ROC analyses for the six LSSMs yielded very high prediction values for two out of the six methods, namely the difference of DsigMF (0.958) and GaussMF (0.951). The integration of ANFIS and GIS generally led to high LSSM prediction accuracies. This study demonstrated that the choice of training dataset and the MF significantly affects the results. 相似文献