MapGIS数据向ArcGIS转换方法探讨

本文探讨了MapGIS数据格式向ArcGIS数据格式转换的过程.由于转换过程中造成的中文属性丢失问题,提出了图件与属性分开导出的方法.其中中文点属性直接在MapGIS中导出,中文线面属性需外挂数据库进行导出.总结了在ArcGIS中进行图件填充以及图件与属性连接的方法.为MapGIS向ArcGIS的数据转换提供了参考.     

关于ArcGIS坐标转换方法及精度评估研究

在构建和运用地理信息体系时,常常会需要借助坐标转换来完成。在当前国内的测绘数据成果资料中,大部分1∶50000地形图是采取西安80坐标系建立的,还有部分地形图采用北京54坐标系完成的,我国已实现将国家现行的大地坐标系向国家2000大地坐标系的转变过程。ArcGIS是建立地理信息体系的主流平台,在国内地理数据信息的产出、数据库建立及系统应用开发之中都获得了广泛采用,从而形成大量根据ArcGIS建立的矢量信息数据。文中深入分析了ArcGIS的坐标转换方法,并且基于ArcGIS的坐标转换形式,针对国内常用坐标系转换系统,对点位坐标转换精度实施了评估。     

MapInfo数据Tab到ArcGIS数据Shapefile的转换

由于地图编辑和数据分析各具优势,MapInfo与ArcGIS目前在国内是应用比较广泛的地理信息系统平台,实现两者之间数据的转换有重要的实际意义。文中介绍了两种数据格式,并就一实例实现了由MapInfo数据Tab到ArcGIS数据shapefile的转换,最后对出现的问题进行了总结。     

MapGIS 6.X与ArcGIS 9.2空间数据转换的方法及问题探讨

在深入讨论MapGIS 6.X和ArcGIS 9.2两种GIS软件数据格式的基础上,提出了将空间数据从MapGIS平台向ArcGIS平台转换的基本思路,即要素分层—数据规范化标准—校正、投影变换—图元数据/注释数据—ShapeFile—专题图整饰,并通过实例进行了数据转换验证,对转换过程中存在的问题及解决方法进行了探讨.     

Maplnfo数据Tab到ArcGIS数据Shapefile的转换

由于地图编辑和数据分析各具优势,MapInfo与ArcGIS目前在国内是应用比较广泛的地理信息系统平台,实现两者之间数据的转换有重要的实际意义.文中介绍了两种数据格式,并就一实例实现了由MapInfo数据Tab到ArcGIS数据shapefile的转换,最后对出现的问题进行了总结.     

CAD数据到GIS数据自动转换方法探讨

分析了现有CAD数据与GIS数据转换的研究成果,在分析AutoCAD与ArcGIS数据特点的基础上,提出并设计了基于规则库的CAD数据到GIS数据转换方法,并基于该方法开发应用程序,通过在实际数据生产中的应用分析,该方法的优点是可避免数据转换过程的信息丢失和建立完整要素关系,并可通过规则库实现转换过程及质量的可控制性。     

规则库支持下的CAD数据到GIS数据自动转换方法探讨

论文分析了现有CAD数据与GIS数据转换的研究成果，在分析AutoCAD与ArcGIS数据特点的基础上，提出并设计了基于规则库的CAD数据到GIS数据转换方法，并基于该方法开发应用程序，通过在实际数据生产中的应用分析，该方法的优点是可避免数据转换过程的信息丢失和建立完整要素关系，并可通过规则库实现转换过程及质量的可控制性。     

基于ArcGIS和Creator的三维地形建模

利用ArcGIS和Creator在三维可视化建模方面的特点,根据构建三维地形数据来源的多样性,给出地形建模中数据的获取方法,并就数据的转换和优化处理进行了分析.以湄洲湾三维地形的可视化为例,提出了基于ArcGIS和Creator构建三维地形的方法和一般流程,探讨了地形数据库优化的方法.     

MapGIS到ArcGIS数据转换方法的分析研究

由于MapGIS和ArcGIS软件在地图编辑和数据分析方面各具优势,在国土资源管理工作中使用比较广泛,两者间的数据转换也十分频繁。如何对其进行快捷、有效、无损失的数据转换,是众多GIS用户和研究者所关心的。介绍一种直接读取MapGIS数据文件的转换方法,比较了MapGIS与ArcGIS存储结构的异同点,分析点状地物、线状地物、面状地物转换过程的差别,详述了采用COM技术编程加以实现数据转换的过程。     

基于ArcGIS和iData技术的地形图数据处理与入库对比分析

为了将AutoCAD格式的大比例尺地形要素依据地理信息数据字典及要素分类与代码标准完整无损、快捷的入库,文中基于ArcGIS和i Data技术对地形图数据的处理与入库做了对比分析。ArcGIS基于桌面编辑环境ArcMAP进行空间数据入库,i Data以ArcGIS平台中Personal GeoDataBase形式建立地理信息数据库实现DWG转MDB。结果表明:ArcGIS基于图形端编辑处理,对于数据的处理修改省时省力,但是入库后需在GIS平台进行拓扑检查,对编程要求高且增加了工作的重复率,数据容易丢失。i Data基于数据库端的入库技术,自定义数据转入方案,一键式CAD数据到MDB数据库的实现,能有效避免数据转换过程中要素和属性丢失的问题;图库一体化的作业模式,避免了数据重复生产问题。因此,在相同数据量和更新域的情况下,i Data数据处理与入库效率更高。i Data采用图库一体化作业模式,有效的避免了数据转换入库过程中数据的丢失、变形、属性结构不一致等问题,实现了数据的无缝转换。     

Markedness and its Interpretation in Language Use

Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.     

Features of Women's language

Language is a means of verbal communication. People use language to communicate with each other. In the society, no two speakers are exactly alike in the way of speaking. Some differences are due to age, gender, statue and personality. Above all, gender is one of the obvious reasons. The writer of this paper tries to describe the features of women＇s language from these perspectives： pronunciation, intonation, diction, subjects, grammar and discourse. From the discussion of the features of women＇s language, more attention should be paid to language use in social context. What＇s more, the linguistic phenomena in a speaking community can be understood more thoroughly.     

An Analysis of Catherine＇s Character——Wuthering Heights

Wuthering Heights, Emily Bronte＇s only novel, was published in December of 1847 under the pseudonym Ellis Bell. The book did not gain immediate success, but it is now thought one of the finest novels in the English language. Catherine is the key character of this masterpiece, because everybody and everything center on her though she had a short life. We can understand this masterpiece better if we know Catherine well.     

Lower Paleozoic oil relationships within Williston Basin, Canada

The Williston Basin is a significant petroleum province, containing oil production zones that include the Middle Cambrian to Lower Ordovician, Upper Ordovician, Middle Devonian, Upper Devonian and Mississippian and within the Jurassic and Cretaceous. The oils of the Williston Basin exhibit a wide range of geochemical characteristics defined as "oil families", although the geochemical signature of the Cambrian Deadwood Formation and Lower Ordovician Winnipeg reservoired oils does not match any "oil family". Despite their close stratigraphic proximity, it is evident that the oils of the Lower Palaeozoic within the Williston Basin are distinct. This suggests the presence of a new "oil family" within the Williston Basin. Diagnostic geochemical signatures occur in the gasoline range chromatograms, within saturate fraction gas chromatograms and biomarker fingerprints. However, some of the established criteria and cross-plots that are currently used to segregate oils into distinct genetic families within the basin do not always meet with success, particularly when applied to the Lower Palaeozoic oils of the Deadwood and Winnipeg Formation.     

低渗透非均质砂岩油藏启动压力梯度研究

理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。     

On Tragic Consciousness In The Works By Ernest Hemingway

As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.     

Design and analysis of generic LBS application developing platform

Location based services is promising due to its novel working style and contents.A software platform is proposed to provide application programs of typical location based services and support new applications developing efficiently. The analysis shows that this scheme is easy implemented, low cost and adapt to all kinds of mobile nework system.     

Achieving Unusual States of Matter Under High Pressure

正The periodicity of the elements and the non-reactivity of the inner-shell electrons are two related principles of chemistry,rooted in the atomic shell structure.Within compounds,Group I elements,for example,invariably assume the+1 oxidation state,and their chemical properties differ completely from those of the p-block elements.These general rules govern our understanding of chemical structures and reactions.Using first principles calcula-     

Exchange-Correlation and Electronic Excitation Energies from Pairing Matrix Fluctuations

We have developed an adiabatic connection to formulate the ground-state exchange-correlation energy in terms of pairing matrix linear fluctuations.This formulation of the exchange-correlation energy opens a new channel for density functional approximations based on the many-body perturbation theory.We illustrate the potential of such approaches with an approximation based on the particle-particle Random Phase Approximation(pp-RPA).This re-     

Density Functional Theory for the Response of Periodic Systems to Electric Fields Based on the Vector Potential Approach

正The electronic and nuclear(structural/vibrational)response of 1D-3D nanoscale systems to electric fields gives rise to a host of optical,mechanical,spectral,etc.properties that are of high theoretical and applied interest.Due to the computational difficulty of treating such large systems it is convenient to model them as infinite and periodic(at least,in first approximation).The fundamental theoretical/computational problem in doing so is that