共查询到20条相似文献，搜索用时 453 毫秒
1.
2.
《中华人民共和国地图编制出版管理条例》第二章地图编制管理中第六条:"中华人民共和国国界,按照中华人民共和国同有关邻国签订的边界条约、协定、议定书及其附图绘制;中华人民共和国尚未同有关邻国签订边界条约的界段,按照中华人民共和国地图的国界线标准样图绘制;世界各国国界,按照世界各国间边界标准样图绘制;世界各国间的历史疆界,依 相似文献
3.
4.
地球化学填图的发展属于勘查地球化学家的贡献。勘查地球化学家从发展局部矿产勘查至区域性矿产勘查,再从区域性地球化学填图至全国性乃至全球性地球化学填图。论述了西方国家、苏联和中国发展地球化学填图所走的不同道路,从而预见21世纪地球化学填图的标准化、多样化及其在解决资源与环境问题方面的重大作用。 相似文献
5.
地球化学填图的发展属于勘查地球化学家的贡献。勘查地球化学家从发展局部矿产勘查至区域性矿产勘查,再从区域性地球化学填图至全国性乃至全球性地球化学填图。论述了西方国家、苏联和中国发展地球化学填图所走的不同道路,从而预见21世纪地球化学填图的标准化、多样化及其在解决资源与环境问题方面的重大作用。 相似文献
6.
7.
整装勘查信息系统应用 总被引：1，自引：0，他引：1
以服务整装勘查业务管理与研究、支撑整装勘查区进展与成果展示为目标,基于GIS开发了以地质、矿产地、工作程度、矿业权、物探、化探、遥感、潜力评价成果等空间数据为基础的整装勘查信息系统。以大湖塘钨(铜)多金属矿整装勘查区为例,对系统的功能进行了应用与验证。案例应用结果表明: 系统界面友好,功能齐全明了,易学习易操作,可将各类数据组合叠加浏览,提供"一张图"的数据空间展示,用户可通过在全国地图上直观地浏览各整装勘查区矿产勘查进展,建立矿产勘查进展空间分布格局,还可以借助系统完成统计分析、专题图件制作等,极大提高了整装勘查业务管理和研究的效率。 相似文献
8.
地球化学填图与地球化学勘查 总被引：3，自引：0，他引：3
在中国与西方国家，地球化学填图的目的与做法并不相同，西方的地球化学填图是由研究机构开展的，使用等离子焰光量计、X射线荧光光谱仪等大型仪器进行多元素分析，目的是取得多种元素在地球表层分布的基础性资料。地球化学勘查则由矿业公司主要分析少量成矿元素，目的是为了找矿。而中国的地球化学填图计划却做出了巨大努力，使地球化学填图取得的资料既有学术价值又对矿产勘查具有重大的实用意义。本文详细讨论了西方国家与中国地球化学填图与地球化学勘查的思路、方法与技术的演变，并瞻望了地球化学填图在21世纪的巨大发展前景。 相似文献
9.
10.
着重介绍了ＧＫＰＸ交互式固体矿产勘查微机评价系统的主要技术方法和各系统子模块的功能及实现。该系统通过Ｃ语言与数据库件的实时数据处理的自动成图技术，开发了丰富的、满足精度要求的储量计算有关勘探图件，以高效先进的件流管理方式，成功地实现了固体矿产勘查评价的计算机化。 相似文献
11.
The article focuses on the way in which map content reflects the cartographer's World view and system of values. Different
World views are illustrated historically. Examples of topographical, land-use and vegetation maps from different parts of
the World indicate the prevalence of Eurocentric perceptions in cartography. Different geological maps of Norden show how
the visual image depends on the classification system adopted. All maps are mental maps in that their content is culturally
determined and ethnocentric in origin. 相似文献
12.
A. G. Smith 《International Journal of Earth Sciences》1981,70(1):91-127
This paper outlines a method used to make paleocontinental maps and outlines its limitations. 15 pairs of new Lambert equal-area paleocontinental maps are presented, drawn at 40 Ma intervals from the present-day back to 560 Ma (early Cambrian time).
Zusammenfassung 15 Paare von paläoglobalen Karten werden hier nach einer Lambertschen flächengetreuen Projektion mit Hilfe eines Rechnerprogrammes dargestellt. Der Zeitabschnitt umfaßt in 40 Mill. Jahres-Schritten die letzten 560 Mill. Jahre seit dem Kambrium.
Résumé Ce travail définit la méthode utilisée pour dresser des cartes paléocontinentales, ainsi que ses limitations. — 15 paires de cartes paléocontinentales sont présentées, dessinées à des intervalles de 40 M. a. depuis l'époque actuelle jusqu'à 560 M. a. (début du Cambrien).
, , . 15 , , .. 560 , 40 .相似文献
13.
Standardization of vulnerability maps 总被引：3，自引：0，他引：3
Groundwater vulnerability assessment schemes are used for the estimation of potential groundwater contamination at different
scales and on different administrative levels. However, the term vulnerability is not standardized and the available methods
are not able to give a unique assessment of vulnerability creating thus uncertainty in the interpretation and in further application
concerning decision creation processes. To judge the information of vulnerability maps certainly and to value the general
trends of vulnerability assessment of different methods, four different vulnerability methods of the parametric system group
have been applied on a karst area in southwestern Germany to perform a comparative assessment and correlation of these vulnerability
assessment methods, namely DRASTIC, PI, EPIK, and GLA. It is shown that by means of simple statistical considerations the
first highly different vulnerability maps could be made more coherent after reclassification. The reclassified vulnerability
assessments show a more consistent vulnerability distribution pattern and provide the possibility of area-wide validation
of the maps as the chosen vulnerability classification is theoretically connected to the mean transit time of percolation
water and is largely independent of the applied vulnerability assessment method. 相似文献
14.
A number of aspects related to vulnerability maps are discussed: the vulnerability concept, mapping purposes, possible users, and applicability of vulnerability maps. Problems associated with general-type vulnerability mapping, including large-scale maps, universal pollutant, and universal pollution scenario are also discussed. An alternative approach to vulnerability assessment—specific vulnerability mapping for limited areas, specific pollutant, and predefined pollution scenario—is suggested. A simplification of the vulnerability concept is proposed in order to make vulnerability maps more objective and by this means more comparable. An extension of the vulnerability concept to the rest of the hydrogeologicar cycle (lakes, rivers, and the sea) is proposed. Some recommendations regarding future activities are given. 相似文献
15.
Analysis of geochemical maps and their legends permits the proposal of several ways of improving their information content. Firstly, coherent and comparable classification of the objects to be presented must be developed. This classification should be based on strictly defined quantitative geochemical features of the objects; natural associations, anomalous elements, rocks, ore deposits and ore-bearing areas. Secondly, the most informative features of objects must be selected and uniquely displayed with a standard set of symbols. These symbols must be clear, readily understood and logically connected. The third requirement is that maps must be prepared in accordance with the tasks they are intended to deal with, must be optimally scaled, and display only appropriate information.One possible way of meeting the above-mentioned requirements, is proposed in a system of geochemical discrimination and related map presentation methods. The latter involves black hachures for the geological base, and directed colour lines and other features of colour hachures to characterize geochemical associations. Ore deposits may be characterized on the basis of eight most meaningful features encoded in one complex hieroglyph-like symbol constructed from easily understood and memorable components. This type of construction facilitates the computerized analysis of maps and makes them far more useful for prognosis, genetic reconstruction and resource evaluation. 相似文献
16.
17.
18.
Mere Roberts 《GeoJournal》2012,77(6):741-751
In common with other oral societies, New Zealand Maori constructed mental maps by means of which they made sense of their phenomenological world. Their cognitive template, called whakapapa, consists of a genealogical framework upon which spiritual, spatial, temporal and biophysical information about a particular place is located. These many-layered cosmoscapes performed various roles in traditional society. Analysis of several whakapapa of plants and of lizards suggest that these include a folk taxonomy of the culturally important biota in a particular place; spatial delineation of environmental realms or territories that describe key ecosystems or habitats and their functional inter-relationships; the cosmogonical origins and history of the phenomena in that whakapapa; moral instruction; and provision of a useful mnemonic facilitating retention and recall. In common with other indigenous cultures, whakapapa can also be described as performance cartography in that they are dependent on oral transmission involving narrative, song, and other physical activities whereby the knowledge specific to a place comes to be known. 相似文献
19.
A microcomputer-aided drafting system is used at the Geological Survey of Canada, Calgary, to make large charts and legends for the Geologic Atlas of Canada. Hand-drafting of Atlas maps may be supplemented by a digital geologic map database created by a new microcomputer and videotracing system at CAL-CAD. Video-tracing is more rapid and discriminating than existing rasterscan and digitizing table systems, as an image of the map is multiplexed (overlain) on-screen with AutoCAD. Interactive tracing and storage of each data type as a separate layer of file aids accuracy, and adds great editing power and output flexibility to geological and geophysical maps, cross sections, logs, and other complex diagrams. New digital and old paper databases can be merged into powerful geographic information systems.Read by M. Marchand (Canterra Energy Ltd., Calgary) at Emerging Concepts, MGUS 87 conference, 13–15 April 1987, Redwood City, California. 相似文献
20.
Deformation mechanism maps for feldspar rocks 总被引：6，自引：0，他引：6
Deformation mechanism maps for feldspar rocks were constructed based on recently published constitutive laws for dislocation and grain boundary diffusion creep of wet and dry plagioclase aggregates. The maps display constant temperature contours in stress-grain size space for strain rates ranging from 10−16 to 10−12 s−1.Two fields of dominance of grain boundary diffusion-controlled creep and dislocation creep are separated by a strongly grain size-sensitive transition zone. For wet rocks, diffusion-controlled creep dominates below a grain size of about 0.1–1 mm, depending on temperature, stress, strain rate and feldspar composition. Plagioclase aggregates containing up to 0.3 wt.% water as often found in natural feldspars are more than 2 orders of magnitude weaker than dry rocks. The strength of water-bearing feldspar rocks is moderately dependent on composition and water fugacity.For a grain size range of about 10–50 μm commonly observed in natural ultramylonites, the deformation maps predict that diffusion-controlled creep is dominant at greenschist to granulite facies conditions. Low viscosity estimates of 1018–1019 Pa·s from modeling postseismic stress relaxation and channel flow of the continental lower crust can only be reconciled with laboratory experiments assuming dislocation creep at high temperatures >900 °C or, at lower temperatures, diffusion creep of fine-grained rocks possibly localized in abundant high strain shear zones. For similar thermodynamic conditions and grain size, lower crustal rocks are predicted to be less than order of magnitude weaker than upper mantle rocks. 相似文献