共查询到20条相似文献，搜索用时 937 毫秒
1.
Based on the developing tendency of present China's basic GIS, this paper discusses the designing idea for scales of 1∶10 000, 1∶50 000, 1∶250 000 and 1∶1 000 000 pyramidlike multi-layer and multi-resolution of the basic GIS. A technical line for the construction of basic GIS of the whole country and various provinces for sustainable development is put forward. And some important theoretical GIS issues touched by the technical process are discussed. 相似文献
2.
［1］Balce A E. Determination of optimum sampling interval in grid digital elevation models (DEM) data acquisition.Photogrammetric Engineering and Remote Sensing,1987,531:323～330
［2］Li Z L. Sampling strategy and accuracy assessment for digital terrain modelling: [Ph. D Thesis]. UK: University of Glasgow, 1990
［3］Li Z L. Variation of the accuracy of digital terrain models with sampling interval. Photogrammetric Record, 1992,14:113～128
［4］Li Z L. A comparative study of the accuracy of digital terrain models(DTMs) based on various data models. ISPRS Journal of Photogrammetry and Renote Sensing,1994,49(1):2～11
［5］Li Z L. Scale issues in geographic information science. In:Proceeding of International Workshop on Dynamic and Multi-dimensional GIS. Hong Kong, 1997. 143～158
［6］SISM. Specification of geospatial data (Provisional) for 1:10 000 digital elevation models. The Standard Institute of Surveying and Mapping (SISM), National Bureau of Surveying and Mapping, China, 1997(in Chinese)
［7］USGS. National Mapping Program: Geospatial Data Standard, 1992
［8］Zhu Q, Cheng C J. The fast generation and dynamic updating of TIN. Journal of Wuhan Technical University of Surveying and Mapping, 1998(in Chinese) 相似文献
3.
Application of GIS to estimate soil erosion using RUSLE 总被引：9，自引：0，他引：9
Mushtak Talib Jabbar 《地球空间信息科学学报》2003,6(1):34-37
This paper describes the use of the Arc/Info and ArcView GIS tools to estimate soil erosion with Universal Soil Loss Equation (USLE).Calculations are be done by using capabilities available.This study start with a digital elevation model(DEM) of Shaanxi,which was created by digitizing contour and spot heights from the topographic map on 1:250000 scale and grid themes for the USLE K and C factors.It is note worthy that USLE K can be obtained by adding the K factor as an attribute to a soil theme‘s table.The C can be obtained from tables or using the information about land use and management given by USLE program.A land use theme can be used to add the C factors as an attribute field.The purpose of this study is to establish spatial information of soil erosion using USLE and GIS and discuss the analysis of the soil erosion and slope failures in GIS and formulate the possible framework. 相似文献
4.
Matthias Braun Jefferson Cardia Sim“非汉字符号”es N.Blindow Steffen Vogt U.F.Bremer M.Pfender H.Saurer F.E.Aquino F.A.Ferron 《地球空间信息科学学报》2001,4(2):47-51
1 ＩｎｔｒｏｄｕｃｔｉｏｎＡｔｐｒｅｓｅｎｔ,ＫｉｎｇＧｅｏｒｇｅＩｓｌａｎｄ (ＫＧＩ)ｉｓｏｎｅｏｆｔｈｅｍｏｓｔｆｒｅｑｕｅｎｔｅｄｓｉｔｅｓｉｎＡｎｔａｒｃｔｉｃａ .Ｉｎｔｏｔａｌ,9ｐｅｒｍａｎｅｎｔｒｅｓｅａｒｃｈｓｔａｔｉｏｎｓａｒｅｉｎｏｐｅｒａｔｉｏｎａｎｄｓｅｖｅｒａｌｒｅｓｅａｒｃｈｃａｂｉｎｓｈａｖｅｂｅｅｎｃｏｎｓｔｒｕｃｔｅｄ .ＤｕｅｔｏｔｈｅｅａｓｙａｃｃｅｓｓｖｉａｔｈｅＣｈｉｌｅａｎａｉｒｓｔｒｉｐｔｈｅｎｕｍ ｂｅｒｏｆｔｈｅｉｓｌａｎｄ’ｓｉｎｈａｂｉｔａｎｔｓｒ… 相似文献
5.
A classification of water erosion models according to their geospatial characteristics 总被引：3，自引：0，他引：3
《International Journal of Digital Earth》2013,6(3):229-250
In this article, an extensive inventory in the literature of water erosion modelling from a geospatial point of view is conducted. Concepts of scale, spatiality and complexity are explored and clarified in a theoretical background. Use of Geographic Information Systems (GIS) is pointed out as facilitating data mixing and model rescaling and thus increasing complexity in data-method relations. Spatial scale, temporal scale and spatial methodologies are addressed as the most determining geospatial properties underlying water erosion modelling. Setting these properties as classification criteria, 82 water erosion models are identified and classified into eight categories. As a result, a complete overview of water erosion models becomes available in a single table. The biggest share of the models is found in the category of the mechanistic pathway-type event-based models for watershed to landscape scales. In parallel, geospatial innovations that could be considered as milestones in water erosion modelling are highlighted and discussed. An alphabetical list of all models is also listed in the Appendix. For manipulating scale efficiently, two promising spatial theories are suggested for further exploitation in the future such as hierarchy theory and fractals theory. Regarding erosion applications, uncertainty analysis within GIS is considered to be necessary for further improving performance of erosion models. 相似文献
6.
基于语义映射的空间数据转换及其应用研究 总被引：3，自引：0，他引：3
数据转换是GIS工程建设中的一个十分重要的内容,传统的方法往往只是进行数据格式的转换,忽略了空间数据之间的内在联系,本文将语义映射和空间操作相结合,实现空间数据和属性数据的重构,从而实现异构数据的快速转换。 相似文献
7.
LIU Chun LIU Dajie 《地球空间信息科学学报》2001,4(1):62-67
1 ＩｎｔｒｏｄｕｃｔｉｏｎＳｐａｔｉａｌｄａｔａｉｓｔｈｅｂａｓｉｓｏｆｔｈｅＧｅｏｇｒａｐｈｉｃＩｎｆｏｒ ｍａｔｉｏｎＳｙｓｔｅｍ (ＧＩＳ)ａｎｄｎｏｎ＿ｓｐａｔｉａｌｄａｔａｉｓｔｈｅｉｎｔｅｎｓｉｏｎａｎｄｔｈｅｄｅｓｃｒｉｐｔｉｏｎｏｆｇｅｏｇｒａｐｈｉｃｃｅｌｌ.Ｔｈｅｑｕａｌｉｔｙｏｆｄａｔａａｆｆｅｃｔｓｇｒｅａｔｌｙｏｎｔｈｅｒｅｓｕｌｔｏｆａｐｐｌｉｃａｔｉｏｎａｎａｌｙｓｉｓａｎｄｔｈｅｒｅａｌｉｚａｔｉｏｎｏｆｔｈｅｐｒａｃ ｔｉｃａｌｔａｒｇｅｔｉｎＧＩＳ .Ｔｈｅｑｕａｌ… 相似文献
8.
随着现代化建设的快速发展,地理信息产业得到了蓬勃发展。当前GIS的核心已从单纯的数据生产转为面向更新的数据生产。本文对当前基础地理数据更新生产的模式和技术方法的发展趋势进行分析,并结合基础地理数据更新生产的特点,从应用角度对更新生产中的方案制作和数据转换技术进行探讨。 相似文献
9.
10.
GEODESY AND DIGITAL CARTOGRAPHIC SURVEY IN FILDES PENINSULA,REY JORGE ISLAND,ANTARCTICA 总被引：1，自引：0，他引：1
Jürgen Klotz 《地球空间信息科学学报》2001,4(2):25-31
1 ＩｎｔｒｏｄｕｃｔｉｏｎＴｈｅｉｎｃｒｅａｓｅｉｎｒｅｓｅａｒｃｈｉｎｔｈｅＣｈｉｌｅａｎＡｎｔａｒｃｔｉｃＴｅｒｒｉｔｏｒｙｈａｓｂｅｃｏｍｅｍａｎｉｆｅｓｔｏｖｅｒｔｈｅｌａｓｔｔｅｎｙｅａｒｓｉｎｔｈｅｓｕｂｓｔａｎｔｉａｌｉｎｃｒｅａｓｅｉｎｔｈｅｎｕｍｂｅｒｏｆｓｃｉｅｎｔｉｆｉｃｓｔａｔｉｏｎｓｅｓｔａｂｌｉｓｈｅｄａｎｄｍａｉｎｔａｉｎｅｄｏｎＲｅｙＪｏｒｇｅＩｓｌａｎｄ ,ｍａｋｉｎｇｉｔｎｅｃｃｅｓａｒｙｔｏｒｅｇｕｌａｔｅｔｈｅｕｓｅｏｆｔｈｏｓｅａｒｅａｓｏｆｉｎｔｅｒｅ… 相似文献
11.
西部大开发与政府GIS 总被引：3，自引：2，他引：1
围绕西部大开发的总体指导思想和重点任务 ,讨论了政府 GIS的基本概念和技术特点 ,基础测绘信息与政府 GIS,政府 GIS在西部大开发中的辅助决策功能 ,政府 GIS在基础设施建设、生态环境保护和产业结构调整等方面的作用和已取得的阶段性成果及其应用等。 相似文献
12.
13.
A. Stewart Fotheringham 《Journal of Geographical Systems》2000,2(1):71-76
The relationship between spatial analysis and GIS has been a debating point for over a decade. Some see GIS as leading the
way to a new era in which the desire and the ability to analyse spatial data is widespread, not just in geography but throughout
all disciplines in which spatial data are encountered. Others see GIS as simply providing a medium for the recycling of out-dated
spatial analytical techniques and models. This paper describes a role for GIS through the development of new forms of ‘local’
or ‘context-dependent’ spatial analytical methods in which the focus is on exceptions to the general trend represented by
the more traditional ‘global’ methods. 相似文献
14.
15.
地理信息服务质量(QoGIS):概念和研究框架 总被引：2，自引：0，他引：2
在探讨地理数据特点的基础上，提出了地理信息服务质量（QoGIS）的概念和研究框架，设计了一个体现地理信息服务质量的原型系统架构。 相似文献
16.
结合城市航测1:500大比例尺数字化地形图成图的实践,参照国内外GIS工程建设的经验,浅述城市UGIS建设中航测数字化地形图的应用及其相应的数据规范标准化技术。 相似文献
17.
以1∶2 000数字化地形图缩编1∶10 000地形图为例进行研究,通过对已有资料及现有技术标准的考察,依照制图综合的基本原理,总结出了1∶2 000地形图缩编的流程、基本方法。 相似文献
18.
基于GIS的海洋和大气数据管理与可视化研究(英文) 总被引：2，自引：1，他引：1
A GIS for ocean applications called “the Xiamen Atmospheric and Oceanographic Data Management and Display System (AODMDS)”
has been designed and developed. The system is based on ArcObjects (AO), a component-based GIS development tool. The paper
discusses in detail the storage and organization of the atmospheric and oceanographic data, the strategy and methods for the
visualization and mapping of oceanographic and atmospheric data, and the implementation of the methods in AODMDS. It also
discusses some advanced display control techniques that expand the functions of ArcObjects. One of the techniques is “gradient-fill-style
color-map control,” which provides a feasible color-rich display control for all types of raster maps. As a stand-alone desktop
GIS system built on AO, AODMDS provides effective data management and powerful mapping and visualization functions for atmospheric
and oceanographic data.
相似文献
19.
ABSTRACTThe certification of geographic information system (GIS) professionals remains a contentious topic. After more than 25 years, the GIS community remains divided over the need to formally recognize GIS professionals who maintain standards of professional competency and conduct. Unfortunately, few studies have examined individuals who have become certified or the professional benefits of certification. This study explores GIS certification through a survey of 1731 geospatial professionals who became geographic information systems professionals (GISPs) between 2003 and 2014. A web-based questionnaire asked GISPs about the certification process, its influence on their compensation and advancement, and other issues. Quantitative and qualitative findings suggest that perceptions about certification fall along a wide spectrum with GISPs employed in private industry seeing fewer benefits compared with those employed in government or not-for-profit organizations. While a large number of respondents conveyed pride in completing the certification process, others expressed frustration over the program’s lack of visibility, standards that have enabled less qualified peers to become certified, and the slow progress at which GIS certification has achieved respect compared with programs administered in other fields such as engineering and planning. 相似文献
20.
简要介绍“数字哈尔滨”与空间基础地理信息系统的关系。阐述空间基础信息系统在“数字哈尔滨”中的建设内容、原则及获取方法 相似文献