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Ontology-based analysis of multi-scale modeling of geographical features

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Science china(Technological Sciences) 2006年第z2期49卷 121-131页

作者： WANG Yanhui, LI Xiaojuan & GONG Huili key laboratory of Three-Dimensional Information Acquisition and Application, Ministry of Education, capital normal university, beijing 10003., china beijing key laboratory of resource environment and gis, capital normal university, beijing 10003., china capital normal Univ Minist Educ Key Lab Dimens Informat Acquisit & Applicat 3 Beijing 100037 Peoples R China capital normal Univ Beijing Key Lab Resource Environm Beijing 100037 Peoples R China capital normal Univ GIS Beijing 100037 Peoples R China

As multi-scale databases based on scale series of map data are built, conceptual models are needed to define proper multi-scale representation formulas and to extract model entities and the relationships among them. However, the results of multi-scale conceptual abstraction schema may differ, according to which cognition, abstraction and application views are utilized, which presents an obvious obstacle to the reuse and sharing of spatial data. To facilitate the design of unified, common and objective abstract schema views for multi-scale spatial databases, this paper proposes an ontology-based analysis method for the multi-scale modeling of geographical features. It includes a three-layer ontology model, which serves as the framework for common multi-scale abstraction schema; an explanation of formulary abstractions accompanied by definitions of entities and their relationships at the same scale, as well as different scales,which are meant to provide strong feasibility, expansibility and speciality functions; and a case in point involving multi-scale representations of road features, to verify the method's feasibility.

关键词： multi-scale representation, ontology-based analysis, multi-scale data modeling, hierarchical ontology.

A technique on automatic land-use database reconstruction based on scanning land-use map

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Science china(Technological Sciences) 2006年第z2期49卷 57-63页

作者： LI Xiaojuan, GONG Huili, YIN Lianwang, SUN Yonghua, YANG Lingli & WANG Yanggang key laboratory of 3D Information Acquisition and Application, Ministry of Education, capital normal university, beijing 10003., china key laboratory of resource environment and gis of beijing, capital normal university, beijing 10003., china capital normal Univ Minist Educ Key Lab D Informat Acquisit & Applicat 3 Beijing 100037 Peoples R China capital normal Univ Key Lab Resource Environm Beijing 100037 Peoples R China capital normal Univ GIS Beijing Beijing 100037 Peoples R China

Although a land-cover database is very important to national land use including urban planning and land-use management, it is very laborious and time-consuming to build through digitization of paper land-use maps (1:10000) and data input by hand. Here we propose a new, high-level, automatic technique to build a land-use database, which has proved useful and practical in building a land-use database of Baotou City.

关键词： land-use map vectonzation automatic building of land-use database.

A study on determining the location of groundwater divide using a mathematical morphology method

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Science china(Technological Sciences) 2006年第z2期49卷 141-148页

作者： PAN Yun, GONG Huili, DUAN Fuzhou & HU Zhuowei key laboratory of 3D Information Acquisition and Application, Ministry of Education, capital normal university, beijing 10003., china key laboratory of resource environment and gis of beijing, capital normal university, beijing 10003., china capital normal Univ Minist Educ Key Lab D Informat Acquisit & Applicat 3 Beijing 100037 Peoples R China capital normal Univ Key Lab Resource Environm Beijing 100037 Peoples R China capital normal Univ GIS Beijing Beijing 100037 Peoples R China

Placement of a groundwater divide indicates sink areas and spatial distribution, knowledge of which helps in the mapping of regional aquifer properties and the management of groundwater resources. By applying mathematical morphology to a conceptual model of a watershed and characteristic erosion and dilation operations, this paper proposes a structuring element with which to extract the shape and location of groundwater divide. With due consideration to watershed linearity, a structuring element with three origins is designed to connect watershed points. After erosion, closing, and dilation operations, the groundwater divide is determined; the results indicate this method's feasibility and accuracy.

关键词： groundwater divide, mathematical morphology, structuring element.

Research on the damage of the Great Wall of Ming Dynasty in beijing by remote sensing

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Science china(Technological Sciences) 2008年第S1期51卷 195-202页

作者： LI XiaoJuan,GONG HuiLi,ZHANG Ou,ZHANG WeiGuang & SUN YongHua The key lab of 3D Information Acquisition and Application,MOE,the key lab of beijing resource Envi-ronment and gis,and College of resource environment & Tourism,capital normal university,beijing 10003.,china capital normal Univ Key Lab Informat Acquisit & Applicat MOE Key Lab Beijing Resource Environm Beijing 100037 Peoples R China

Using aerial photos and high resolution satellite images of the year of 2004,this paper establishes remote sensing interpretation marks of the Great Wall of Ming Dynasty's damaged levels. Based on field survey and remote sensing survey in 1984,we analyzed present situation and changing characteristics being of the Great Wall of Ming Dynasty in beijing. The results show that about 7.02% of the wall is well-preserved (about 25861 m); 31.5% of the wall is slightly or moderately dam-aged (about 115989 m); 61.5% of the wall is badly damaged (about 226379 m). This paper analyzes the dynamic change of the Great Wall of Ming Dynasty. It shows that the damaged situation of the Great Wall of Ming Dynasty in beijing is serious. From 1984 to 2004,the well-preserved wall is decreased by 33206 m (decreased by 56%); badly damaged wall increased by 51207 m (increased by 67%). Finally,this paper analyzes the influence factors of damaging Great Wall. The conclusion is as follows: The damaged Great Wall is generally near the roads and villages,small slope,and easily arriving land.

关键词： the Great Wall of Ming Dynasty remote sensing interpreting damage dynamic change spatial analysis

Quantitative exploration of the mechanisms behind the urban thermal environment in beijing

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Progress in Natural Science:Materials International 2009年第12期19卷 1757-1763页

作者： Dan Meng,Xiaojuan Li~*,Wenji Zhao,Huili Gong key laboratory of 3D Information Acquisition and Application,Ministry of Education,key laboratory of resource,environment and gis in beijing,College of resources environment and Tourism,capital normal university,beijing 100048,china [a]key laboratory of 3D Information Acquisition and Application Ministry of Education Key Laboratory of Resource Environment and GIS in Beijing College of Resources Environment and Tourism Capital Normal University Beijing 100048 China

The driving mechanism behind the formation of urban thermal environments is the result of a combination of *** was chosen as the study area,and the technique of principal component analysis(PCA) was used.A spatial regression method was also applied for quantitative explanation of the thermal *** Landsat thematic mapper images were used to quantify potential causing *** the eigenvalues of each factor and its relationship with land surface temperature,the first three principal components(PCs) are regarded as the main causative factors explaining the mechanism as independent *** first three PCs mainly reflect urban construction,road density and the normalized difference vegetation index(NDVI),*** least squares,spatial lag and spatial error regression models were established separately for the relationships between the first three PCs and land surface temperature(LST).In the two spatial regression models,z-statistics for both the spatial lag parameter(ρ) and spatial residual parameter(λ) are significant,indicating the necessity of using spatial regression to replace the OLS regression model,as well as indicating that the spatial error regression model is superior to the spatial lag regression ***,the normalized difference built-up index(NDBI) and road density are the most significant positive contributions to LST.

关键词： Urban thermal environment Drive mechanism Spatial regression beijing

Using remote sensing to research beijing wetlands dynamics

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Science china(Technological Sciences) 2006年第z2期49卷 97-107页

作者： ZHAO Wenji, GONG Zhaoning, GONG Huili, LI Xiaojuan, ZHANG Songmei & LI Jing key lab of resource environment and gis of beijing, capital normal university, beijing 10003., china Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun 130012, china College of resources Science and Technology, beijing normal university, beijing 100875, china capital normal Univ Key Lab Resource Environm Beijing 100037 Peoples R China capital normal Univ GIS Beijing Beijing 100037 Peoples R China Chinese Acad Sci NE Inst Geog & Agroecol Changchun 130012 Peoples R China beijing normal Univ Coll Resources Sci & Technol Beijing 100875 Peoples R China

In beijing, where wetlands are important to municipal freshwater conservation and biodiversity retention, three different types of wetlands were identified: riverside wetlands, wetlands surrounding lakes and reservoirs, and wetlands in municipal *** sensing technology was applied in combination with field investigations to monitor and analyze the changes in these wetlands, and a combination of fusion technologies,Landsat TM/ETM+ and IKONOS imaging, was used to investigate and map them. This study indicates that not only have wetland areas been reduced by half, but also their ecological environments have been degraded because of rapid economic development and population increase. Suggestions based on this research are made to reconstruct the ecological environment of the wetlands and return them to their previous state.

关键词： beijing, wetland resource, remote sensing technology, ecological environment, dynamics.

Web gis design and realization for groundwater resources in the Yellow River basin

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Science china(Technological Sciences) 2004年第z1期47卷 106-117页

作者： GAO Jianguo1,2, GONG Huili1,2, ZHAO Wenji1,2, ZHANG Xiaosong1 & YAN Ning2 1. resource, environment and gis key laboratory of beijing, capital normal university, beijing 10003., china 2. 3 Dimension Information Extraction and Application key laboratory of Education Ministry, beijing 10003., china Correspondence should be addressed to Gong Huili Web gis design and realization for groundwa- ter resources in the Yellow River basin GAO Jianguo1,2, GONG Huili1,2, ZHAO Wenji1,2, ZHANG Xiaosong1 & YAN Ning2 1. resource, environment and gis key laboratory of beijing, capital normal university, beijing 10003., china 2. 3 Dimension Information Extraction and Application key laboratory of Education Ministry, beijing 10003., china capital normal Univ Resource Environm & GIS Key Lab Beijing Beijing 100037 Peoples R China 3 Dimens Informat Extract & Applicat Key Lab Educ Minist Beijing 100037 Peoples R China

This article brings forward a design and realization scheme of Web gis in the Yellow River basin for the management of groundwater resources. The main goals are to manage and share data of massive-scale, to support the research of groundwater resources in the Yellow River basin. In this paper we point out the necessity and feasibility of building the distributed Web gis for geographical research objects on a large scale. We put forward some solutions for the construction of this kind of system including a holistic deployment strategy in the Internet, a scheme of distributed data storage and management, a design of application structure based on three tires architecture by each province and how they collaborate with each other. It also illuminates how the application server works, and sets forth the relations among databases which work together in this system.

关键词： the Yellow River basin, groundwater, Web gis.

Synchronous estimation of DTM and fractional vegetation cover in forested area from airborne LIDAR height and intensity data

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Science china(Technological Sciences) 2008年第S2期51卷 176-187页

作者： BAO YunFei1,2,CAO ChunXiang1,ZHANG Hao1,CHEN ErXue3,HE QiSheng1,2,HUANG HuaBing1,LI ZengYuan3,LI XiaoWen1,4 & GONG Peng1 1 State key laboratory of Remote Sensing Science,jointly sponsored by the Institute for Remote Sensing Applications of Chinese Academy of Sciences and beijing normal university,beijing 100101,china 2 Graduate university of the Chinese Academy of Sciences,beijing 100049,china 3 Institute of Forest resource Information Technique,the Chinese Academy of Forestry,beijing 100091,china 4 Research Center for Remote Sensing and gis,Department of Geography and beijing key laboratory for Remote Sensing of environment and Digital Sites,beijing normal university,beijing 100875,china State key laboratory of Remote Sensing Science jointly sponsored by the Institute for Remote Sensing Applications of Chinese Academy of Sciences and Beijing Normal University Beijing 100101 China Graduate university of the Chinese Academy of Sciences Beijing 100049 China Institute of Forest resource Information Technique the Chinese Academy of Forestry Beijing 100091 China Research Center for Remote Sensing and gis Department of Geography and Beijing Key Laboratory for Remote Sensing of Environment and Digital Sites Beijing Normal University Beijing 100875 China

We proposed a method to separate ground points and vegetation points from discrete return,small footprint airborne laser scanner data,called skewness change *** method,which makes use of intensity of laser scanner data,is especially applicable in steep,and forested *** does not take slope of forested area into account,while other algorithms consider the change of slope in steep forested *** ground points and vegetation points can be used to estimate digital terrain model(DTM) and fractional vegetation cover,respectively.A few vegetation points which were classified into the ground points were removed as noise before the generation of *** method was tested in a test area of 10000 square meters.A LiteMapper -5600 laser system was used and a flight was carried out over a ground of 700―800 *** this tested area,a total number of 1546 field measurement ground points were measured with a total station TOPCON GTS-602 and TOPCON GTS -7002 for validation of DTM and the mean error value is -18.5 cm and the RMSE(root mean square error) is ±20.9 cm.A data trap sizes of 4m in diameter from airborne laser scanner data was selected to compute vegetation fraction *** of fractional vegetation cover was carried out using 15 hemispherical photographs,which are georeferenced to centimeter accuracy by differential *** gap fraction was computed over a range of zenith angles 10° using the gap light analyzer(GLA) from each hemispherical *** R2 for the regression of fractional vegetation cover from these ALS data and the respective field measurements is *** this study presents a method for synchronous estimation of DTM and fractional vegetation cover in forested area from airborne LIDAR height and intensity data.

关键词： LIDAR intensity skewness synchronous DTM fractional vegetation cover

Designing regional pattern for ecosystem restoration:A case study

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Science china(Technological Sciences) 2006年第z1期49卷 86-97页

作者： LI Guoqiang , MA Keming, FU Bojie & LIU Shiling State key lab of Systems Ecology, Research Center for Eco-environmental Sciences, Chinese Academy of Sciences, beijing 100085, china Department of Water environment, china Institute of Water resources and Hydropower Research, beijing 10003., china School of environmental Sciences, beijing normal university, beijing 100875, china 1. State key lab of Systems Ecology Research Center for Eco-environmental Sciences Chinese Academy of Sciences Beijing 100085 China 2. Department of Water environment China Institute of Water Resources and Hydropower Research Beijing 100038 China 3. School of environmental Sciences Beijing Normal University Beijing 100875 China

Designing regional pattern is challenging for ecosystem restoration both in theory and in practice. The present study proposed a new approach to design regional pattern for ecosystem restoration with a case in the arid valley of Upper Minjiang River, SW china. The procedures are: (1) Determine the regional pattern of main environmental factors based on the relationships between the important environmental factors and the main geographical factors generated from DEM data. (2) Overlay the maps of the main environmental factors. (3) Generate a lookup table according to the species selection rule we proposed to link the candidate restoration species to the main environmental factors.(4) Determine the regional pattern of ecosystem restoration by positioning the restoration species in the map of environmental factors according to the lookup table. The regional restoration pattern designed in this way would be applicable not only to restoring a region, but also to predicting the future landscape change.

关键词： environmental factors, gis, restoration species, Upper Minjiang River Valley.