Key words: typhoon; simulation; wintertime; cold surge; water vapor Urban land cover classification using polarimetric SAR interferometry

Xinwu Li*^a, Eric Pottier^b, Laurent Ferro-Famil^b, Huadong Guo^a

At this paper, from high resolution airborne E-SAR PolinSAR data and its statistical characteristics, Urban area land cover unsupervised classification method using polarimetric, coherence and interferometric phase differentials was proposed, and what is the role of interferometric phase differential for identification and classification of the target with vertical structure was investigated; and the potential and validation of PolinSAR data for urban area land cover identification and classification was demonstrated. The preliminary result indicates that the good classification result has been obtained, and the inclusion of interferometric phase differential significantly improved the building or man-made target identification and classification.

hong Wu, Quanjun Jiao and Wenjuan Zhang

Center for Earth Observation and Digital Earth，Chinese Academy of Sciences, Beijing 100190

ABSTRACT

The spatial variation of collapsing houses caused by the earthquake may be used to assess the earthquake damage intensity, and support the emergency decision-making process in rescue and recovery operations. We monitored the spatial variation of house collapse ratio in the 5.12 Wenchuan earthquake by the aerial images, and analyzed the relationship with the earthquake intensity and assessed the afflicted population from the population and house collapse ratio. The house collapse ratio was derived based on the results of visual interpretation of the collapsed houses and noncollapsed houses by ADS40 airborne images acquired from May 15 to May 28, 2008. The results show that the houses were widely damaged in earthquake-damaged region; especially the counties of Wenchuan, Beichuan, Qinchuan, Mianzhu, Shifang and Pengzhou experienced the severest damage. The house collapse ratios, which are above 50%, mainly distributed along the surface rupture in a SW to NE direction from Yinxiu to Beichuan. When analyzing the spatial variation of the house collapse ratio and its relationship with the earthquake intensity, it was found the house collapse ratio and the earthquake intensity presented positive correlation. A index called the afflicted population which derived by the house collapse ratio multiplying the population density showed a correlation with the actual fatalities population, which will be available to provide the reference information for the decision-making of rescue areas where the life of peoples may be urgently needed to rescue.

Tang Wei∗, Luo Bin, Wu HuanPing, Zhen WeiJiang, Lv ZhongLiang

National Meteorological Center, CMA, Beijing, China, 100081

ABSTRACT

This paper introduces the development of System of Meteorological Disaster Management and Assessment (MDMAS), using a new method that flexibly integrates GIS with assessment models. The framework of MDMAS includes data layer, middle layer and application layer. The data layer combines meteorological database, disaster database and basic geographic information. The middle layer has data access component, model component, model driver engine, GIS kernel component, cartography component and system management component. The application layer includes some function components, such as collecting relevant disaster information, inquiring and analyzing meteorological data, integrating assessment models, and cartography based on meteorological subjects and disaster information. Finally, this paper introduces in detail the typhoon and rainstorm assessment model, disaster data query and statistics, automatic cartography for disaster. In practice, MDMAS has been utilized to provide warning information and produce assessment of disaster. MDMAS is an efficient tool in meteorological disaster management and assessment, supporting decision-making and service production manufacture.

Zhao Zhongyuan∗a,b , Li Zonghuab

aschool of Remote Sensing Information Engineering, Wuhan University, Wuhan 430072,China

bWuhan Urban Planning Information Center, Wuhan, China 430014

3D digital map is the further development of digital city, and 3D space foundation in city detailed management. First, the concept, character, main content and applications about 3D digital map are described. And then some key issues, such as management of tremendous data, 3D modeling, visualization and analysis technology are discussed, the end, the achievement of Wuhan 3D digital map system is introduced.

Liming Wang *, Qinjun Wang

Lab of Digital Earth Sciences, Chinese Academy of Sciences, P.O.Box 9718,20A Datun Road, Chaoyang District, Beijing, , China，100101

ABSTRACT

On the basic of detailed analysis of several classic topographic correction methods, authors proposed a new semi-empirical method according to the theory of SCS, C and Minnaert correction, which accounts for diffuse irradiance from C correction and the non-Lambertian reflectance behavior of a surface from Minnaert correction. In addition, it has the advantages of SCS method which preserve the geotropic nature of trees (vertical growth) regardless of terrain, view, and illumination angles. The new method was tested by ETM imagery acquired on April 30th, 2000 in the Miyun county of Beijing, China. We analyzed comparatively the correction results through visual analysis of corrected images, statistical analysis of mean and standard deviation and the correlation analysis between radiance and the illumination angle. The results show that the correlation between the illumination angle and radiance corrected by the new method decreases obviously and its spectral characteristics are preserved perfectly. It was concluded that the new method should be considered as a good method for topographic correction of optical remote sensing imagery in rugged terrain.

Wenyou Fan^a, Jie Gong^b, Hulin Li^b

It is a complex process for forest fire happen and developed. Forest fire is caused by many factors which included natural and social. For the purpose of judging trend of fire、making quick response and fire fighting, it is crucial that fire personnel had no sooner got detail information than fire happen. With the help of 3S technique, information can be got quickly and accurately through forest fire prevention platform.

This paper firstly introduces the concept of 3S and its characteristics, and how they worked in the application of forest fire fighting. It gave a principle about how to use 3S technology to build forest fire prevention system. It also explained why 3S technology would be chosen as basic technology which used in building forest fire prevention platform. Then, this paper drew out a general framework about forest fire fighting platform. The platform made up by five subsystems included forest fire prevention information management subsystem、fire fighting subsystem and real-time monitoring subsystems、fire forecasting subsystem、fire facilities layout analysis subsystem and disaster assessment subsystem. The functions of each of these subsystems as well as how to realize these functions were intruded exactly. This platform associated with many significant technologies not only included 3S (GIS RS GPS), but also included modern communication technology、computer network technology、multimedia database technology、 real-time monitoring technology、 display control technology and so on. This designed platform had functions of data input、spatial database management、attribute database connection、searching and analysis、graphical output、the production of thematic maps and so on.

This platform can be applied in very fire protection systems such as application in geographic information, information management and fire fighting conducting, hot information researching, fire prevention facilities, fire personnel organization, and files management and so on. In the last, this paper prospects the application of 3S technology in the forest fire.

Yongjun Song, Yulin Li, Wei Zhang, Feng Wang

Land_Survying & Mapping Institute of Shandong Province, 9 Lishan East Road, Jinan, China, 250013

ABSTRACT

“Digital city” and “Digital land” have been becoming one of important and hot issues, and the key is to integrate and share the multi-source fundamental spatial data. Based on the achievements of “Digital city” and “Digital land”, the methods of fundamental data integration, organization and share of land source oriented digital city medium-sized or small-sized are explored, and the constructed mode of digital land oriented digital city is analyzed. The relationship among multi-source fundamental data at intercross node of “Digital city” and “Digital land” and the difference of the geometry and semantics of the same geographical entity are analyzed, and then the method of data organization of oriented object based on geographical features and the idea of multi-source data integration are put forward. Using the techniques of OGC and Web Service, the methods and technology of fundamental data sharing platform are researched, which have been tested by the prototype system. The fundamental data share and service mode is established to meet the requirement from the inside and outside of node. Some conclusions can be drawn that, the methods of different type data integration and entity relationship of the land data contribute to unifiedly organizing and representing the fundamental data. The fundamental data sharing platform provide the data and function service for the nodes inside and outside in convenient ways. The methods and models for basic data sharing, organizing and integrating are established, which can support the digital city and land informationzation, and also provide useful experience and lessons for similar aspects to research.

Pingli Wu∗, Senlin Li, Xuewen Wu

College of Environment and Resources, Fuzhou University, Qi Shan Campus, 2 Xue Yuan Road, University Town, Fuzhou, Fujian, P.R. China,350108

ABSTRACT

To relieve the environmental and social problems accompanying the rapid urban growth, the SLEUTH urban growth prototype model was migrated from UNIX into Windows to simulate the urban growth patterns in the Fuzhou metropolitan area during 1989 to 2003, and then predict the future growth by 2020. The historic datasets required for the model were derived from the remote sensing images (Landsat TM data in 1989 and 1996, ETM+ data in 2000; and SOPT data in 2003) by using remote sensing and Geographic Information System technologies. Two specific scenarios of different urban growth policies were designed to simulate the spatial patterns of urban growth. The first scenario represents a growth with restriction only on water bodies. The second scenario depicts a controlled growth with additional protections on grass-covered lands and agriculture area. The results show that in contrast to the first scenario, the second scenario well controls the build-up area under the area planned in current urban development policies, and is predicted to lead to more sustainable urban development with less loss of resource lands.

Yu-lin Li ^a, Yong-jun Song ^a, Jing Meng ^a, Lian-xinMa ^b, Na Yang ^c, Kun Liang ^c, ChuangWu ^c

According to the data characteristics managing by the Land Surveying & Mapping Institute of Shandong Province, the integrative storage mechanism of multi-database based on the standards and regulations ensures that the relationship can be established among data. Based on the definition of the workflow interface of the Golden Land Engineering and the analysis and necessary of the workflow for distributing database architecture, node alteration model for workflow using in the distribution environment is established, which describe the node alteration. The conception of hierarchical workflow is brought forward. The ordering rule is put forward based on the simplified regulations of node, which can implement the dynamic ordering for different nodes. The correct of the sorting is analyzed. The validity of the model is tested by being used in the land operation.

— A case study in Sudan

Weicheng Wu∗ and Eddy De Pauw

GISU/ICARDA (International Center for Agricultural Research in the Dry Areas), POBox 5466,

Aleppo, Syria.

ABSTRACT

Woodland is a major agro-forestry ecosystem in tropical Africa, of which the primary biomass productivity is heavily influenced by human interventions, such as slash-and-burn agriculture and deforestation. In turn, woodland biomass dynamics provide indicators to the rational and sustainable land use in this ecosystem, and its potential impact on climate change through the carbon emission/sequestration balance. These relationships highlight the central role of biomass production in shaping the human-environment interactions and the need to develop simple operational procedures for estimating woodland biomass production at large scale. This paper describes a case study in Sudan on the development of a remote sensing-based methodology for woodland biomass estimation in tropical Africa. As basic data 19 scenes of Landsat ETM+ and 6 frames of 72 MODIS 250m reflectance data were used. A literature review was undertaken to identify available and relevant approaches for woodland biomass estimation. This was followed by the development of specific regression models based on the calibration of actual tree canopy cover (CC) measurement with atmospherically corrected and reflectance-based Landsat vegetation indexes such as normalized difference vegetation index (NDVI), soil adjusted and atmospherically resistant vegetation index (SARVI), enhanced vegetation index (EVI), visible atmospherically resistant index (VARI) and wide dynamic range vegetation index (WDRVI). Among these, NDVI showed the best correlation with CC (R² = 0.8816) and was finally selected for woodland biomass estimation. The next step was to outscale the models developed from Landsat ETM+ images to the whole of Sudan using MODIS data; and then masks of woodland cover area (sparse woodland, woodland and forests) were extracted from the 2003 FAO Land Cover Map of Sudan. For each MODIS frame 12 acquisitions from July 04 to September 30, 2007 were used to generate the annual maximum or peak NDVI map, to which the model for biomass estimation was applied. The results were found fully comparable with those obtained by other authors using different methods and field measurements. Therefore the estimation results are acceptable and the methodology can be considered for operational use for woodland biomass characterization in other tropical African countries.

Norzailawati Mohd Noor∗ ,Mazlan Hashim

Natural Tropical Resources Information & Mapping (NaTRIM) Research Group

Faculty of Geoinformation Sciences and Engineering

Universiti Teknologi Malaysia,

UTM Skudai, Johor Bahru, Malaysia,81300

Tel: +607 5530666, Fax: +607 5566163

emails: norzailawati@gmail.com; mazlanhashim@utm.my

The theory of mathematics and modeling has long been introduced in the field of urban planning. Specifically modeling which was earlier introduced has started to develop by late 1960s. Modeling was used in various planning specialization such as economics, transportation, urbanization, ecology, and others. Remote Sensing application was also used informally in urban planning field concomitant with the launching of Landsat satellite in 1972. However, modeling which involves remote sensing in urban sprawl specialization in planning has only demonstrated its drastic development in early 1990s. Apart from monitoring, control and mapping of urban sprawl, remote sensing is combined with other application such as GIS and other urban planning parameters. Studies have also shown that remote sensing application is very flexible and is suitable with the ever changing and dynamic character of an urban system. The consistency in the remote sensing system that is able to track down any movement in land uses in a stipulated time gives aptness for the development of remote data sources and problems that arises in urbanization currently; subsequently giving a positive way forward for decision maker especially urban planners in Malaysia.

Qizhong Lin∗a,Qinjun Wanga, Hui Lia,Miao Liua,Qingjie Liua,Yu Chena,Shuai Lia,Mengfei Wangb

aKey laboratory of digital earth science, Chinese Academy of Sciences. #20 Datun Road, Chaoyang District, Beijing, 100101, China

bInstitute of Remote Sensing Applications, Chinese Academy of Sciences. #20 Datun Road, Chaoyang District, Beijing, 100101, China

Because space information techniques have priority in macroscopic geological exploration, they have been widely used in mineral prospect forecasting and exploration. Combining the study of rock’s reflective spectrum, this paper completes following works in Xi Zhungaer area, Xinjiang province, China: enhancing blind rock’s information, extracting mineral altered features, testing the spectral geological section, making core spectral column and constructing three dimensional model for mineral deposits. Results show that space information techniques play an important role in mineral exploration.

Xing-quan LIUa, Wei LIU*a, Jin-xing HUb

aSchool of Geosciences and Environmental Engineering, Central South University, Changsha 410083, China

bShenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China

As the continuing deterioration of global climate, urban typhoons, rainstorms and other natural disasters increase frequently, urban flood control and disaster mitigation has cropped up as noteworthy, which is related to the people’s personal safety and property and the implement of the sustainable development. And with the speedup of urbanization, this problem will extrude day by day. So it is crucial to study the problem of urban rainstorm waterlogging. In this paper, the study area locates at Shenzhen city in China, and the storm sewer model -Storm Water Management Model (SWMM) is used to calculate relative data of the urban rainstorm. The methods of subcatchments partition have been studied. GIS technology is not only used to manage massive data, such as meteorological data, GIS data and pipeline data, but also used to obtain massive parameters for the model. Remote Sensing (RS) technology is applied in land utilization classifications and water feature. The water depth in pipeline has been calculated, the depth of waterlogging area and the time of waterlogging lasts under different raining frequency has also been calculated, and the characteristic and the process of rainstorm water on the ground and in the pipeline has been analyzed. At last, At last, the methods of integrating GIS and SWMM have been studied, and 3D dynamic simulation for the process of rainstorm waterlogging has been realized. The results show that the application of GIS and RS technology in the process of calculating can extremely improve the efficiency of calculation and the precision of its results. The 3D dynamic simulation realized by integrating GIS technology and SWMM has offered a kind of prediction method with more direct-viewing and effective characteristics, which can be applied to establish flood-mitigation measures.

Zhongyuan Zhao∗ ^a,b, Hongtao Shen ^b

Wuhan 3D digital map system is a high-fidelity 3D space information system of metropolis. It takes 3 years to establish the system, with creative solution for some problem in technology and application. The article introduces its contents, construction strategy and achievements.

Zhao Zhongyuan∗^a,b，Gao Shan^b