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THE DESIGN AND IMPLEMENTATION OF SAR REFERENCE IMAGE
INFORMATION INSURANCE SYSTEM BASED ON ARCSDE
Y.F. Ling a ’ b ’\ G.M. Huang b , J.X. Gao a , Z.Zhao b , L.Pang b
a Chinese Academy of Survey and Mapping, 16 Beitaiping Road, Beijing -
lingyufei2008, huang.guoman, panglei.mail@163.com,zhengzhao@casm.ac.cn
b School of Environmental and Spatial Informatics, CUMT, Xuzhou -jxgao@cumt.edu.cn
KEY WORDS: SAR Reference Image, Spatial Database, ArcSDE, Information Insurance System, Spatial Analysis
ABSTRACT:
This paper aims at the characteristics of the data source, the requirements of the database establishing, studies the theory of spatial
database, ComGIS and some relative key technique, discusses the pattern of database establishing, the organizing and storing mode
of the data. Then the logical and physical model of SAR reference image database is proposed. The prototype of the information
insurance system is designed and implemented finally. Oracle and ArcSDE is used to build the SAR reference image information
insurance system. C/S pattern is adopted. The design of database is based on ArcSDE technology, and the development of the
system is based on VC and ArcEngine. The final system achieves the requirements. It provides efficient concurrency accessing
mechanism, fine security mechanism and flexible index mechanism. It can build quick index, manage spatial data and property data
integrity in a transparent way, achieving data updating and sharing. SAR reference image information insurance system satisfies the
needs of data import and update, data browse, spatial query and analysis. Data in the system can also output to be the given format to
support for load preparation. Ultimately, a certain target region is taken for example and it shows that the design scheme is
practicable and has some instructional meaning.
1. INTRODUCTION
With the development of remote sensing and photogrammetry,
spatial data with abundant information can be obtained easily.
Data increases geometrically as a result of the improvement of
sensors. Synthetic Aperture Radar (SAR), a kind of imaging
radar, is an active illumination system using microwave. Its
appearance makes up the limitations in difficult situations by
optical sensors. So SAR is widely used in the projects of water
conservancy, agriculture, oceanography, geology,
environmental monitoring etc. Particularly, SAR can provide
unique images representing the electrical and geometrical
properties of a surface in daylight or at night in nearly all
weather conditions without national boundaries limitations, and
with high resolution; it can penetrate through certain veils,
disguises and blindages. So it is used widely and successfully in
military to support for missile guidance.
In recent years, many scholars are researching on SAR image
processing and reference images preparation. As the data
increases, more and more information is accumulated, whereas
it cannot be managed efficiently. Although there are some
commercial DBMS for images, such as TarraServer(Li J. et al,
2005), but there is not a ready-made system or model that can
satisfy the requirements of data organization and management
of target regions for SAR reference images. Therefore, to
establish a database for reference image preparation and missile
guidance is absolutely necessary.
After analyzing the characteristics of the data source, the
logical and physical model of the database is proposed in this
paper. Then the prototype of SAR reference image information
insurance system based on GIS is implemented. The data can be
visited and managed by asynchronous buffering, spatial index,
and distributed management. The system is benefit for data
management and updating. It can serve as the data source
guarantee for battling, and can also provides decision making
support for headquarters, which makes the information
insurance develop towards systematic, automatic and intelligent,
and plays an important role in our national defense.
2. DATA ORGANIZATION AND DATABASE
ESTABLISHING
Database is the core of the information insurance system, which
including multi-source data with large quantity. High security
requirement for the data is recommended because it is used in
military. How to build a database to organize these data
reasonablely and efficiently will directly influence the
capability of the system.
2.1 Spatial Database Establishing
Most softwares do well in vector data management. However,
raster data is managed and shared by file-based system for years.
With the growth of the database in size and number of users,
file-based management shows the shortages in data security,
concurrency access and spatial index. As DBMS capability has
evolved into more powerful technology that could support
complex data objects, larger queries, and stronger transactional
support, using DBMS for data management has become much
more practical. Considering Oracle is open completely that can
be run on nearly all platforms, it has the ability of parellel
processing and is scalable with high security(Wen H., 2005), so
it is used to be as the database management system. ArcSDE,
the GIS gateway to DBMS(ESRI, 2004), can be seemed as a
continuous spatial data model. It can fuse spatial data into all
commercial DBMS, and provide effective services for spatial
and non-spatial data. Accordingly, the information insurance
system of SAR reference images uses Oracle and ArcSDE to
build it. The design of database is based on ArcSDE technology,
and the development of the database is based on VC and
ArcEngine. Data is organized based on GeoDatabase, thus the