Page 2 of 2 Previous Land price section assistance and application Land price evaluation, taxation and compensation for land levy are all inter-related, and are important sources of finance to government. Land tax is local tax in R.O.C., so it contributes to local finance and popularizes local construction. For formulating fair and reasonable land taxation, preventing infringement into people’s rights, and steadying the taxation sources, it is necessary to build a set of reasonable operating procedures, and assist officers in carrying out the operations. This operation (Figure 3.) uses land price section map and digital cadastral map as main feature data, overlays topographic map, urban planning map, etc., and edits the land price area boundary using computer (Ho, 1999). The method is roughly the same as land price estimation, but it is assisted by computer drafting technique to improve the expression of land price section, and also aid the annual land price appraisal meeting. Due to the integration of feature and attribute database, the efficiency of parcel land price calculating function is improved substantially, and facilitates data preservation, management, search and readability.  Fig 3 Land price section divided application system (From: Kaohoiung City Government, R.O.C.) Land price information and public service application For controlling land price effectively and promoting transparent land price strategy, Taichung City Government has employed the internet (Figure 4). The WWW is used to offer integrated Web-GIS for developing ”Real Estate Trading Instance from Land Investigation and Estimation” and “Land Price Management Operation System”. These could be surfed and land price spatial information can be retrieved by means of interactive search. The system utilizes cadastral map, administrative region map, zoning map, important land-marks, buildings, door plates, and road map. The system integrates the database of “Land administrative integration system” with “Land Price Section Divided Application System” to offer citizens a free, instance, and user-friendly service about the real estate trading price, and the citizens can also obtain public facilities information from the system. In a shift towards the realization of the objective of e-governance, the land price information on line system and automatic report analysis and production system are developed.  Fig 4 Land price inquiring system offers greater convenience to the citizen. (From: Taichung City Government, R.O.C.) 3D building management 3D building management system (Figure 5) uses the existent cadastral map to produce the 3D building models. The system links the 3D building models to their information, and employs GIS and VRML (Virtual Reality Modeling Language) to depict the 3D image of building. The web surfer can see the 3D virtual world, and simultaneously search the attribute data. Building information includes images and the completed layout when the building license was issued, and the information would be applied to architecture management. It would be combined with the cadastral data to produce the synthetic building data, and expanded to urban planning, city design, and residence policy analysis.  Fig 5 3D building management system (From: Taipei City Government, R.O.C.) Public works management In road construction management, the construction is according to the planned road by urban planning and is budgeted by local government year after year. However, the construction process involves an inextricable operating procedure, like the proposal, on-the-scene survey, checking and ratifying, expenses application, land acquisition, compensation granting, constructing proceeding, etc. Nowadays, the management system offers the information for the related directors and officers to build, search, estimate the land acquisition fee and control the road data via Web GIS technology. A mobile GIS is developed to offer search function and reports using PDA as hardware. Monitor in Home Land The home land conservation authorities are on the look out for a comprehensive solution to the problem of illegal landuse. However, since the slope land is too vast to manage and the authorities are understaffed, it is impossible to overhaul on-the-spot. “Slope land Management and Satellite Image Monitoring Program” integrates GIS, RS and GPS to check the basic information of questionable translation area by image analysis. The function of satellite monitor is separated into 2 parts: questionable translation area of satellite images determination and investigation management. The former one focuses on the analysis of questionable translation area through satellite images, and the latter one focuses on verifying on-the-scene and slope land management (Chou, 2003). The research plans to verify on the spot, download the questionable translation area data to PDA (with Slopeland Supervision On-the-spot System) which integrate the cadastral information and to investigate ‘land registration data’, ‘ownership or obligor data’, ‘land use behavior’, ‘verifying results’ and so on, record the results to questionable translation area verifying form, and take pictures. Prospects The computerized cadastral data linking with geospatial technology itself still has some inherent limitations. These include the problem of integration of different coordinate systems, scales, precise, surveyed and mapped methods, storage formats, and the matching problem between boundary adjacent cadastral sections, etc.. Besides, the problem of integrating different databases is also critical. The only way to accelerate the rate of progress of cadastral resurvey in Taiwan is by means of the numeric method, and the resurvey works should integrate the control survey system with topographic map to make the data match so that it can be applied extensively. In addition, the development and integration of new technology development are also crucial to improve the power of geospatial technologies, through distributed computing ability, computer hardware development, network technique progress and other information processing technology are integrated to improve the real-time processing ability and increase the efficiency of management, it will contribute to promote the application of cadastral information linking with geospatial technologies.
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