【 Weak current College 】 five-dimensional digital application of the urban system

Five-dimensional information management system (5DSIM) more effective help real estate developer planning development, communications, management, operation of real estate projects, and further reduce the project construction and operating costs, and help improve the property value. Five-dimensional digital urban system as a five-dimensional information management system, as part of the city's business and management provides an enabling tool.

Since 2002, China's real estate industry are beginning to realize the importance of information technology, the industry started the informatization of consciousness is at an all-time high, developed rapidly. So far this momentum, but has a slight trending rational. Practice shows that many enterprises through the implementation of information technology enables optimized adjustment of corporate operations.

The wave of information have been pouring into the Chinese real estate industry, China's real estate Enterprise informatization is undergoing a transition from the sensibility to the rationality of the stage, the information also becomes the current broad trends in real estate business.

Since 1998, the world already have many of the city began to create a 3D digital city's efforts, such as 3D digital city model that maps the geographic information (GIS map), and Web based electronic map index (like GoogleEarth) to cities effective planning and operational management. But most such efforts as people are willing to, and often encounter the following problem:

(1) does not clearly define the three-dimensional digital value proposition of urban systems. 3D digital city in various aspects of urban operations have important applications, its value is in the city's various departments work appeared. If only a single sector application, causing the deviation of the data and information to make the number of missing urban system value play is restricted.

(2) the lack of a mechanism to deal with the reality of the urban environment of continuous change. 3D digital city should be a continuous update of the system, he can with urban development and continuous updating of model and model for linked data, such as roads, building demolition and reconstruction and renewal and maintenance facilities, and other information, should then 3D digital city model to performance.

(3) there is no clear definition of who is to bear on the created digital urban systems sustained management expenses. City departments overhead between the hook lead to sustainable management of digital city system hinder cost, thereby restricting the development of the system.

(4) the technical development of lack of foresight. Model data is to be demonstrated through various forms. In recent years, the software application from the desktop application software gradually converted to Web-based distributed system, the software industry's customer base industry gradually shifted to WEB browser clients, the manifestation of the model data to technical development change, otherwise it will keep up with computer network technology, the pace of development, which was eliminated by the market.

(5) in the model construction division in the lack of detail level, so that they can not be over time increase model details.

(6) the digital city's main focus solely on building external, so internal materials, space, space, and other information cannot be structured storage to your system, causing data chaos.

(7) a significant amount of human resources and time in the model construction, ignore the model system of internal data, resulting in a model system cannot provide for urban management information resources.

For the development of the digital city, so far the most effective efforts concentrated embodiment in drawing a two-dimensional map, GIS geographic information system. This system in the United States and Asia, many cities have applied. However, such a system cannot pass the crucial third dimension information, such as the height of the building, sunshine, in different floors in the building of the people, products, systems of vertical distance, vertical orientation, vertical, and so on. These requirements led to the now much based on laser scanning technology in the new 3-d solution development. But the vast majority are only able to provide approximate 3D buildings, and is not a precise model, the result is that these models more like a Hollywood stage props, rather than true digital architecture. Such a construction stage props approach has led to the application of these models, the limitations of and restrictions on the city to provide long-term value.

Below are a few aspects set out five-dimensional digital urban system features and applications.

1 five-dimensional structure of management information system

A five-dimensional "explanation: five-dimensional system = 3D geographic information model system + time + repository

◆ 3Dgeometry: keep updated 3D model

◆ Satelitedata: satellite transmission of geographic data

◆ Webinterface: web form interface

◆ GISdata: geographic information systems (GIS) data

◆ Tabulardatabases: table database

◆ CADdrawing: CAD architectural drawings

2 five-dimensional characteristics of the digital urban system

Five-dimensional model of the construction work processes follow the actual construction process, the workflow determines the highly accurate five-dimensional model of the system. Five-dimensional model of the system can over time convenient for the update. Five-dimensional digital cities built very quickly, and may act according to the urban development of actual priorities need to be built in stages. It allows the model to update the system at any time, and time to reflect changes in the urban environment of persistent, presenting the latest changes in urban development, in addition to timely update of characteristics, the five-dimensional system also has the following characteristics:

◆ Five-dimensional digital urban system solutions and development linked to the progress schedule

> * 5 d digital urban system solution is entirely by longitude, latitude and altitude for geographic location

◆ Five-dimensional digital urban system solution is made up of different components of the model, these component model can be "labelling", and links to related information. As each floor have different locations pipeline can be assigned a unique ID, the database according to the "ID" of the entire pipeline design drawings, maintenance records, material, vendor, and centralized management.

◆ Five-dimensional digital urban system solutions will follow consistent standards that provide micro-macro-city to internal details of model systems. Macro level, the five-dimensional digital city model to accurately display the city's planning, infrastructure construction, from the micro level, digital cities and specific to each House of the functioning of the various lifts, each commercial leasing, and even each Office micro-energy consumption, etc.

3 five-digit value of the urban system

Above these characteristics make the five-dimensional digital city can provide the following value:

3.1 for City Government:

(1) improving the urban operations and the efficiency of urban management. By establishing a can be used with all of the city administration information consolidated shared platform on urban operations and development. You can use a shared platform of city departments including the Department of economic development, urban planning and zoning, the transportation sector, the public security departments, parks and recreational facilities, public communication, construction approval and the tax department. In the case of Manhattan in New York, city departments through a renewal of the regional implementation of the digital urban system, you can see various stages, subway construction should be completed by level, each level of the building works are completed, and the greening of coverage. Various sectors through such a unified system of management, communication such as transportation to the neighboring building, architectural design of the programme on the impact of the overall landscape and so on. At the same time, individual departments can make through a unified system of its own sector budget, such as the Metro at every stage of construction materials and labour costs in the budget.

(2) a more effective means of communication in the real estate investment funds locked. Real estate investors can get through digital urban system more comprehensive, more accurate information, so easy to make decisions, select the appropriate investment strategy. For example, investors through a block of the observation of nature around the building, you can estimate this block blocks used as office buildings, hotels, residential or business potential of the property, through the surrounding architectural appearance analysis, you can build a virtual of initial construction to determine the height of the building, the body block. Using five-dimensional digital urban system, by real estate investment opportunities focused organization management, the City Government will be able to win more investors and better opportunities.

(3) higher levels of programming will increase the overall value of the city. Five-dimensional digital simulation of urban systems to various and directly related to the real estate value and give investors scene in return, this capability can be used to analyze the best combination of strategy, which in turn makes the property value maximization. As a city, various properties of the location of the building distribution, the distribution facilities, transportation convenience, the urban planning of specific factors to consider. Through the five-dimensional digital urban system, you can quickly make preliminary planning, planning programme evaluation, so that the scheme of the analysis to qualitative and quantitative analysis of at the same time, the programme has become more perfect.

(4) to increase the level of urban operations and controllable. Five-dimensional digital city system of unified information platform, allowing different departments in traffic management, urban facilities maintenance and safety emergencies, etc for better coordination. If the city now fires, water pipe rupture, traffic accidents, emergencies, through digital urban management systems, relevant to the data through a tiered storage, learned of the recent fire brigade, Depot, or transport sector, in water network incidents, you can determine which of the valve should be closed by the influence of water makes the minimum area, thereby reducing the loss of emergency events.
3.2 for real estate developers and investors

(1) enhance the efficiency and speed up government departments review and approval. Developers and investors to share information platform, providing with the entire city of construction phase for the solution of the same format so that the Government review and approval process to be accelerated.

(2) increase the level of control to the project. Five-dimensional digital urban system with five-dimensional digital building systems for seamless connectivity. Like the digital cities, digital architecture is a whole and all project partners information project of the same information platform, developers of the internal project team and external suppliers, service providers can use this platform.

(3) providing effective project marketing. Five-dimensional digital architecture form a comprehensive marketing basis, through digital building models to produce various multimedia can be integrated into the project's Web site, sales brochures, sales, and other marketing media. But the dynamics of the five-dimensional sales leasing system can let developers in all the time to view the effectiveness of the campaign. At the same time as the digital architectural model systems to seamlessly link to digital city model system, the system can generate arbitrary viewpoint, see building from the outside or from the view of the building to see outside.

(4) reduce the owner's expense. Five-dimensional digital building systems provides a project-related information for the central storage mechanism. By providing quick information search methods directly, digital architecture can be better management, analysis and monitoring, and the maximum efficiency of equipment operations and facilities management.

4 case studies

Five-dimensional digital city construction early start to the United States, following the adoption of United States cases of Screampoint company introduced its practical application.

(1) New York Manhattan area
R > Manhattan area has 75% of the region has a digital modeling, when there are new investors pick massif, you can analyze the surrounding plots of building nature to determine this block can be used for Office or hotel, residence, etc. By the look of the surrounding buildings, the conceptual design by first building a solid "box" represents the architectural appearance of the shape. To determine the initial architecture design.

(2) the SanLiTun area

SanLiTun area bounded by the Embassy district, South of the workers ' Stadium. SanLiTun area digital urban management systems, successful was the design of the North and South two pieces of area, North to high-grade commercial centre, the South is dominated by mass entertainment. Through the urban system of unified management and display, SanLiTun area successfully attracted foreign high-end brand entered, as developers bring a good return on investment.

(3) Shanghai Xintiandi area

Shanghai Xintiandi area through the reconstruction of buildings by quadrangle, the successful transformation of the Huaihai road to both preserve the traditional cultural and historical features, and meet the needs of the development of modern service industry of the city. Today, Xintiandi area has become the Shanghai foreign personnel and high level of aggregation, a world-renowned unified planning of the business district.

5 conclusions

By analyzing the above five-dimensional characteristics of the digital city and case, full shows five-dimensional digital cities among the real estate industry trends and prospects. In short, information is the industry development trend, the digital city management will serve as a tool for urban operations in the future to continue to develop.