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By Matt Freeman, Esri Writer
In Singapore, the GIS-based Land Information Network (LandNet) acts as an online GIS data warehouse for government agencies. This spatial data-sharing portal, created by the Singapore Land Authority (SLA), propels interagency information sharing to a high level by providing a real-time data exchange platform.
And a shared infrastructure such as LandNet helps the government save money. Estimates show that without LandNet, the agencies would have to collectively spend more than $9 million in development costs and $2.5 million for annual maintenance to enjoy the same capabilities and benefits that LandNet offers.
Using the data and online sharing capabilities that LandNet supplies, agencies can provide, via the Web, a myriad of information to the public: Property data such as whether a plot of land is publically or privately owned, detailed street maps that show the locations of buildings and parks, and dengue fever cluster maps that pinpoint where the risk of contracting the disease is highest.
A high demand exists today for spatial data to use when managing security, environmental hazards, and health risks and conducting land-use and resource planning and management. As the island nation of Singapore moves toward its goal of an integrated government, there has been an effort by public agencies to collaborate on projects using online data sharing.
In 2007, with assistance from a few key agencies that supply data, such as the Land Transport Authority (LTA), Urban Redevelopment Authority (URA), Housing and Development Board (HDB), and Building and Construction Authority (BCA), SLA launched LandNet. It's a Web-based system that provides online updates and allows agencies to view, access, and perform spatial analysis and upload and download data directly from Singapore's legacy Land Data Hub (LDH).
In essence, LandNet enables online data sharing among different agencies, even those that use different types of GIS systems-a feature that LDH alone did not possess. For agencies with their own customized GIS, LandNet acts as a virtual GIS data warehouse.
The LandNet system was an early adopter of the Esri ArcGIS Server map caching tools and its advanced, behind-the-scenes geoprocessing capabilities. LandNet was the first in the Asia-Pacific region to integrate GIS Web services with the Government Web Service Exchange (GWS-X). The marriage of the two allows government agencies to integrate maps into their Web sites without having to operate a GIS infrastructure.
LandNet makes it possible to view multiple types of spatial data-such as road lines, cadastral lots, landownership, and utilities data-using a Web browser, without the need for desktop GIS software. Even agencies without GIS can enjoy the use of spatial data without difficulty. Nonspatial types of data, such as socioeconomic statistics, can be layered easily with spatial data in LandNet. Satellite images can also be used as a backdrop for the spatial data.
LandNet's innovative features include access to data through a simple map browser with map view, query, and analysis tools. The map browser can be personalized based on user preference. Users can set the number and appearance of the layers they want to view each time they log in. LandNet also offers tools for map-based e-government. All these features allow government agencies to provide better online map services to the public.
LandNet makes available and promotes data and interagency connectivity nationwide. With its good interagency connectivity, GIS functionalities, and the ready availability of spatial data, LandNet has become the preferred GIS platform to support national initiatives and map-based applications in Singapore. LandNet has spurred the creation of many new applications and services such as
LandNet is maintained and operated on a cooperative funding model. Members share data as well as the operating costs. Agencies pay a yearly subscription and a download service fee on a pay-per-use basis. The income generated by the system is used to cover operating costs, and surplus income is returned to member agencies in the form of subscription fee rebates. The funding model's objective: ensure the program's sustainability and accountability.
Urban Redevelopment Authority
Building and Construction Authority
Land Transport Authority
JTC, Singapore's leading master planner, developer, and manager of high-quality industrial facilities and business parks
Housing and Development Board
Ministry of Environment and Water Resources
National Environment Agency
Public Utilities Board
Ministry of Home Affairs
Ministry of Defense
Singapore Land Authority