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Evolution of TGOS Portal

     The service of supplying geospatial data is the next focus of data establishment. After the data is produced, it is necessary to maintain, update, and enhance value added distribution to ensure the accuracy of the data and to display the utilization value of added data. Consequently, since 1998, the Information Center of Ministry of the Interior has been planning the tasks related to data supply services construction. This work can be divided into three stages:



  1. Stage 1 (prior to 2000)
    1. Instruct relevant government authorities to draft related supply services regulations, providing them for using governmental and private agencies in application.
    2. Establish the GIS Clearinghouse as the inquiry and service portal for NGIS data. This makes it convenient for the government and private sectors to avail of the data and solve the problems brought about by the unique nature of service provided by the specific government agencies or inadequate resources of data supply services. This has achieved the initial goal of the sharing of NGIS data.

  2. Stage 2 (from 2001 through 2003)
    1. Integrate the NGIS databases separately constructed by various agencies.
    2. Establish NGIS metadata query system and NGIS service portal.
    3. Speed up the supply services of NGIS data.
    4. Promote the development of value added services for NGIS data.

  3. Stage 3 (from 2004 through 2008)
  4.      Draft the model for data warehouse, data mining, and others. At the same time, study data standards, common platforms, legal systems and other complimentary factors to establish a more comprehensive TGOS portal and highlight concrete results. Major promotion points include:


    1. In 2004, the integrated system of TGOS portal was established. Its tasks include:
      1. Develop and build a spatial data warehouse system integrating the existing geospatial data resources of various government agencies, choosing Taichung City Government, the Construction and Planning Agency of Ministry of the Interior, and the Urban and Rural Planning Office of the Construction and Planning Agency as the three warehouse supply model nodes, building an interface for the integration system of online geospatial data services. In addition, with the Taichung City Government and the Construction and Planning Agency of Ministry of the Interior as the model nodes, implement the feasibility verification of the Web Map Service (WMS), to successfully carry out the overlay of web geospatial data services offered by the two abovementioned agencies in the same area at the end-user point, meeting the functional demand for cross-platform geospatial data integration and data collection.
      2. Look back at the status of the promoting metadata construction on the domestic front and study the metadata and index inquiry systems abroad. One point of reference presented is the framework of the Geospatial One-Stop (GOS) from the US. Establish a metadata management system and provide online registration of maintenance and batch files (XML files of metadata) for various node agencies and other upgraded maintenance functions.
      3. Draft standard operating procedure (SOP) for WMS of the TGOS portal. Set up promotion plan and technical results verification of the WMS based on the partners, and categorize the partnership and standard operating procedures of the WMS offered by partners.

    2. From 2005, the Information Center, Ministry of The Interior, has been continuing with the tasks from the prior stage, expanding system functions and constructing the integration of geospatial data and partners. Major work points include:
      1. Centralize the storage of digital geospatial data which the central government and other agencies are willing to release or are otherwise free and open; data shall be in XML file format for online downloading.
      2. Set up the integration of geospatial data and partnership. For this part, the Academia Sinica, the Water Resources Agency of the Ministry of Economic Affairs, the Central Geological Survey of the Ministry of Economic Affairs, the Institute of Transportation, MOTC, the Forestry Bureau of the Council of Agriculture, the Soil and Water Conservation Bureau of the Council of Agriculture, the Taipei City Government, the Tainan City Government, and the Chiayi City Government have been chosen as the main targets for partnership promotion and assistance.
      3. The system function expansion and model procedures for this year include the following items:
        1. Study the Geospatial One-Stop of the US Geological Survey (USGS) to update and expand the metadata of the TGOS portal; the metadata uses metadata cache for storage; provide form entry, XML upload, automatic regular harvesting to acquire the XML file within the Web Accessible Folder (WAF) for updating.
        2. Choose two partners (the Taichung City Government and the Water Resources Agency of the Ministry of Economic Affairs) to serve as model nodes for the Web Feature Service (WFS); build a WFS alliance model and assess, evaluate, and verify the feasibility of the current Web GIS software platform and WFS support; write standard operating procedure (SOP).
        3. Develop and construct financial and material logistics systems. With the choice of two partnerships (The Institute of Transportation, MOTC and the Taichung City Government) to proceed with online application, payment, and downloading of original files to serve as operational models.
        4. Include related authentication functions of PKI identification, agency/organization identification, and other single entry solution system.

    3. Starting from 2006 and 2007, in addition to continuing TGOS portal partnerships promotion, the Information Center, Ministry of The Interior, has been planning for the integration of the SOA, as well as analyzing and planning for establishing a system for geospatial data supply and integrated application platform according to the current needs of the land monitoring, land planning, land restoration, disaster prevention and rescue, and other major national infrastructure projects. The plans were initially carried out on a small scale, with the anticipation of eventually being able to take full advantage of the application benefits of the geospatial data as well as highlight the performance of the NGIS promotion at the later stages.

  5. After 2008 
         The Information Center, Ministry of the Interior, is to step up the promotion of TGOS portal partnerships, and address the issue of sustainable operations, reinforce the value added applications of geospatial data mapping, and improving the data and process services of SOA.