Establishment of High Precision and High Resolution DTM
        The digital terrain model (DTM) uses data method to display the three dimensional landform topology changes. The digital surface model (DSM) is the three-dimensional data model of land surface (such as building and plants). In addition to the application of national land planning, it has high application values to people's livelihood, technology, and construction etc.

The data land topology model(Taichung Da Kung area)

The digital terrain model(Taichung Da Kung area)


The data surface model model(Taichung Da Kung area)

The digital surface model(Taichung Da Kung area)

        To enable our country entering the high-tech country community, to promote the utilization planning of national land, and to fully develop the effectiveness of the No.2 China satellite, at the same time look after all areas of environmental protection, technology and economy development, to achieve the sustained operation of national land, and to establish the goal of Taiwan as the Green Silicone valley, it is necessary for the priority set up of high precision and high resolution DTM and DSM etc. data, and provide them for use by all levels government to upgrade national competition capability.

The data land topology model

The datigital terrain model


The data land topology model over lay satellite image

The datigital terrain model overlapping satellite image


        To avoid all the requirement organizations repeatedly input manpower, material, and time to draw the required local area DTM, the Ministry of Interior ¡§high precision and high resolution data land topology model set up program was approved by Executive Yuan October 23, 2002 Yuan Tai No. 0910050634 letter. The Ministry of Interior will consolidate all resources to survey and produce the high precision and high resolution DTM for all Taiwan and provide them for use for the entire national construction plan and by all organizations.

LIDAR survey implementation

LIDAR survey implementation


The flood analysis

The flood analysis

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