PIANC Smart Rivers 2022

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BIM，GIS and Oblique Photography contribute independently in engineering field. practice of technical integration is lack. BIM Technology focuses on building information on engineering scale, GIS technology focuses on resource information on urban and watershed scale, and oblique photography aims to reflect the real scene of specific area with high precision. Technical integration will effectively expand the radiation range of engineering construction information, effectively assist engineering decision-making, help optimize the construction plan and improve the quality of engineering construction. 
The author carries out a research on the integration of BIM Technology, GIS technology and obliqe photography, analyses their application status, technical characteristics and application fields, describes hardware and software platform needed, key technology calculation method during integration. Finally, five conclusions are drawn: 
(1)The integration of BIM, GIS and Oblique Photography can be divided into four steps: BIM model creation, 3D real scene model creation, data fusion and achievement application.
(2) The creation of BIM model usually needs to be completed by professional software; The 3D real scene model needs high-definition image data obtained by Oblique photography to be formed through a series of operation processing, such as control measurement, spatial encryption, triangulation, texture mapping and so on; BIM model and 3D real scene model are used as data sources to realize the integration on GIS platform. (3) BIM model needs to be lightweight and the real scene model needs to apply three-dimensional cache technology and generate corresponding configuration files before fusioned on GIS platform.
(4)The integretion of  BIM, GIS and Oblique photography technology can effectively combine macro scene and micro engineering, show the construction effect of the project, significantly improve the visualization of the scheme. At the same time, linking construction information with the model enhances the intensity of information management and is conducive to better serve the decision-making and implementation of the project.
(5) In the application of layers and maps should be used reasonably, and appropriate mosaic methods should be selected to improve the quality of final results.
Based on the key water juction project of Shuangqia, the match of BIM model, diorama and spatial data, model data visualization display and interaction, engineering roaming are realized under the GIS platform. which will provide a demonstration experience for the application of BIM, GIS and oblique photography in waterway engineering and give support for the realization of urban and watershed level digital project management.

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