Research On Key Issues Of 3DGIS In Fumeng County Based On Fusion Of Real Scene Model And BIM

The three-dimensional real model is a surface model,which is suitable for large-scale and highprecision three-dimensional display,but the disadvantage is the lack of fine expression of the interior of the building,which separates the interior and exterior.BIM Technology makes fine 3D modeling for the interior of the building,and has rich building information.The integration of the two really realizes the integration of indoor and outdoor browsing,management and analysis.Based on the oblique photogrammetry technology and the real scene 3D modeling method,the3 D real scene model of Fumeng county is built by using the Fei Ma D2000 UAV,and the city's macroscopic display and structured query are realized according to the monomer of the building and the three-dimensional property right.Combined with building BIM model and indoor pipeline system,the indoor and outdoor integrated browsing and structure information query of buildings are realized,and the indoor pipeline is connected with the underground pipe network,which not only makes the pipe network structure visible,but also provides data support for pipeline analysis.Through the secondary development of SuperMap,the above multi-source data are integrated into the map scene and spherical scene.Finally,a 3DGIS platform of Fumeng county is established,which integrates the indoor and outdoor buildings,visualizes the three-dimensional pipe network above and below the ground,and has good interaction and real-time performance.The two-dimensional system is combined with the three-dimensional system to realize the browsing of the two-dimensional and three-dimensional scenes,information query,calculation and two-dimensional and three-dimensional linkage,Asset and equipment group query management and burst analysis,buffer analysis,rescue analysis and other two-dimensional and three-dimensional analysis functions.The results fully show the real three-dimensional overall urban model of Fumeng County,provide analysis and visual display platform for urban planning and construction,emergency rescue and scientific management,and provide reference value for the construction of digital city.There are 102 pictures,11 tables and 50 references.