Integrated modeling of indoor and outdoor pipelines based on Multipath and CSG

Abstract: In view of the current three-dimensional modeling of underground pipelines, indoor and outdoor pipelines are often constructed separately, resulting in inconsistent geometric and semantic expression of solid models, and their data formats need to be converted, which makes data easy to lose. An integrated model construction method for indoor and outdoor pipelines based on Multipath and CSG is proposed. This method is that the python script on the ArcGIS platform is used to call the relevant methods in ArcPy to obtain the 3D information of indoor and outdoor pipelines and automatically generate the 3D solid pipeline model of indoor and outdoor integration in batches firstly through in-depth analysis of the characteristics of the Multipath data model, and then generate the indoor and outdoor integrated 3D hollow pipeline of meeting the actual demand by Combining with the CSG method. This method not only realize the automatic batch generation of indoor and outdoor pipeline integrated models, improves the modeling efficiency, but also effectively solves the inconsistency of geometric and semantic expression of pipelines, the separation of indoor and outdoor pipeline modeling, and the loss of model data conversion. Finally, the gas pipe network in the underground pipeline is taken as an example to construct the 3D model of indoor and outdoor pipeline integration. Compared with the traditional modeling method, the modeling cycle is greatly reduced, the modeling cost is reduced and the modeling efficiency is improved. The feasibility of this method is verified.