The geometric primitive fitting is extremely important in tasks like 3D data simplification and automatic As Built. In this context, only few works address this problem in large structures data, where the point clouds are larger and more complex. Thus, the present work brings a methodology to deal with the problem, as well as a complete discussion about the state of the art in large structures data processing and in geometric primitive fitting. Resumo: O ajuste de primitivas geométricas é extremamente importante em tarefas como simplificação de dados 3D e As Built automático. Nesse contexto, poucos trabalhos abordam essa problemática em dados de grandes estruturas, onde as nuvens de pontos são maiores e mais complexas. Dessa forma, o presente trabalho traz uma metodologia para lidar com o problema, bem como uma completa discussão sobre o estado da arte em processamento de dados de grandes estruturas e em ajuste de primitivas geométricas.
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