Mid range and long − range laser scanners are capture dense point − clouds froln engineering facilities . The captured point − clouds can be converted to smooth mesh models by using streaming operatiolls . 正 n this paper , we discuss a solid modeling systenl based on large sca 艮 e rnesh 【 nodels . When all enginee 畑 g faciliLy is 皿 easured by a laser scanner , cQmponents are scalmed only from the 弖 imited directions , and they 1 皿 ay be partial 王 y occluded by other components . To construct so 旺d models using such incon }plete mesh models , we introduce modeling and editing eperations based on the reflectance iinages , which can be generated from point clouds , We also show how to generate 3D n ユodels of standard parts . Key VVords ; Point − Based Modeling , Imuge − Based Modeli , Interactive Modeling