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笔者评:SmartGeoMetrics是点云软硬件集成应用商,提供点云获取设备租赁培训咨询、重建承包等业务,近日该公司采 用点云技术重建地下年久失修的水库,以协助对泄露问题的解决。在发达国家,需要点云重建这种测量技术以协助对大型 建筑工程的精准修复等工作。
Houston, TX — There are countless inaccessible places in the real world that can be brought into the digital world through 3D data capture. SmartGeoMetrics specializes in helping clients achieve this goal with top of the line hardware, robust and cutting edge software, and experienced personnel. In 1927, the City of Houston built its first underground drinking-water reservoir at the Water Works on Sabine Street. Decades later it started to leak. The leak could not be found, let alone patched. The reservoir was drained and remained out-of-sight and largely forgotten. In 2011 the Buffalo Bayou Partnership (BBP) took possession of the Water Works as part of Buffalo Bayou Park Development. In the course of due diligence of the property, they entered the reservoir through a small hatch and descended a single ladder into its cavernous space. What they encountered was beyond their expectations. Light fell into the
space from the entry hatch as well as two larger equipment hatches. It reflected off of six inches of water that covered the floor of the space shimmering on the walls and illuminating row after row of towering columns. Each step echoed and voices were amplified, claps of the hands reverberated for what seemed like eternity in this room large enough to hold one and a half football fields. The reservoir was dubbed, "The Cistern." A space like this begged to be shared. However, the logistics required to enter the Cistern are extensive
and complicated: security clearances, confined spaces certification, an evacuation winch, a safety lanyard, gas monitor, hole watch, liability releases, scheduling access… How could people safely experience it? SmartGeoMetrics (SGM) heard of the "Cistern" through a bit of water cooler talk as their offices are neighboring those of the Buffalo Bayou Partnership (BBP). SGM's solution was to digitize the entire space as well as the surrounding features above ground. This would allow the BBP to share and promote their newly discovered assets through a myriad of digital mediums. ? While making digital models of real world places has been possible for some time now, it was akin to retyping a hand written letter. The content was successfully recreated but something was often lost in the digital translation. That all changed when scanners were invented. Users could quickly scan a document and either view the original or convert it into an editable format. This same transformation is now occurring but with real world environments instead of sheets of paper. The equivalent of a JPG of a document, or the raw data format for 3D Imaging is the "Point Cloud". Like the JPG in 2D scanning these point clouds can be viewed and give users an accurate representation of the captured environment. Point clouds can also be used to create editable formats like CAD models, meshes, or NURBS models. The key advancements are not just the speed increases or incredible
improvements in accuracy over traditional "artistic" modeling but the concept of having a single data source from which multiple computer applications can data mine. From one data collection campaign you have a perfect copy of the environment that is at the mercy of whatever applications you have! Create architectural drawings, use it as the environment for a video game or movie, make fly-through videos, print 3D models, build Building Information Models (BIM) for asset management, make VFX models, and more. Nothing exists in a vacuum, why model in one when you can design, study, manage, or create objects in the environment in which they will exist.
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