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Pointscene.com: Explore Real World 3D Scenes from Lidar Data

61 点作者 anttiviljami将近 9 年前

3 条评论

dmlorenzetti将近 9 年前
Maybe I&#x27;m just a grumpy old man, but I really dislike this style of website that requires you to poke around for ages trying to figure out what it&#x27;s about, or what value it would bring me to use it.<p>Examples:<p>+ The title of this HN post promises it uses Lidar data, but one of the three examples I looked at had nothing to do with Lidar, and the other two didn&#x27;t mention Lidar at all.<p>+ That first example shows a drone-based measurement system, but it wasn&#x27;t clear the measurements were done by the website, as opposed to the data&#x27;s originator.<p>+ The second example I looked at purports to show a volumetric analysis of a concrete plant, but it has no description, and I don&#x27;t see any actual analysis taking place. On the other hand, my laptop slows to a crawl whenever I&#x27;m on that page, so it must be doing something. The comments on that page did promise that I can &quot;activate&quot; a map, but gave no indication what that means, or why I should want to do so.<p>+ The &quot;upload&quot; page states that in three steps I can start measuring my data, but it doesn&#x27;t give me any reason I should upload my data to somebody else&#x27;s website, rather than just take measurements myself. What&#x27;s superior about the website&#x27;s tools? What formats are supported? No indication, and apparently no way to find out unless I sign up and start trying to upload data.<p>+ The &quot;plans&quot; page implies, without making explicit, that if I upload with a free account, I will automatically share my data with others, but not be able to measure it, nor be able to download somebody else&#x27;s data. So let&#x27;s say I get a free account. What can I do with my data? Conversely, let&#x27;s say I pay for an account. What measurements can I make? How do I discover what data are available for me to download? And what indications do I have of the quality of the data (e.g., what&#x27;s the spatial resolution, what are the errors in the measurements, and have the data been vetted in any way to ensure there were no processing errors)?<p>So where&#x27;s the value?<p>Note I&#x27;m not saying there&#x27;s no value here. Maybe there is. But the website doesn&#x27;t do anything to make its value proposition clear -- unless I&#x27;m willing to poke around through enough of their examples, and the examples I looked at didn&#x27;t show me anything useful.
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ethbro将近 9 年前
Out of interest, I assume most of these are then mapped back to planar geometry for rendering. Does anyone have any links for the math &#x2F; current frameworks for this?
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edejong将近 9 年前
The Netherlands made available all the LIDAR points in the whole country and offered a point-cloud viewer of the data on [1]. The resolution is quite good, so you might want to have a look.<p>[1] <a href="http:&#x2F;&#x2F;www.ahn.nl&#x2F;pagina&#x2F;apps-en-tools&#x2F;3d-pointcloud-viewer.html" rel="nofollow">http:&#x2F;&#x2F;www.ahn.nl&#x2F;pagina&#x2F;apps-en-tools&#x2F;3d-pointcloud-viewer....</a>
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