What is "indexing" in Recap?

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Darius_bd
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What is "indexing" in Recap?

Post by Darius_bd » Mon Feb 18, 2019 2:06 pm

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I've been playing a bit with the Leica Register 360 and is an interesting workflow but I dont see it doing what Recap was doing, that is to "index" scans. Does someone knows exactly what is this step in Recap software, when importing new scans and after registering them?

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Re: What is "indexing" in Recap?

Post by gregorygagnon » Fri Sep 27, 2019 2:40 pm

Hi Darius,

According to AutoDesk, Indexing is "The process of structuring a raw scan file so that it can be opened in a CAD product" (https://help.autodesk.com/view/RECAP/20 ... 816B644A48).

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Re: What is "indexing" in Recap?

Post by smacl » Fri Sep 27, 2019 3:11 pm

Indexing a point cloud typically involves placing all of the points in an octree or similar spatial structure so that they can be displayed quickly based on your current resolution and searched quickly using various filters.

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Re: What is "indexing" in Recap?

Post by Scott.Warren » Fri Sep 27, 2019 3:23 pm

My guess would be the 'Indexing' is Recap taking all the point data and organizing it in a way it feels best able to manage the data.

A list of point values in arbitrary order might be good for some applications, but not all. So if you sorted your data based on other criteria, like sorting the data into blocks/chunks, you might be able to work with the data more efficiently. if your data is sorted (indexed) into localized chunks/blocks, you can display the data more efficiently by only loading the chunks (index) of data in your view, and not load/sort through 1 big un-sorted (un-indexed) list of point data.

LAS, E57, PTS, PTG, etc, all sort the data differently, some are sorted by individual scan setup, some separated into blocks/chunks, and some are just a wall of unorganized N,E,El (X,Y,Z) data.

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