Cookie-cutting by Polygons

Sometimes it may be useful to “cookie-cut” LIDAR points by polygons. The polygons may represent rectangular grids, such as quarter quads, or can be irregularly shaped. Cookie-cut allows you to use a shape file of one or more polygons. An attribute from the Shape file can be used to name the various files. This is set…

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Exporting LAS files failed (22684)

Symptom: While exporting data from LP360 using the Export Wizard a COM Exception is encountered stating, “Caller’s Message: Exporting LAS files failed. (22684) Exception Information: HRESULT: 0x80004005 Unable to retrieve extended COM error information.” Probable Resolution#1: Do you have any LAS files that contain only a single point? If so, remove that file and try…

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Command Line Executable for Point Cloud Information

A quick and basic way to get information about projection information, GPS time and the number of points within an LAS file is to run the LDDump executable. The program is designed to pull the information directly from the public header block of the LAS file, provided the header has been correctly populated with the…

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Rut Analysis using Terrasolid

One of the many applications that are suited to the use of mobile LIDAR analysis, is the identification and measurement of ruts and potholes. Here we will discuss the preparation of the data, ways to visualize rutting, the classification of pot holes, and the production of road section parameters. As with any kind of LIDAR…

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LP360 and Topolyst Feature Analyst

Feature Analyst is an exciting new tool that will appear in LP360/Topolyst 2016.2.  To motivate this discussion, I will provide a synopsis of a few use cases for Feature Analyst here.  A detailed look at these cases is presented at the end of this article.  Examples of tests you will be able to perform with…

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