Find Poles using TerraScan

The “Find Poles” tool was introduced to the Railroad Tool Box with the release of TerraScan v017.018. While originally intended to automatically detect pole type objects along roads and railroads, which were collected using mobile or high-density airborne LIDAR data, this tool is designed in a manner where it can be used to detect a…

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Draw Plane Section Tool

A new tool has been introduced to TerraScan’s View Laser tool box called “Draw plane section” (Figure 1). This tool can prove very useful when vectorizing planar features from a dataset.  Using the previous viewing options (Draw section, etc.), it can be difficult and tedious to manually draw in a required line work at the…

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TerraScan: Tree Database Tools

Introduction Commonly, municipalities are responsible for the management of trees in public spaces, such as parks, the landscape of city buildings, along streets, and in road medians. These trees need to be located, identified, measured and monitored over time. With this information, the city can evaluate and sustain the health and safety of their trees…

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TerraScan: Label Clearance

A new tool has recently been added to the TerraScan Road toolbox (beginning with v017.024) called Label Clearance (Figure 1). This tool builds upon the set of tools using the distance attribute and adds more automation to extracting information from point clouds. The Label Clearance tool enables the quick and easy measurement and display of…

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TerraScan: Range Classification with Terrestrial Scanner Data

Recently, a customer had a question about using the ‘Classify by Range’ (TerraScan -> Classify -> Routines -> Classify by Range) classification routine with terrestrial scanner (tripod-mounted static scanner) data.  This tool classifies points based upon each point’s respective range from the scanner’s position at the moment of collection.  This tool was designed to improve…

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Classifying by Groups in TerraScan

Beginning in 2014, some grouping tools were introduced to TerraScan.  Those tools applied to mobile LIDAR applications as they were aimed at classifying moving cars and trees. In late 2016, additional grouping tools were introduced to enable a new method of conducting above ground classifications in airborne LIDAR datasets beyond the standard classification routines.  Prior…

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Setting the USGS Overage Flags in TerraScan

Introduction For many years users have been working with the concept of ‘cutting overlap’ in LIDAR data production. With the onset of LAS v1.4 and the USGS LIDAR Base Specification, the way in which this concept is implemented has significantly changed.  Specifically, USGS standards require a change in the way overlap points are managed and…

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Control Point Statistics in TerraScan

Terrasolid software offers a variety of ways to gauge the accuracy of LIDAR and imagery data.  From using control points to determine the vertical accuracy of a ground surface, tie lines to measure and correct the mismatch between overlapping flight lines, and tie points to correct aerial imagery positions, each of these tools provide the…

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Waveform Data in TerraScan

Many users of LIDAR use discrete return systems for their production, however, many systems are capable of capturing the full waveform of the energy returned from an outgoing laser pulse. The figure illustrates a laser pulse directed through a tree.  Different portions of the laser energy are backscattered/returned by various surfaces: branches, twigs, leaves, and…

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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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