Products - TerraMatch

TerraMatch - Calibration and Strip Adjustment

>> TerraMatch x64 Release Notes    >> TerraMatch User's Guide

>> Overview of functionality in TerraMatch and TerraModeler UAV

TerraMatch is a sophisticated tool for improving the accuracy and quality of the raw laser point cloud. It compares laser data from overlapping flight or drive paths and calculates correction values for the misalignment angles as well as xyz location errors. The comparison and correction value calculation can be either based on surface matching or on different types of tie lines. Tie line matching comprises points or lines on horizontal, vertical or sloped surfaces that can be used for matching flight/drive paths to each other, but also known point or line locations that enable the adjustment of the laser point cloud to control measurements.

Especially in terrestrial mobile laser scanning, the mismatch between overlapping drive paths usally changes over time during a surveying campaign, depending on the quality of the GPS signal on different locations. This requires a fluctuating correction solution which can be achieved with control measurements and TerraMatch tie lines.

TerraMatch is also used for misalignment angle calibration which should be checked and possibly improved at the beginning of data processing. For this purpose, data is collected on a specific calibration side which offers a point cloud dedicated for the calibration task to the software. If the system includes several laser scanners, the calibration involves scanner-to-scanner matching.

TerraMatch must be accompanied by TerraScan.

TerraMatch UAV

TerraMatch UAV is a lighter version of TerraMatch. It is dedicated to users that process only point clouds collected by Unmanned Airborne Vehicles (UAVs, also called Drones). UAV systems produce relatively small point clouds from a low altitude. The system is more unstable in the air. Often, less capable/expensive hardware is used which leads to a higher inaccuracy level of the raw data. Therefore, the improvement of the data accuracy by eliminating boresight misalignment and positional inaccuracies caused by a bad trajectory solution plays an important role in the processing workflow. The UAV version of TerraMatch is recommended to be used for processing point clouds up to a few hundred million of points (depends also on hardware conditions).

TerraMatch UAV does not have any project capabilites. Tools can be performed on points loaded in memory but not on project level.

Tools/Commands without project option
  • Apply correction
  • Tie lines/Import points
  • Tie lines/Search tie lines
  • Tie lines/Search cloud-to-cloud
  • Find match
  • Find fluctuations
  • Move forward/backward
  • Measure match

TerraMatch UAV is available only in a bundle with other Terrasolid UAV software versions, such as TerraScan UAV, TerraPhoto UAV, and/or TerraModeler UAV. TerraMatch UAV must be accompanied by either TerraScan UAV or TerraScan.

 

calibration side example

tmatch_calib

adjustment of a building corner

tmatch_corner



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Last update on this website: 08.10.2018
Last update on this page: 21.03.2018