Monday, April 30, 2018

Better point cloud visualization in Cloud Compare with Eye Dome Lighting shading

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Typically, LiDAR point clouds are displayed as a mass of colored points without perception of depth in a viewer. This can be hard to visuali...
Monday, March 26, 2018

Resolving Maven "trustAnchors parameter must be non-empty" error

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I encountered this Maven error on a new Ubuntu 18.04 system while trying to perform a mvn build on a Google AppEngine project. A screens...
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Wednesday, March 7, 2018

Fixing "Cannot resolve symbol Theme" error in Android Studio

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If you have ever encountered unusual " cannot resolve symbol " messages with regards to Android resource XML files (an example is ...
Monday, February 26, 2018

Use PDAL to register a point cloud to control points

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Sometimes, some 3D LiDAR point cloud data are not at the correct location or they are not aligned with other point clouds. When this happens...
Monday, February 19, 2018

WebApp for calculating the 4x4 transformation matrix between 2 corresponding sets of 3D points

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In working with 3D point clouds, one of the task may be to register or transform the point cloud to known ground control points (GCPs) on ...
Monday, February 12, 2018

Displaying WKT geometry string in QGIS with getWKT plugin

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If you want to display the Well Known Text (WKT) string of a selected geometry in QGIS , there is a plug-in getWKT that can be used for thi...
Monday, February 5, 2018

Find the 3x3 transformation matrix given a set of 3D points using Octave

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I have 2 corresponding pair of 3 measured 3D points - one original coordinates (let's call as X) and the other destination or reference ...