Layer Manager

The Layer Manager tab allows you to create different layers depending on the data to be analysed.

Layers improve the speed at which point-cloud data is processed, and allow you to prepare data before you apply filters and analyse point-cloud data.

Frame Set layer

A LiDAR systems generates a 3D map of the environment by scanning horizontally and vertically. Each map is known as a frame.

Point-cloud data is viewed on a frame-by-frame basis; by default, Layer Manager opens the point-cloud data in a Frame Set layer ().

Right-click on a Frame Set layer to display the following options:

  • Rename Layer: Opens the Rename Frame Set dialog

  • Load From File ...: Loads a previously saved layer

► For information on how to create and save layers, see "Save and load layers".

Point layer

Millions of points are generated by LiDAR sensors which can cause Purepoint to become slow when you rotate and check the view. When you rotate your view, up to 90% of the points are not displayed. For example, a frame with 1,600,000 points can decrease to 81,000 points when rotated.

Point layers () gather point-cloud data from multiple frames in a single layer which allows for smoother data transitions.

Information

Point layers allow point-cloud data to be processed up to 20 times faster than on a Frame Set layer.

Raster layer

Raster layers () are 3D images created from geo-referenced data. Raster layers comprise a matrix of data cells organised in a grid format where each cell contains a value that represents data, for example, height.

Vector layer

Vector layers use lines, points, and polygons to represent environmental features:

  • Lines represent roads, canals, and pathways

  • Points represent trees and rocks

  • Polygons represent more complex features, for example, buildings

Interaction with filters

To enable custom manipulation and point-cloud data analysis, Purepoint allows you to:

  • Access and modify a point-cloud sequence

  • Add tracks and geometric objects to the visualisation

  • Execute filters and filter chains, see "Filter chains"

  • Input parameters to filters

  • Export modified point-cloud data, geometric objects, and tracks