What is a point cloud, and what are some uses of it?

Answer

A point cloud is basically an array of point data within a GIS which are used to describe or represent a surface of some kind. For example, a three-dimensional object can be portrayed via the use of a point cloud where the points represent vertices of a polygonal surface. The point cloud can be created with a 3D scanner or generated on a computer mathematically.

The points in a point could also represent elevation points on the earth's surface. In the case of elevation points, they can be expressed in two-dimensional space or three-dimensional space, and can come from survey data, LIDAR data, or even stereo photography. All point clouds are referenced to specific coordinate systems.

Updated on April 8, 2018

Original Article:

Basic Concepts in Geographic Information Systems (GIS)
By CWanamaker
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