Earth observation and aerial surveys
Published 27 September 2021
Effective from 4 January 2022
This 6th edition global guidance note is intended for use by land, sea, engineering and environmental professionals acting in an advisory capacity, and by clients who are able to specify their own surveys. It is also intended for use by earth observation and aerial survey specialists. This guidance note supersedes the 5th edition of Vertical aerial photography and digital imagery, containing new sections on LiDAR and hyperspectral, multispectral, thermal and radar imaging systems.