NGP Standards and Specifications

Lidar Base Specification Online


The current version of the Lidar Base Specification is Version 2.1. See below for previous versions. 

Please note that the LBS online pages are maintained and subject to changes for clarity, addition of supporting information such as links, and correction of errors. If you find an item that needs correction, please contact us at

Welcome to the Lidar Base Specification online edition 

Historically, the Lidar Base Specification (LBS) was published as U. S. Geological Survey Techniques and Methods, book 11, chapter B4 (TM-11B4) with Hans Karl Heidemann as the primary author. In 2018, the USGS changed the review and approval method for updating the LBS and, concurrently, changed the publication method to make the updates more timely (see the Elevation Specifications Review Board page for more information). Along with these changes, the version of the specification was updated to 2.0. Version 2.1 of the specification was approved in September, 2019, by the USGS Elevation Specifications Review Board and the 3DEP Working Group. 

Links to the LBS

The revision history of the LBS can be found on the Lidar Base Specification Revision History page. Dates of publication are given in parentheses after the title. During the transition from print publication to online publication, versions 1.3 and 2.0 were in effect concurrently. This ended with the publication of version 2.1. 

Lidar Base Specification Version 2.1 (OCT 2019)

Lidar Base Specification Version 2.0 (JUL 2018 in Spec-X, available online JUL 2019)

The following links are to pdf versions of previous versions of the LBS

Lidar Base Specification Version 1.3 (FEB 2018)

Lidar Base Specification Version 1.2 (OCT 2014)

Lidar Base Specification Version 1.0  (AUG 2012)