Skip to main content
U.S. flag

An official website of the United States government

NGP Standards and Specifications

Standards and specifications are essential to facilitate the development and sharing of geospatial data and products. 

National Geospatial Program (NGP) standards and specifications define requirements to ensure that all maps and data prepared by NGP, in support of The National Map, are consistent in accuracy, structure, format, style, and content.


For comments or questions about any USGS National Geospatial Program standards and specifications, please e-mail



3DEP Lidar Base Spec News


Lidar Base Specification 2022 rev. A is now available!


Lidar Base Specification 2021 rev. A Now Available


Elevation-derived hydrography acquisition specifications

Hydrographic features derived from U.S. Geological Survey (USGS) 3D Elevation Program data, and collected for use by the USGS, must meet the specifications described in this document. The specifications described herein pertain to the final product delivered to the USGS, not to methods used to derive the hydrographic features. The specifications describe the collection area, spatial reference syst
Silvia Terziotti, Christy-Ann Archuleta

Elevation-derived hydrography—Representation, extraction, attribution, and delineation rules

With the increasing availability of 3D Elevation Program (3DEP) quality high resolution elevation data across the United States and the pressing need for better integrated elevation and hydrography data, the U.S. Geological Survey is developing guidance to improve the horizontal and vertical alignment of these datasets. The U.S. Geological Survey is providing the Elevation-Derived Hydrography—Acqu
Christy-Ann Archuleta, Silvia Terziotti

US Topo Product Standard

This document defines a U.S. Geological Survey (USGS) digital topographic map. This map product series, named “US Topo,” is modeled on the now historical USGS 7.5-minute (1:24,000 scale) topographic map series produced and printed by the USGS from 1947 to 2006. US Topo maps have the same extent, scale, and general layout as the historical topographic maps. US Topo maps incorporate an orthorectifie
Larry R. Davis, Kristin A. Fishburn, Helmut Lestinsky, Laurence R. Moore, Jennifer L. Walter