Geospatial Positioning Accuracy Standards, Part 2: Standards for Geodetic Networks

Dcoument number


Maintenance Authority

National Geodetic Survey


To provide consistency in reporting the accuracy of point geospatial data collected by different activities (e.g., geodetic surveying, topographic mapping, bathymetric mapping, facilities management mapping, cadastral surveying, etc.) and develop a FGDC document with a single methodology that defines how to report the positional accuracy for all point geospatial data collected, produced, or disseminated by the Federal government and the Nation.


Part 2 applies to accuracy reporting for geodetic networks. Geodetic control surveys are usually performed to establish a basic control network (framework) from which supplemental surveying and mapping work, covered in other parts of this document, is performed. Geodetic network surveys are distinguished by use of redundant, interconnected, permanently monumented control points that comprise the framework for the National Spatial Reference System (NSRS) or are often incorporated into the NSRS.

These surveys must be performed to far more rigorous accuracy and quality assurance standards than those for control surveys for general engineering, construction, topographic mapping, or cadastral purposes. Geodetic network surveys included in NSRS must be performed to meet automated data recording, submittal, project review, and least squares adjustment requirements established by the National Geodetic Survey (NGS).

Sponsored by

Federal Geodetic Control Subcommittee

Project history

Proposal FGDC Standards Working Group
Draft 1996-12 FGDC Standards Working Group
Comment adjudication log 1998-04 FGDC Steering Committee
FGDC-endorsed standard 1998 FGDC Steering Committee