Federal Base Network Surveys

http://www.ngs.noaa.gov/PROJECTS/FBN/

The Federal Base Network (FBN) is a
nationwide network of permanently
monumented stations spaced 100
kilometers apart with higher density in crustal motion areas. The FBN provides spatial reference control that has some of the most precise accuracies available today.

The FBN is designed to provide the
following local accuracies
(with a 95% confidence level):
1 centimeter for latitudes and longitudes
2 centimeters for ellipsoidal heights
3 centimeters for orthometric heights
50 microgals for gravity
1 millimeter per year for crustal motion.

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Date Of Record Release	2009-09-21 16:06:18
Description	The Federal Base Network (FBN) is a nationwide network of permanently monumented stations spaced 100 kilometers apart with higher density in crustal motion areas. The FBN provides spatial reference control that has some of the most precise accuracies available today. The FBN is designed to provide the following local accuracies (with a 95% confidence level): 1 centimeter for latitudes and longitudes 2 centimeters for ellipsoidal heights 3 centimeters for orthometric heights 50 microgals for gravity 1 millimeter per year for crustal motion.
Classification	Site Management -- Surveying
Resource Type	Computer Activity
Format	Interactive
Subject	Surveying Maps
Source	National Geodetic Survey
Keyword	Maps, Surveying
Selector	Bates
Date Of Record Creation	2009-09-21 15:58:00
Education Level	Technician/Professional/Faculty
Date Last Modified	2009-09-21 16:06:18
Language	English

Date Record Checked: 2009-09-21 00:00:00 (W3C-DTF)

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