Calibration Base Lines for Electronic Distance Measuring Instruments (EDMI)

Metadata Updated: November 17, 2018

A calibration base line (CBL) is a precisely measured, straight-line course of approximately 1,400 m used to calibrate Electronic Distance Measuring Instruments (EDMI). A CBL usually consists of four segments ranging from 150 to 1,400 m whose lengths are measured with two high precision EDMI. Since the program began in 1974, NGS has established more than 300 base lines throughout the United States in cooperation with government agencies, universities and professional groups. Participating organizations must select a suitable site that is accessible for public use and install the base line markers 2 to 3 months before measurements are taken. Published CBL distances are available from the National Geodetic Survey, 301-713-3242 or ngs.infocenter@noaa.gov. For more information, please refer to: [1] NOAA Technical Memorandum NOS NGS-8 - Establishment of Calibration Base Lines (1994). [2] NOAA Technical Memorandum NOS NGS-10 - Use of Calibration Base Lines (1977). Both publications are available in pdf from http://www.ngs.noaa.gov/PUBS_LIB/pub_index.html.

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Dates

Metadata Date February 8, 2018
Metadata Created Date February 7, 2018
Metadata Updated Date November 17, 2018
Reference Date(s) 1974 (publication)
Frequency Of Update asNeeded

Metadata Source

Harvested from NOAA CSW Harvest Source

Additional Metadata

Resource Type Dataset
Metadata Date February 8, 2018
Metadata Created Date February 7, 2018
Metadata Updated Date November 17, 2018
Reference Date(s) 1974 (publication)
Responsible Party National Geodetic Survey (Point of Contact, Custodian)
Contact Email
Access Constraints Access Constraints: None | Use Constraints: None | Distribution Liability: none
Bbox East Long -67
Bbox North Lat 71
Bbox South Lat 18
Bbox West Long -175
Coupled Resource
Frequency Of Update asNeeded
Guid gov.noaa.nmfs.inport:39910
Harvest Object Id 88678338-514a-4ef8-8210-a25689b6bc28
Harvest Source Id 2aed8e29-fc5b-4cde-aa66-fb1118fd705e
Harvest Source Title NOAA CSW Harvest Source
Licence
Metadata Language eng
Metadata Type geospatial
Progress completed
Spatial Data Service Type
Spatial Reference System
Spatial Harvester True
Temporal Extent Begin 1974

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