COOPS Website Overview

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CO-OPS Website Overview
Scott Duncan, NOAA
Center for
Operational Oceanographic Products and Services
(CO-OPS)
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CO-OPS Main Web Site
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Main CO-OPS Web Site
Tides Online
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PORTS
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Main CO-OPS Web Site
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Sea Level Trends
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Water Level Observations
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Web Access to Benchmark Data
http//www.co-ops.nos.noaa.gov
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Published Benchmark Sheets
Also has links for non-US benchmarks as well as a
direct link to the National Geodetic Survey (NGS)
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Published Benchmark Sheet Selections for CT
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Benchmark Descriptions
NGS Data Sheet
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Published Benchmark Sheet
NAVD 88
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Visual Representation of Datums
Start at www.ngs.noaa.gov which is the NGS
home page.
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Datum Staff Representation
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How to Use CO-OPS Web Site to Determine Geodetic
Elevations Relative to Tidal Datums

• Start with the Published Benchmark Sheet area of
  the CO-OPS web site.

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NAVD 88
Differences
The MATH
14.226 17.300 19.360 9.347 9.062
4.014 4.010 4.010 4.013 4.008

4.011 ft
/5
20.055
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Find Accepted Datums
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The Variables...
Station ID 8466573 Shelton, Housatonic R., CT
Benchmarks J77 1985 185
BM Above STND 33.799m 35.408m
NAVD 88 32.627m 34.250m
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?
Now The Math...
Set BMs to Station Datum
J77 1985 33.799 0.416 34.215m
1.588m
185 35.408 0.416 35.824m
1.574m
Calculate NAVD Above Station Datum
3.162m
/2
1.581m
J77 1985 34.215 32.627 1.588m
NAVD Above Station Datum
185 35.824 34.250 1.574m
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TIDES SUPPORT TO NAUTICAL CHARTING HYDROGRAPHY
APPLICATIONS
SOUNDINGS ARE REFERRED TO MLLW
HEIGHTS ARE REFERRED TO MHW
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Summary

• WWW.CO-OPS.NOS.NOAA.GOV
• Features
• Online publications
• Tides Online
• PORTS Real-Time Data
• Tide tables with on the fly prediction
  capabilities
• Water level observations historical data
• Published benchmark sheets
• NGS/CO-OPS datum visual representations
• Calculating geodetic datums on the fly