Height Modernization Western

States Regional WebinarTuesday, November 19, 2013

10:00am PT - 2:00pm PT (1:00 – 5:00 pm ET)

OPUS-DB Publishing with OPUS(Live Demonstration)

1:30 – 2:00pm PT

Mark L. Armstrong, PLS – GeodesistOregon State Geodetic Advisor

NOAA, National Geodetic Surveymark.l.armstrong@noaa.gov

Why Publish your OPUS Solution?

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1) Helps maintain local ties to the National Spatial Reference System (NSRS).2) Users can share their observation OPUS solutions with the public via a mark datasheet.3) Provides coordinates, description, photos, and map for each observation.4) Observations on benchmarks provides NGS with ellipsoid hts. useful for;

-development of future hybrid geoid models-development of future vertical transformations

5) Local agencies, surveyors, scientists, can get datasheets for their own project marks tied to the NSRS.

But First – Accessing OPUS-DB

Click on Open the

map to browse marks

A Brief Look at OPUS-DBEach icon on the map represents an

observed mark with datasheet (click on an icon to access)

•249 Agencies•502 Users•6298 marks•6,971 solutions

Top 10VT 682FL 416OR 388MD 369LA 357OH 298AK 288WV 241MI 230TX 230

Marks Published on Federal Land

Field Procedures and Solution Quality

Suggestion… before attempting to publish

Before publishing to OPUS suggest submitting to OPUS without hitting the publish button to prove the observation data passed the quality requirements.

The Publishing Work Flow

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After submission and NGS review is complete (~24hours).

You will receiver an email from OPUS – Mark is now published and shared with the world.

What’s on the Datasheet?

TOP - is the mark description and close-up photograph.

MIDDLE - the ref. frame and epoch etc with coordinates from the solution.

BOTTOM - the horizon photo giving an impression of the mark’s surroundings and a map showing the mark’s location and directions to it.

CONTRIBUTOR

Here’s another example.

Notice the “See Also” highlight. This provides link to other obs on the same mark + any IDB entries for this mark.

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OPUS-DB and the NGSIDB

Height ComparisonOPUS DATASHEET

IDB DATASHEET

Comparison shows the OPUS GNSS ortho ht. to be 0.021 m lower than the leveled ht.

*For now, OPUS shared mark sheets and the IDB datasheets exist as two separate database tools serving different purposes.

**As the NGS begins to more fully understand the characteristics of the OPUS Database, along with future improvements to bluebooking, both databases may be more fully reconciled.

NGS OPUS Database and the NGS Integrated Database (IDB)

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Before you can make an observation you must find a benchmark…

• Use the NGS Data Explorer or• Use the program DS World and Google Earth™Facts – 1. Most benchmarks in the NGSIDB have never been

observed with GNSS and therefore do not have a measured ellipsoid height and...

2. Most benchmarks have only scaled horizontal coordinates.Observing them with GNSS and publishing provides an OPUS-DB datasheet with a current 3D coordinate tied to the NSRS.

Live Demonstration

LIVE – NGS DATA EXPLORER

– Locate a mark to observe• Found one  - PID QE0275 (X 352) – V. Order: First Class II• Print datasheet and go find it – take a digital photo of the cap• Note any new description additions• Set up tripod with GNSS antenna and observe for at least 4

hours.

LIVE – PUBLISH AN OBSERVATION

Now lets look up the new OPUS mark datasheet (LIVE)

Links

• NGS Data Explorer – cloud program– http://www.geodesy.noaa.gov/NGSDataExplorer/

• DS World – download program– http://www.geodesy.noaa.gov/PC_PROD/

PARTNERS/index.shtml

• OPUS – publish your solution– http://www.geodesy.noaa.gov/OPUS/index.jsp

QUESTIONS