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NGS Geodetic Tools and Education Services. Marti Ikehara : [email protected] California Geodetic Advisor 916-227-7325 www.ngs.noaa.gov. Topics. 1.CORS/CGPS in CA 2. Geoid12A 3.Datum Tags/Epochs 4.New Datasheet format 5.Advisor Program 6.Educational tools/services Demonstrations:

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Ngs geodetic tools and education services

NGS Geodetic Tools and Education Services

Marti Ikehara: [email protected]

California Geodetic Advisor

916-227-7325

www.ngs.noaa.gov


Topics
Topics

1.CORS/CGPS in CA

2. Geoid12A

3.Datum Tags/Epochs

4.New Datasheet format

5.Advisor Program

6.Educational tools/services

Demonstrations:

VDATUM, v3.1 (-122 12.2, 373737)

DSWorld


As

Of

6/

6/

12


New CORS in CA

CSRC requested about 130 of the CRTN backbone sites to become NGS CORS; some already were

Essentially all but a handful were added to NGS CORS network in 2nd quarter, 2012

PBO Time Series Website Awesome

http://pbo.unavco.org/data/gps/plotviewer/P334/GPS


Geoid12a development
GEOID12A Development

  • Model is BASED on ellipsoid heights published from NA2011 project

  • Proposed stations, different than for GEOID09, for inclusion/exclusion were distributed to geodetic advisors for review & acceptance/rejection; eg, because location in subsidence area

  • OPUS-DB results are included

  • To improve future geoid modeling

    • Collect GPS data on leveled BMs which are likely to have been stable since they were leveled (1988)


Geoid12a error grid
GEOID12A Error Grid

DRAFT, mid-Jan 2013


Ngs datum tags epoch dates transforms
NGS Datum Tags/Epoch Dates, Transforms

Transforms in development, mostly for batch files for mapping purposes (GIS):

NAD83 (2011) to NAD83 (2007)

NAD83 (2007) to most recent significant adjustment (98)

NAD83 (1998) to NAD83 (1992)*


Htdp currently v 3 2 3
HTDP, currently v. 3.2.3

  • 4th option: Interactively transform positions between reference frames and/or dates.

  • Epoch date format now includes deci-year

  • All NAD83 realizations are treated the same

  • Datum tag/epoch usage

    Start with NAD83(2011) 2010.00 as constraints in adjustment,

    Utilize HTDP to translates to epoch desired,

    Produce NAD83(2011) 2004.50 coordinates, for example



Dsworld mapping tool and more
DSWorld: mapping tool and more

  • Need to have Google Earth installed

  • Tools, Download PC Software, USER-CONTRI-BUTED SOFTWARE, DSWorld

  • http://www.ngs.noaa.gov/PC_PROD/PARTNERS/index.shtml

  • FIRST: Tools, Update program

  • Enhancement enables you to distinguish VERTCON NAVD88 from other(control) NAVD88



Vdatum tips
VDATUM tips

  • Must choose Height rather than Sounding

  • Must choose Ht for Source AND Target

  • Longitude shown before latitude

  • Must use – for longitude

    Improvements:

    Do not need to select geographic model region

    More streamlined interface for user

    Horizontal/geometric transformations also


The changing face of the geodetic advisor program
The Changing Face of the Geodetic Advisor Program

What are we not? Geodentists…

  • How is it changing? We are…

  • Baby boomers! Aging…Retiring

  • Fewer cooperative partners (states)

    can justify the financial agreement

  • Recommendation from some many years ago was for Fedgov to fully fund Advisor program

  • Advisors to be located at NOAA or Fed office


The changing face of the geodetic advisor program geography
The Changing Face of the Geodetic Advisor Program, Geography

  • Provide equal service to non-coop states

  • REGIONALIZATION

  • 15 advisors total for 50 states, PR, Pacific islands

  • Regions being discussed in NGS Advisory Group

    [email protected] is Chair (SAB Chief)

  • Situated in a city with decent airport!

  • Proposal includes “State Coordinator” as POC

  • Transition in next 4 years, with attrition


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