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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

slide3

As

Of

6/

6/

12

slide6

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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